Efficacy and Safety of a Parenteral Nutrition Program for Patients with RAS Wild-Type Metastatic Colorectal Cancer Administered First-Line Cetuximab Plus Chemotherapy: A Propensity Score Matching Study
by
, ,
Yu-Tang Chang
1,2, 
Chou-Chen Chen
3,
Shih-Ching Chang
4,
Yu-Yao Chang
5,6,
Bo-Wen Lin
7,
Hong-Hwa Chen
8,
Yao-Yu Hsieh
9,10,
Hung-Chih Hsu
11,12,
Meng-Che Hsieh
13,
Feng-Che Kuan
14,
Chih-Chien Wu
15,16,
Wei-Chen Lu
17,
Yu-Li Su
18,
Yi-Hsin Liang
19,
Joe-Bin Chen
20,
Shuan-Yuan Huang
5,
Ching-Wen Huang
2,21,* and
Jaw-Yuan Wang
2,21,22,23,24,* 1
Division of Pediatric Surgery, Department of Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
2
Department of Surgery, Faculty of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
3
Department of Surgery, Taichung Veterans General Hospital, Taichung 40705, Taiwan
4
Division of Colon and Rectal Surgery, Department of Surgery, Veterans General Hospital, Taipei 11217, Taiwan
5
Department of Colorectal Surgery, Changhua Christian Hospital, Changhua 50006, Taiwan
6
Department of Post-Baccalaureate Medicine, College of Medicine, National Chung Hsing University, Taichung 40227, Taiwan
7
Department of Surgery, National Cheng Kung University Hospital, Tainan 70457, Taiwan
8
Division of Colon and Rectal Surgery, Department of Surgery, Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan
9
Division of Hematology and Oncology, Shuang Ho Hospital, Taipei Medical University, New Taipei City 23561, Taiwan
10
Division of Hematology and Oncology, Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan
11
Division of Hematology-Oncology, Department of Internal Medicine, Chang Gung Memorial Hospital at Linkou, Taoyuan 33305, Taiwan
12
College of Medicine, Chang Gung University, Taoyuan 33305, Taiwan
13
Division of Hematology-Oncology, Department of Internal Medicine, E-Da Hospital, I-Shou University, Kaohsiung 84001, Taiwan
14
Department of Hematology and Oncology, Chang Gung Memorial Hospital, Chiayi 61363, Taiwan
15
Division of Colorectal Surgery, Department of Surgery, Kaohsiung Veterans General Hospital, Kaohsiung 81362, Taiwan
16
School of Medicine, National Yang Ming Chiao Tung University, Taipei 30010, Taiwan
17
Department of Oncology, National Taiwan University Hospital Yunlin Branch, Yunlin 64041, Taiwan
18
Division of Hematology and Oncology, Department of Internal Medicine, Chang Gung Memorial Hospital, Kaohsiung 33305, Taiwan
19
Department of Oncology, National Taiwan University Hospital, Taipei 10002, Taiwan
20
Department of Surgery, Chung Shan Medical University Hospital, Taichung 40201, Taiwan
21
Division of Colorectal Surgery, Department of Surgery, Kaohsiung Medical University Hospital, Kaohsiung 80756, Taiwan
22
Graduate Institute of Clinical Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
23
Center for Cancer Research, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
24
Pingtung Hospital, Ministry of Health and Welfare, Pingtung 90054, Taiwan
*
Authors to whom correspondence should be addressed.
Nutrients 2023, 15(13), 2971; https://doi.org/10.3390/nu15132971
Submission received: 27 May 2023
/
Revised: 16 June 2023
/
Accepted: 20 June 2023
/
Published: 30 June 2023
(This article belongs to the Section Clinical Nutrition)
Abstract
:Malnutrition is a common problem in patients with metastatic colorectal cancer (mCRC) receiving targeted therapy plus chemotherapy, resulting in severe toxicity and decreased survival rates. This retrospective study employing propensity score matching (PSM) examined the efficacy and safety of a supplemental home parenteral nutrition (HPN) program for patients with RAS wild-type mCRC receiving cetuximab plus chemotherapy. This retrospective nationwide registry study included data from 14 medical centers/hospitals across Taiwan, and the data period ranged from November 2016 to December 2020. Patients with RAS wild-type mCRC receiving cetuximab plus chemotherapy as their first-line therapy were included and divided into HPN and non-HPN program groups. HPN was initiated based on patient-specific factors, such as baseline nutritional status, treatment-related toxicities, and comorbidities. Clinical outcomes were evaluated using response to therapy, duration of response (DoR), progression-free survival (PFS), and overall survival (OS). This study recruited 758 patients, of whom 110 and 648 were included in the HPN and non-HPN program groups, respectively. After 1:3 PSM, the data of 109 and 327 patients from the HPN and non-HPN program groups were analyzed, respectively. The HPN program group had a higher metastasectomy rate (33.9% vs. 20.2%, p = 0.005), and longer duration of treatment and DoR than the non-HPN program group (13.6 vs. 10.3 and 13.6 vs. 9.9 months, p = 0.001 and < 0.001, respectively). The HPN program group tended to have a longer median PFS (18.2 vs. 13.9 months, p = 0.102). Moreover, we noted a significant improvement in the median OS in the same group (53.4 vs. 34.6 months, p = 0.002). Supplemental HPN programs may be recommended for select patients with mCRC receiving targeted therapy plus chemotherapy to improve oncological outcomes.
1. Introduction
Colorectal cancer (CRC) is a prevalent cancer, with an estimated 1.9 million cases and 915,880 deaths reported globally in 2020 [1]. In Taiwan, CRC has become the most commonly diagnosed cancer and the third leading cause of cancer-related deaths since 2006, with over 18,400 new cases and an incidence rate of 51.14 per 100,000 individuals in 2020 [2]. Furthermore, a considerable proportion (18.9%) of patients with CRC in Taiwan have metastatic CRC (mCRC) [2], highlighting the need for effective and advanced therapies to prolong such patients’ survival and improve their quality of life [3].
According to the American Cancer Society, the 5-year survival rate of patients with mCRC is approximately 13% [4]. The survival rate of patients with mCRC depends on several factors, including the extent of cancer, the patient’s age and overall health, and the treatment they receive [4]. Treatment options for CRC include surgery, chemotherapy, targeted therapy, and immunotherapy. The choice of treatment depends on the location and extent of cancer and various individual factors. RAS wild-type mCRC refers to a type of mCRC that does not have mutations in the RAS gene [5]. Cetuximab plus chemotherapy substantially improved the overall response rate (ORR), progression-free survival (PFS), and overall survival (OS) in patients with RAS wild-type mCRC [3,6,7]. However, this combination therapy can cause considerable gastrointestinal toxicity, including diarrhea, nausea, and vomiting, exacerbating malnutrition and weight loss [8].
Malnutrition and weight loss are common problems in patients with mCRC and considerably affect their recovery process and ability to tolerate the side effects of cancer therapy [8]. In patients with a severe case of malnutrition, a feeding tube may be necessary to provide nutrition directly to the body. According to the European Society for Clinical Nutrition and Metabolism, parenteral nutrition (PN) may be recommended when patients with cancer have severe malnutrition or are unable to absorb nutrients through the digestive system due to factors such as surgery [9]. Costanzo et al. reported that PN significantly prolonged survival by 3 months in patients with metastatic cancer [10]. When patients with advanced cancer are unable to receive adequate nutrients enterally or orally while continuing their anticancer therapy, home parenteral nutrition (HPN) may be an important component of their care plan [11,12,13].
The routine use of PN support in patients with incurable cancer is generally not recommended [9]. The evidence supporting the benefits of PN intervention in cancer patients is limited. However, nutrition support continues to be prescribed for patients with cancer. Malignant disease represents a significant proportion of cases requiring HPN, accounting for approximately half of all cases in a large series [14]. Despite the limited evidence, individualized assessments should be conducted for each patient to determine the most suitable approach to nutrition support based on their specific circumstances and needs.
In the context of mCRC patients with RAS wild-type receiving cetuximab plus chemotherapy, the impact of supplemental HPN remains uncertain. Therefore, we conducted a retrospective study using propensity score matching (PSM) to investigate the efficacy and safety of treatment with and without a supplemental HPN program in this patient population. The objective of this study was to assess whether the use of supplemental HPN could improve treatment outcomes for mCRC patients undergoing cetuximab plus chemotherapy.
2. Patients and Methods
2.1. Study Design and Patient Population
A retrospective nationwide registry study was conducted between November 2016 and December 2020 across 14 medical centers/hospitals in Taiwan, and it focused on patients with RAS wild-type mCRC who received cetuximab plus chemotherapy as first-line therapy. Treatment regimens were previously reported [15]. Patients received cetuximab plus FOLFIRI (folinic acid, fluorouracil, and irinotecan) or FOLFOX (folinic acid, fluorouracil, and oxaliplatin) on day 1 of each 14-day treatment cycle. Treatment was continued until disease progression was noted, unacceptable toxic effects occurred, a complete response was achieved, surgical resection became possible, or the patient or physician decided to discontinue treatment. Cetuximab therapy was halted if any patient developed a grade 3 or 4 allergic or hypersensitivity reaction.
Enrolled patients were categorized into HPN and non-HPN program groups. In the supplemental HPN program group, the use of HPN was individualized on the basis of patient-specific factors, such as baseline nutritional status, treatment-related toxicities, and comorbidities. The supplemental HPN program was initiated to improve nutritional status if a patient’s nutritional risk index was ≤97.5 during treatment [16]. In addition, PN was used to manage treatment-related toxicities, such as diarrhea and mucositis, which can affect oral intake and nutritional status. Close monitoring and assessment of nutritional status were essential to ensure the timely and appropriate adjustment of PN therapy. It is important to note that patients with an estimated life expectancy of less than three to six months were not offered with the supplemental HPN program. This decision was made considering their limited life expectancy and the potential burden of initiating long-term nutritional support. The present study was approved by local ethics committees (KMUHIRB-E(I)-20200036) and conducted in accordance with guidelines contained in the Declaration of Helsinki of 1975, as revised in 1996.
2.2. Clinical Outcome Assessment
Responses to therapy were assessed using computed tomography based on the Response Evaluation Criteria in Solid Tumors (version 1.1) [17]. Tumor markers, such as carcinoembryonic antigen (CEA) and carbohydrate antigen 19-9 (CA19-9), were measured to evaluate treatment response and disease behavior. The primary endpoint was metastasectomy, objective response rate (ORR), duration of treatment (DoT), duration of response (DoR), disease control rate (DCR), and adverse events. PFS and OS were secondary endpoints. PFS was calculated from the treatment start date until tumor progression or death. OS was calculated from the treatment start date to the time of death due to any cause. For patients who were alive at the final analysis, data on survival were censored at the last contact date.
2.3. Statistical Analysis
To minimize potential selection bias, we used PSM to match compatible groups [18]. The PSM caliper matching method (matching ratio, 1:3) was used to match patients in the HPN program group with those in the non-HPN program group, with consideration for patients’ demographic characteristics (age and sex), clinical cancer stage (including T and N stages), tumor location (distance from the anal verge), Eastern Cooperative Oncology Group performance status, and body mass index. All data were fully anonymized before analysis. The baseline characteristics of included patients and response data are presented as n (%) or median and interquartile range, as appropriate. Clinical and demographic data were compared using appropriate statistical tests, including Pearson’s chi-squared test, Fisher’s exact test, or Student’s t-test. PFS and OS are expressed as median values with 95% confidence intervals (CIs) and estimated using the Kaplan–Meier method. The log-rank test was used to compare time-to-event distributions. Statistical significance was set at p < 0.05. All statistical analyses were performed using SPSS version 21.0 (IBM Corp, Armonk, NY, USA).
3. Results
3.1. Study Populations and Baseline Characteristics
This study included 758 patients with mCRC who received cetuximab plus chemotherapy as the first-line treatment. Among them, 110 and 648 patients were included in the HPN and non-HPN program groups, respectively. In the HPN program group, HPN was administered in 13 (11.8%) patients. The median duration of HPN administration was 94 (range, 6–298) days. After PSM was applied, 109 patients from the HPN program group and 327 from the non-HPN program group were included in the analysis. Table 1 summarizes the baseline characteristics of the patients before (n = 758) and after (n = 436) PSM.
Before PSM was applied, significant differences in age (p = 0.036) and the number of metastatic sites (p = 0.008) were observed between the groups. However, following PSM, no differences were noted between the groups after adjustment for confounding variables (all p > 0.05).
3.2. Efficacy
Table 2 summarizes the oncological outcomes of the patients before and after PSM. The HPN program group had a higher response rate to therapy than the non-HPN program group (p = 0.013). Moreover, the HPN program group had a higher metastasectomy rate than the non-HPN program group (33.9% vs. 20.6%, p = 0.005). However, no significant differences in the ORR or DCR were noted between the groups (p = 0.928 and 0.754, respectively). Moreover, the HPN program group had a longer DoT and DoR than the non-HPN program group (13.6 vs. 10.3 and 13.6 vs. 9.9 months, p = 0.001 and <0.001, respectively).
3.3. Adverse Events
Table 3 and Table 4 summarize the adverse events before and after PSM, respectively. After PSM was applied, the HPN program group was revealed to have a higher risk of hematologic and non-hematologic adverse events (p < 0.001 and p < 0.001, respectively). The HPN program group had higher rates of high-grade hematologic adverse events, such as anemia (27.5% vs. 3.1%), neutropenia (8.3% vs. 0.6%), and febrile neutropenia (22.0% vs. 2.1%), than the non-HPN program group (p < 0.001; Table 4).
3.4. Survival Rate
Figure 1 displays the Kaplan–Meier survival curves for the HPN and non-HPN program groups before and after PSM. After PSM was applied, the median PFS for the HPN program group was 18.2 (95% CI: 14.7–21.7) months compared with 13.9 (95% CI: 12.5–15.3) months for the non-HPN program group. PFS at 5 years was 14.4% in the HPN program group and 15.8% in the non-HPN program group; the 5-year PFS did not significantly differ between the groups (p = 0.102).
After PSM was applied, we noted a 5-year OS rate of 45.2% and median OS of 53.4 (95% CI: 36.3–70.4) months in the HPN program group. In the non-HPN program group, the OS was 22.8% and the median OS was 34.6 (95% CI: 31.3–38.0) months. The HPN program group had a significantly longer OS than the non-HPN program group (53.4 vs. 34.6 months, p = 0.002).
4. Discussion
Cetuximab is a monoclonal antibody that targets the epidermal growth factor receptor (EGFR), which is often overexpressed in different types of cancer, including CRC [19]. RAS genes are frequently mutated in CRC and play a crucial role in cell signaling pathways [20]. Cetuximab is only effective in patients with RAS wild-type tumors. In patients with RAS wild-type mCRC, cetuximab has been observed to be effective when used in combination with chemotherapy as the first-line treatment [3,6]. Various clinical trials have examined the efficacy and safety of cetuximab plus chemotherapy in the first-line treatment of RAS wild-type mCRC [15,21]. These studies have consistently indicated that compared with chemotherapy alone, cetuximab plus chemotherapy more effectively enhanced OS, PFS, and ORR.
One of the most significant trials was the CRYSTAL trial, which enrolled 1198 patients with untreated mCRC [21]. Patients were randomly assigned to receive either FOLFIRI chemotherapy or FOLFIRI plus cetuximab. The findings indicated that the addition of cetuximab to FOLFIRI improved OS by 1.5 months, PFS by 1.4 months, and ORR by 10%. Another large trial was the FIRE-3 trial [15], which enrolled 592 patients with untreated mCRC. Patients were randomly assigned to receive FOLFIRI plus cetuximab or FOLFIRI plus bevacizumab. The results revealed that the addition of cetuximab to FOLFIRI improved OS by 3.7 months, PFS by 1.6 months, and ORR by 14%. A recent study indicated that the median PFS in patients with mCRC receiving first-line bevacizumab and FOLFIRI was extended from 10 months to 14 months through the identification of the UGT1A1 polymorphism and the administration of a subsequent dose escalation of irinotecan [22]. In the present study, after PSM, we observed that the use of the HPN program in conjunction with cetuximab plus chemotherapy as the first-line treatment led to an 18.8-month improvement in OS in patients with mCRC.
Various factors can affect the efficacy and safety of first-line cetuximab plus chemotherapy in patients with RAS wild-type mCRC. For example, the location of the primary tumor (i.e., in the colon or rectum) can affect the response to cetuximab-based therapy. Patients with left-sided colon tumors typically had better outcomes than those with right-sided tumors. A large study conducted in Taiwan, which retrospectively analyzed 1583 patients with mCRC, determined that the median PFS and OS were longer in the EGFR left-sided colon group (9.8 and 34.3 months, respectively) than in the EGFR right-sided colon group (5.8 and 13.8 months, respectively) [23]. In addition, the performance status of patients, which reflects their ability to perform daily activities, may affect their treatment response. Patients with satisfactory performance status tended to have better outcomes than those with poor performance status [24]. Furthermore, patients’ characteristics, such as age, sex, and comorbidities, can affect the safety of cetuximab plus chemotherapy. Older patients may be more susceptible to adverse events, and those with preexisting medical conditions may have a higher risk of complications [25]. To mitigate potential selection bias, PSM was used in this study to match compatible groups.
Cetuximab plus chemotherapy can cause adverse events in the gastrointestinal system, such as diarrhea, nausea, and vomiting, leading to decreased food intake and nutrient absorption [8]. This can further exacerbate poor appetite, malnutrition, and weight loss in patients. Other potential complications of cetuximab plus chemotherapy include skin rash, infusion reactions, and electrolyte imbalance [26]. Moreover, chemotherapeutic drugs used to treat mCRC can cause myelosuppression, leading to low blood cell counts [27]. The toxicity profile can also affect treatment efficacy because patients who experience severe toxicity may require a dose reduction or treatment interruption, which can compromise treatment effectiveness. In the present study, a longer treatment duration was associated with a higher percentage of adverse events. However, supplemental HPN may improve the ability of patients to tolerate the side effects of systemic treatment, enabling them to receive the treatment for an extended duration and potentially leading to better oncological outcomes.
Malnutrition is a common problem in patients with mCRC and can adversely affect recovery time and the ability to tolerate the side effects of cancer therapy [8]. The use of the first-line cetuximab plus chemotherapy for RAS wild-type mCRC can worsen malnutrition due to the adverse effects of the treatment. Moreover, chemotherapy may damage the digestive tract lining, hindering nutrient absorption and contributing to malnutrition. Patients with malnutrition may have a weaker immune system, decreased tolerance to chemotherapy, and an increased risk of treatment-related complications. Supplemental HPN can provide adequate nutritional support during aggressive cancer treatment, potentially leading to better tolerance of chemotherapy and cetuximab. However, the use of PN in this setting should be individualized and based on patient-specific factors, such as baseline nutritional status, treatment-related toxicities, and comorbidities [28]. Careful monitoring of adverse events and prompt management of complications can ensure treatment safety and improve patient outcomes.
Limited clinical data are available that specifically address the timing of PN in the context of cetuximab plus chemotherapy for mCRC. According to clinical practice, as outlined in the present study, PN might be initiated early during chemotherapy or targeted therapy, ideally 7 to 10 days before the initiation of therapy. The early introduction of PN can prevent treatment-related toxicities, such as diarrhea and mucositis, which affect oral intake and nutritional status. Furthermore, the early initiation of PN can help maintain adequate nutritional status and support immune function, thus possibly improving treatment outcomes and survival.
Metastasectomy, the surgical removal of metastatic tumors in patients with mCRC, is a crucial treatment modality for select patients with limited metastatic disease because it can improve outcomes and prolong survival [29,30]. In the present study, the use of supplemental HPN was associated with a higher rate of metastasectomy. This finding may be attributed to improved nutritional status and better tolerance to therapy, which may have enabled patients to undergo the surgical resection of metastatic tumors. Furthermore, the improved clinical outcomes in the HPN program group may have allowed them to continue treatment for a longer period, leading to a longer overall treatment duration. These patients may have more effectively tolerated the treatment and thus received more cycles of chemotherapy and cetuximab, resulting in a better treatment response, higher survival rates, and longer survival times. Recently, Yeh et al. reported that patients receiving ≥7 cycles of chemotherapy plus targeted therapy exhibited a higher response rate, lower progression rate, and higher survival rate (all p < 0.05); however, adverse events did not significantly differ among groups [31]. In the current study, a median OS of 53.4 months was achieved using cetuximab plus chemotherapy in conjunction with the HPN program in the neoadjuvant setting in patients with mCRC.
HPN can improve the quality of life, nutritional status, and functional outcomes in patients with advanced cancer; however, it does not treat the underlying cause of malnutrition [32]. Furthermore, although HPN enables patients to live a more normal life outside the hospital, it is a high-risk and complex therapy associated with both immediate and long-term complications, particularly in patients with advanced cancer [11,12,13]. In terms of safety, HPN can be associated with several risks, such as infection, electrolyte imbalance, glucose intolerance, liver dysfunction, and catheter-related complications [32]. Given the limited life expectancy and the patient’s overall condition, the risks associated with nutritional support may outweigh any potential benefits. The greatest benefit was observed in patients who received HPN for 3 months, although patients receiving HPN for 1 or 2 months also demonstrated significant improvement [33]. Therefore, the decision to use HPN should be made by a multidisciplinary team who consider factors such as the patient’s overall health status, treatment goals, and the potential risks and benefits of the relevant intervention [34].
While nutritional support can offer benefits to specific patients with mCRC, its use should be approached with caution and based on individual patient evaluations [35]. Indiscriminate administration of PN to well-nourished or mildly malnourished patients is not advised due to insufficient evidence demonstrating its overall effectiveness in these patient groups. However, for severely malnourished patients or those at high risk of malnutrition due to factors such as impaired intake, gastrointestinal obstruction, or severe treatment side effects, PN may be necessary to maintain or restore their nutritional status. In such cases, the potential benefits of nutritional support outweigh the associated risks.
It is important to consider the appropriateness of nutritional intervention for patients with mCRC based on their disease prognosis and potential for a curative outcome or a long disease-free period after cancer treatment. Patients who have a potentially curable disease or can anticipate a significant period free from cancer after treatment may be best suited for consideration for nutritional intervention. Conversely, in situations where mCRC patients are terminally ill and have a limited life expectancy ranging from weeks to a few months, the routine use of PN support is not recommended. During this stage, the focus of care shifts towards palliative care, prioritizing comfort and symptom management rather than pursuing aggressive nutritional interventions.
This study has several limitations that should be considered. First, the retrospective nature of this study may limit the accuracy and reliability of the collected data. Second, the study was non-randomized and non-controlled. Thus, the absence of a comparison group limits the ability to directly attribute outcomes to the intervention (cetuximab plus chemotherapy with or without HPN). Third, the small sample size of the study may reduce the statistical power and generalizability of the findings. Fourth, the study only included patients with RAS wild-type mCRC who received cetuximab plus chemotherapy in the first-line setting; the study population may not represent the entire population of patients with mCRC. Finally, the use of HPN in the supplemental HPN program group was individualized on the basis of patient-specific factors; this may have introduced confounding factors and affected outcomes.
5. Conclusions and Perspective
The implementation of a supplemental HPN program may improve the efficacy and safety of first-line cetuximab plus chemotherapy in patients with RAS wild-type mCRC. HPN can improve nutritional status, enabling patients to receive treatment for a longer duration and reducing treatment interruptions. In addition, HPN can prevent adverse events and enhance treatment effectiveness, leading to improved patient survival. Thus, the supplemental HPN program can be recommended for select patients with mCRC receiving targeted therapy plus chemotherapy to potentially improve oncological outcomes.
Author Contributions
All authors approved the final manuscript. C.-C.C., S.-C.C., Y.-Y.C. and J.-Y.W. initiated the concept and designed the study for which all authors provided study patients and laboratory data. Y.-T.C., S.-C.C., Y.-Y.C. and J.-Y.W. collected the data. Y.-T.C. analyzed the data and wrote the manuscript. C.-C.C., S.-C.C., Y.-Y.C., C.-W.H. and J.-Y.W. reviewed the manuscript and provided critical advice; C.-C.C., S.-C.C., Y.-Y.C., B.-W.L., H.-H.C., Y.-Y.H., H.-C.H., M.-C.H., F.-C.K., C.-C.W., W.-C.L., Y.-L.S., Y.-H.L., J.-B.C., S.-Y.H., C.-W.H. and J.-Y.W. provided study material and analyze study data. All authors have read and agreed to the published version of the manuscript.
Funding
This research was financially supported by Merck Ltd., Taipei, Taiwan, an affiliate of Merck KGaA, Darmstadt, Germany (CrossRef Funder ID: 10.13039/100009945). This work was supported by grants through funding from the Ministry of Science and Technology (MOST 109-2314-B-037-046-MY3, MOST 111-2314-B-037-070-MY3, MOST 111-2314-B-037-049) and the Ministry of Health and Welfare (12D1-IVMOHW02) and funded by the health and welfare surcharge on tobacco products, and the Kaohsiung Medical University Hospital (KMUH111-1R31, KMUH111-1R32, KMUH111-1M28, KMUH111-1M29, KMUH111-1M31) and Kaohsiung Medical University Research Center Grant (KMU-TC112A04). In addition, this study was supported by the Grant of the Taiwan Precision Medicine Initiative and Taiwan Biobank, Academia Sinica, Taiwan, R.O.C.
Institutional Review Board Statement
The study was conducted in accordance with the Declaration of Helsinki and approved by the Institutional Scientific and Ethical Review Committee of Kaohsiung Medical University Hospital (KMUHIRB-E(I)-20200036).
Informed Consent Statement
Informed consent was obtained from all subjects involved in the study.
Data Availability Statement
The data that support the findings of this study are available from the corresponding author, J.Y.W., upon reasonable request.
Conflicts of Interest
The authors declare no conflict of interest.
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Figure 1.
Survival outcomes of patients with RAS wild-type mCRC before and after propensity score matching. Kaplan–Meier survival plots of (A) OS and (B) PFS before propensity score matching and (C) OS and (D) PFS after propensity score matching. HPN, HPN program group; Non-HPN, non-HPN program group.
Figure 1.
Survival outcomes of patients with RAS wild-type mCRC before and after propensity score matching. Kaplan–Meier survival plots of (A) OS and (B) PFS before propensity score matching and (C) OS and (D) PFS after propensity score matching. HPN, HPN program group; Non-HPN, non-HPN program group.
Table 1.
Baseline characteristics of the RAS wild-type patients with mCRC between supplemental HPN program group and non-supplemental HPN program group before (n = 758) and after (n = 436) propensity score matching.
Table 1.
Baseline characteristics of the RAS wild-type patients with mCRC between supplemental HPN program group and non-supplemental HPN program group before (n = 758) and after (n = 436) propensity score matching.
| Baseline Data | Overall | p | After Match (1:3) | p | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| HPN (N = 110) | Non-HPN (N = 648) | HPN (N = 109) | Non-HPN (N = 327) | ||||||||
| Gender | 0.725 | >0.999 | |||||||||
| Male | 73 | (66.4%) | 441 | (68.1%) | 72 | (66.1%) | 216 | (65.4%) | |||
| Female | 37 | (33.6%) | 207 | (31.9%) | 37 | (33.9%) | 111 | (33.6%) | |||
| Age (years) | 0.100 | 0.315 | |||||||||
| Median (IQR) | 64.4 | (55.4, 73.1) | 61.6 | (51.5, 69.8) | 63.9 | (55.4, 73.1) | 64.7 | (52.1, 71.7) | |||
| Age (years) | 0.036 | >0.999 | |||||||||
| <65 | 55 | (50.0%) | 393 | (60.6%) | 55 | (50.5%) | 165 | (50.9%) | |||
| ≥65 | 55 | (50.0%) | 255 | (39.4%) | 54 | (49.5%) | 162 | (49.1%) | |||
| ECOG performance status | 0.209 | >0.999 | |||||||||
| 0 + 1 | 108 | (98.2%) | 616 | (95.1%) | 107 | (98.2%) | 321 | (98.2%) | |||
| 2 | 2 | (1.8%) | 31 | (4.8%) | 2 | (1.8%) | 6 | (1.8%) | |||
| Unknown | 0 | (0.0%) | 1 | (0.1%) | 0 | (0.0%) | 0 | (0.0%) | |||
| Primary lesion site | 0.856 | 0.910 | |||||||||
| Left-sided | 100 | (90.9%) | 581 | (89.7%) | 99 | (90.8%) | 294 | (89.9%) | |||
| Right-sided | 10 | (9.1%) | 62 | (9.6%) | 10 | (9.2%) | 31 | (9.5%) | |||
| Unknown/Both | 0 | (0.0%) | 5 | (0.7%) | 0 | (0.0%) | 2 | (0.6%) | |||
| Synchronous/metachronous | 0.122 | 0.774 | |||||||||
| Synchronous | 61 | (55.5%) | 407 | (62.8%) | 61 | (56.0%) | 187 | (56.7%) | |||
| Metachronous | 49 | (44.5%) | 237 | (36.6%) | 48 | (44.0%) | 138 | (41.8%) | |||
| Unknown | 0 | (0.0%) | 4 | (0.6%) | 0 | (0.0%) | 2 | (1.5%) | |||
| BRAF genotyping | 0.331 | 0.276 | |||||||||
| Wild type | 108 | (98.2%) | 439 | (67.8%) | 107 | (98.2%) | 207 | (62.7%) | |||
| Mutant type | 1 | (0.9%) | 15 | (2.3%) | 1 | (0.9%) | 7 | (2.1%) | |||
| Unknown | 1 | (0.9%) | 194 | (29.9%) | 1 | (0.9%) | 113 | (34.2%) | |||
| Metastatic sites | 0.173 | 0.292 | |||||||||
| Liver | 39 | (35.5%) | 249 | (38.4%) | 39 | (35.8%) | 145 | (44.3%) | |||
| Lungs | 16 | (14.5%) | 52 | (8.0%) | 16 | (14.7%) | 32 | (9.8%) | |||
| Liver + lungs | 8 | (7.3%) | 56 | (8.7%) | 8 | (7.3%) | 18 | (5.5%) | |||
| Others | 47 | (42.7%) | 291 | (44.9%) | 46 | (42.2%) | 132 | (40.4%) | |||
| Number of metastatic sites | 0.008 | >0.999 | |||||||||
| 1 | 73 | (66.4%) | 337 | (52.0%) | 73 | (67.0%) | 219 | (67.0%) | |||
| ≥2 | 36 | (32.7%) | 295 | (45.5%) | 36 | (33.0%) | 108 | (33.0%) | |||
| Unknown | 1 | (0.9%) | 16 | (2.5%) | 0 | (0.0%) | 0 | (0.0%) | |||
| Serum CEA level before treatment | 0.455 | 0.617 | |||||||||
| <5 ng/mL | 33 | (30.0%) | 147 | (22.7%) | 33 | (30.3%) | 78 | (23.9%) | |||
| ≥5 ng/mL | 77 | (70.0%) | 407 | (62.8%) | 76 | (69.7%) | 206 | (63.0%) | |||
| Unknown | 0 | (0.0%) | 94 | (14.5%) | 0 | (0.0%) | 43 | (13.1%) | |||
mCRC, metastatic colorectal cancer; HPN, supplemental HPN program group; Non-HPN, non-supplemental HPN program group; IQR, interquartile ranges; ECOG, Eastern Cooperative Oncology Group; CEA, carcinoembryonic antigen.
Table 2.
The comparison of efficacy between supplemental HPN program group and non-supplemental HPN program group before (n = 758) and after (n = 436) propensity score matching.
Table 2.
The comparison of efficacy between supplemental HPN program group and non-supplemental HPN program group before (n = 758) and after (n = 436) propensity score matching.
| Overall | p | After Match (1:3) | p | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| HPN (N = 110) | Non-HPN (N = 648) | HPN (N = 109) | Non-HPN (N = 327) | |||||||||
| Response to cetuximab in first-line treatment | 0.063 | 0.013 | ||||||||||
| CR | 3 | (2.7%) | 68 | (10.5%) | 3 | (2.8%) | 45 | (13.8%) | ||||
| PR | 60 | (54.6%) | 307 | (47.4%) | 60 | (55.0%) | 148 | (45.3%) | ||||
| SD | 30 | (27.3%) | 163 | (25.2%) | 29 | (26.6%) | 90 | (27.5%) | ||||
| PD | 12 | (10.9%) | 78 | (12.0%) | 12 | (11.0%) | 33 | (10.1%) | ||||
| Not evaluable/Unknown | 5 | (4.6%) | 32 | (4.9%) | 5 | (4.6%) | 11 | (3.4%) | ||||
| Metastasectomy rate | 37 | (33.6%) | 123 | (19.0%) | 0.001 | 37 | (33.9%) | 66 | (20.2%) | 0.005 | ||
| Metastatic site resection | 0.001 | 0.005 | ||||||||||
| No resection | 73 | (66.4%) | 516 | (79.6%) | 72 | (66.1%) | 255 | (78.0%) | ||||
| Resection | 37 | (33.6%) | 123 | (19.0%) | 37 | (33.9%) | 66 | (20.2%) | ||||
| R0 resection | 26 | (23.6%) | 100 | (15.4%) | 26 | (23.9%) | 55 | (16.8%) | ||||
| R1 resection | 10 | (9.1%) | 20 | (3.1%) | 10 | (9.2%) | 10 | (3.1%) | ||||
| R2 resection | 1 | (0.9%) | 3 | (0.5%) | 1 | (0.9%) | 1 | (0.3%) | ||||
| Unknown | 0 | (0.0%) | 9 | (1.4%) | 0 | (0.0%) | 6 | (1.8%) | ||||
| ORR | 0.865 | 0.928 | ||||||||||
| CR + PR | 63 | (57.3%) | 375 | (57.9%) | 63 | (57.8%) | 193 | (59.0%) | ||||
| SD + PD | 42 | (38.2%) | 241 | (37.2%) | 41 | (37.6%) | 123 | (37.6%) | ||||
| DCR | 0.724 | 0.754 | ||||||||||
| CR + PR + SD | 93 | (84.5%) | 538 | (83.0%) | 92 | (84.4%) | 283 | (86.5%) | ||||
| PD | 12 | (10.9%) | 78 | (12.0%) | 12 | (11.0%) | 33 | (10.1%) | ||||
| Survival | 0.011 | 0.013 | ||||||||||
| Yes | 72 | (65.5%) | 339 | (52.3%) | 72 | (66.1%) | 171 | (52.3%) | ||||
| No | 38 | (34.5%) | 309 | (47.7%) | 37 | (33.9%) | 156 | (47.7%) | ||||
| DoT (month) | 13.5 | (7.0, 23.3) | 9.8 | (6.0, 14.4) | <0.001 | 13.6 | (7.0, 23.7) | 10.3 | (6.4, 14.7) | 0.001 | ||
| DoR (month) | 15.6 | (9.8, 30.0) | 7.8 | (4.2, 15.4) | <0.001 | 15.6 | (9.8, 30.0) | 9.9 | (4.8, 16.9) | <0.001 | ||
HPN, supplemental HPN program group; Non-HPN, non-supplemental HPN program group; CR, complete response; PR, partial response; SD, stable disease; PD, progressive disease; CI, confidence interval; ORR, objective response rate; DCR, disease control rate; DoT, duration of treatment; DoR, duration of response.
Table 3.
Adverse events of 758 RAS wild-type mCRC patients receiving cetuximab in first-line treatment between supplemental HPN program group and non-supplemental HPN program group before propensity score matching.
Table 3.
Adverse events of 758 RAS wild-type mCRC patients receiving cetuximab in first-line treatment between supplemental HPN program group and non-supplemental HPN program group before propensity score matching.
| All Grades | p | Grade 1–2 | p | Grade ≥3 | p | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| HPN (N = 110) | Non-HPN (N = 648) | HPN (N = 110) | Non-HPN (N = 648) | HPN (N = 110) | Non-HPN (N = 648) | |||||||||||
| Hematologic (overall) | 101 | (91.8%) | 314 | (48.5%) | <0.001 | 96 | (87.3%) | 298 | (46.0%) | <0.001 | 30 | (27.3%) | 27 | (4.2%) | <0.001 | |
| Anemia | 86 | (78.2%) | 214 | (33.0%) | <0.001 | 77 | (70.0%) | 210 | (32.4%) | <0.001 | 9 | (8.2%) | 4 | (0.6%) | <0.001 | |
| Neutropenia | 89 | (80.9%) | 156 | (24.1%) | <0.001 | 65 | (59.1%) | 134 | (20.7%) | <0.001 | 24 | (21.8%) | 22 | (3.4%) | <0.001 | |
| Febrile neutropenia | 4 | (3.6%) | 8 | (1.2%) | 0.083 | 1 | (0.9%) | 6 | (0.9%) | >0.999 | 3 | (2.7%) | 2 | (0.3%) | 0.024 | |
| Thrombocytopenia | 11 | (10.0%) | 37 | (5.7%) | 0.088 | 11 | (10.0%) | 34 | (5.2%) | 0.052 | 0 | (0.0%) | 3 | (0.5%) | >0.999 | |
| Non-hematologic (overall) | 110 | (100%) | 507 | (78.2%) | <0.001 | 110 | (100%) | 502 | (77.5%) | <0.001 | 9 | (8.2%) | 49 | (7.6%) | 0.824 | |
| Skin reaction | 104 | (94.5%) | 374 | (57.7%) | <0.001 | 102 | (92.7%) | 353 | (54.5%) | <0.001 | 2 | (1.8%) | 21 | (3.2%) | 0.559 | |
| Paronychia | 17 | (15.5%) | 147 | (22.7%) | 0.087 | 17 | (15.5%) | 147 | (22.7%) | 0.087 | 0 | (0.0%) | 0 | (0.0%) | - | |
| Abdominal pain | 2 | (1.8%) | 57 | (8.8%) | 0.011 | 2 | (1.8%) | 54 | (8.3%) | 0.010 | 0 | (0.0%) | 3 | (0.5%) | >0.999 | |
| Diarrhea | 42 | (38.2%) | 148 | (22.8%) | 0.001 | 40 | (36.4%) | 140 | (21.6%) | 0.001 | 2 | (1.8%) | 8 | (1.2%) | 0.645 | |
| Nausea | 70 | (63.6%) | 216 | (33.3%) | <0.001 | 66 | (60.0%) | 215 | (33.2%) | <0.001 | 4 | (3.6%) | 1 | (0.2%) | 0.002 | |
| Vomiting | 69 | (62.7%) | 146 | (22.5%) | <0.001 | 65 | (59.1%) | 141 | (21.8%) | <0.001 | 4 | (3.6%) | 5 | (0.8%) | 0.030 | |
| Fatigue | 87 | (79.1%) | 251 | (38.7%) | <0.001 | 87 | (79.1%) | 239 | (36.9%) | <0.001 | 0 | (0.0%) | 12 | (1.9%) | 0.232 | |
| Infusion reaction | 2 | (1.8%) | 11 | (1.7%) | >0.999 | 2 | (1.8%) | 11 | (1.7%) | >0.999 | 0 | (0.0%) | 0 | (0.0%) | - | |
| Infection | 6 | (5.5%) | 16 | (2.5%) | 0.086 | 5 | (4.5%) | 13 | (2.0%) | 0.107 | 1 | (0.9%) | 3 | (0.5%) | 0.468 | |
| ALT increased | 18 | (16.4%) | 60 | (9.3%) | 0.024 | 17 | (15.5%) | 59 | (9.1%) | 0.041 | 1 | (0.9%) | 1 | (0.2%) | 0.270 | |
| AST increased | 16 | (14.5%) | 66 | (10.2%) | 0.175 | 15 | (13.6%) | 65 | (10.0%) | 0.258 | 1 | (0.9%) | 1 | (0.2%) | 0.270 | |
| Bilirubin increased | 2 | (1.8%) | 24 | (3.7%) | 0.313 | 2 | (1.8%) | 22 | (3.4%) | 0.559 | 0 | (0.0%) | 2 | (0.3%) | >0.999 | |
| Creatinine increased | 16 | (14.5%) | 28 | (4.3%) | <0.001 | 16 | (14.5%) | 24 | (3.7%) | <0.001 | 0 | (0.0%) | 4 | (0.6%) | >0.999 | |
| Hypomagnesemia | 1 | (0.9%) | 16 | (2.5%) | 0.492 | 1 | (0.9%) | 16 | (2.5%) | 0.492 | 0 | (0.0%) | 0 | (0.0%) | - | |
mCRC, metastatic colorectal cancer; HPN, supplemental HPN program group; Non-HPN, non-supplemental HPN program group; ALT, alanine aminotransferase; AST, aspartate transaminase.
Table 4.
Adverse events of 436 RAS wild-type mCRC patients receiving cetuximab in first-line treatment between supplemental HPN program group and non-supplemental HPN program group after propensity score matching.
Table 4.
Adverse events of 436 RAS wild-type mCRC patients receiving cetuximab in first-line treatment between supplemental HPN program group and non-supplemental HPN program group after propensity score matching.
| After Propensity Score Matching (1:3) | All Grades | p | Grade 1–2 | p | Grade ≥3 | p | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| HPN (N = 109) | Non-HPN (N = 327) | HPN (N = 109) | Non-HPN (N = 327) | HPN (N = 109) | Non-HPN (N = 327) | |||||||||||
| Hematologic (overall) | 100 | (91.7%) | 150 | (45.9%) | <0.001 | 95 | (87.2%) | 144 | (44.0%) | <0.001 | 30 | (27.5%) | 10 | (3.1%) | <0.001 | |
| Anemia | 85 | (78.0%) | 100 | (30.6%) | <0.001 | 76 | (69.7%) | 98 | (30.0%) | <0.001 | 9 | (8.3%) | 2 | (0.6%) | <0.001 | |
| Neutropenia | 88 | (80.7%) | 81 | (24.8%) | <0.001 | 64 | (58.7%) | 74 | (22.6%) | <0.001 | 24 | (22.0%) | 7 | (2.1%) | <0.001 | |
| Febrile neutropenia | 4 | (3.7%) | 2 | (0.6%) | 0.037 | 1 | (0.9%) | 2 | (0.6%) | >0.999 | 3 | (2.8%) | 0 | (0.0%) | 0.016 | |
| Thrombocytopenia | 11 | (10.1%) | 20 | (6.1%) | 0.196 | 11 | (10.1%) | 18 | (5.5%) | 0.098 | 0 | (0.0%) | 2 | (0.6%) | >0.999 | |
| Non-hematologic (overall) | 109 | (100.0%) | 273 | (83.5%) | <0.001 | 109 | (100%) | 272 | (83.2%) | <0.001 | 9 | (8.3%) | 36 | (11.0%) | 0.457 | |
| Skin reaction | 103 | (94.5%) | 229 | (70.0%) | <0.001 | 101 | (92.7%) | 214 | (65.4%) | <0.001 | 2 | (1.8%) | 15 | (4.6%) | 0.261 | |
| Paronychia | 17 | (15.6%) | 98 | (30.0%) | 0.003 | 17 | (15.6%) | 98 | (30.0%) | 0.003 | 0 | (0.0%) | 0 | (0.0%) | - | |
| Abdominal pain | 2 | (1.8%) | 39 | (11.9%) | 0.001 | 2 | (1.8%) | 36 | (11.0%) | 0.002 | 0 | (0.0%) | 3 | (0.9%) | 0.576 | |
| Diarrhea | 42 | (38.5%) | 96 | (29.4%) | 0.078 | 40 | (36.7%) | 91 | (27.8%) | 0.084 | 2 | (1.8%) | 5 | (1.5%) | >0.999 | |
| Nausea | 70 | (64.2%) | 130 | (39.8%) | <0.001 | 66 | (60.6%) | 129 | (39.4%) | <0.001 | 4 | (3.7%) | 1 | (0.3%) | 0.015 | |
| Vomiting | 69 | (63.3%) | 100 | (30.6%) | <0.001 | 65 | (59.6%) | 96 | (29.4%) | <0.001 | 4 | (3.7%) | 4 | (1.2%) | 0.113 | |
| Fatigue | 87 | (79.8%) | 168 | (51.4%) | <0.001 | 87 | (79.8%) | 158 | (48.3%) | <0.001 | 0 | (0.0%) | 10 | (3.1%) | 0.073 | |
| Infusion reaction | 2 | (1.8%) | 6 | (1.8%) | >0.999 | 2 | (1.8%) | 6 | (1.8%) | >0.999 | 0 | (0.0%) | 0 | (0.0%) | - | |
| Infection | 6 | (5.5%) | 10 | (3.1%) | 0.248 | 5 | (4.6%) | 7 | (2.1%) | 0.180 | 1 | (0.9%) | 3 | (0.9%) | >0.999 | |
| ALT increased | 18 | (16.5%) | 27 | (8.3%) | 0.015 | 17 | (15.6%) | 26 | (8.0%) | 0.021 | 1 | (0.9%) | 1 | (0.3%) | 0.439 | |
| AST increased | 16 | (14.7%) | 37 | (11.3%) | 0.398 | 15 | (13.8%) | 36 | (11.0%) | 0.445 | 1 | (0.9%) | 1 | (0.3%) | 0.439 | |
| Bilirubin increased | 2 | (1.8%) | 9 | (2.8%) | 0.594 | 2 | (1.8%) | 8 | (2.4%) | >0.999 | 0 | (0.0%) | 1 | (0.3%) | >0.999 | |
| Creatinine increased | 16 | (14.7%) | 15 | (4.6%) | <0.001 | 16 | (14.7%) | 14 | (4.3%) | <0.001 | 0 | (0.0%) | 1 | (0.3%) | >0.999 | |
| Hypomagnesemia | 1 | (0.9%) | 8 | (2.4%) | 0.300 | 1 | (0.9%) | 8 | (2.4%) | 0.456 | 0 | (0.0%) | 0 | (0.0%) | - | |
mCRC, metastatic colorectal cancer; HPN, supplemental HPN program group; Non-HPN, non-supplemental HPN program group; ALT, alanine aminotransferase; AST, aspartate transaminase.
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MDPI and ACS Style
Chang, Y.-T.; Chen, C.-C.; Chang, S.-C.; Chang, Y.-Y.; Lin, B.-W.; Chen, H.-H.; Hsieh, Y.-Y.; Hsu, H.-C.; Hsieh, M.-C.; Kuan, F.-C.; et al. Efficacy and Safety of a Parenteral Nutrition Program for Patients with RAS Wild-Type Metastatic Colorectal Cancer Administered First-Line Cetuximab Plus Chemotherapy: A Propensity Score Matching Study. Nutrients 2023, 15, 2971. https://doi.org/10.3390/nu15132971
AMA Style
Chang Y-T, Chen C-C, Chang S-C, Chang Y-Y, Lin B-W, Chen H-H, Hsieh Y-Y, Hsu H-C, Hsieh M-C, Kuan F-C, et al. Efficacy and Safety of a Parenteral Nutrition Program for Patients with RAS Wild-Type Metastatic Colorectal Cancer Administered First-Line Cetuximab Plus Chemotherapy: A Propensity Score Matching Study. Nutrients. 2023; 15(13):2971. https://doi.org/10.3390/nu15132971
Chicago/Turabian StyleChang, Yu-Tang, Chou-Chen Chen, Shih-Ching Chang, Yu-Yao Chang, Bo-Wen Lin, Hong-Hwa Chen, Yao-Yu Hsieh, Hung-Chih Hsu, Meng-Che Hsieh, Feng-Che Kuan, and et al. 2023. "Efficacy and Safety of a Parenteral Nutrition Program for Patients with RAS Wild-Type Metastatic Colorectal Cancer Administered First-Line Cetuximab Plus Chemotherapy: A Propensity Score Matching Study" Nutrients 15, no. 13: 2971. https://doi.org/10.3390/nu15132971
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