Parity, Age at First Birth, and Risk of Death from Non-Hodgkin’s Lymphoma: A Population-Based Cohort Study in Taiwan
Abstract
:1. Introduction
2. Materials and Methods
2.1. Data Source
2.2. Study Population
2.3. Follow-up
2.4. Statistics
3. Results and Discussion
Variables | No. of Subjects | Follow-up Person-Years | No. of Death from Non-Hodgkin’s Lymphoma | Mortality Rate (per 100,000 Person-Years) |
---|---|---|---|---|
Age at Recruitment (1st birth) | ||||
≤23 | 551,759 | 15,312,470.08 | 149 | 0.97 |
>23 | 740,703 | 19,667,775.92 | 263 | 1.34 |
Parity | ||||
1 | 157,207 | 4,170,772.33 | 68 | 1.63 |
2 | 564,727 | 15,124,112.33 | 174 | 1.15 |
3+ | 570,528 | 15,685,361.33 | 170 | 1.08 |
Marital Status | ||||
Married | 1,260,615 | 34,115,479.25 | 399 | 1.17 |
Not married | 31,847 | 864,766.75 | 13 | 1.50 |
Years of Schooling | ||||
≤9 years | 722,518 | 19,850,938.17 | 225 | 1.13 |
>9 years | 569,944 | 15,129,307.83 | 187 | 1.24 |
Birth Place | ||||
Hospital/clinic | 1,245,925 | 33,638,862.83 | 390 | 1.16 |
Home/other | 46,537 | 1,341,383.17 | 22 | 1.64 |
Variables | Crude RR (95% CI) | Multivariate-Adjusted RR * (95% CI) |
---|---|---|
Age at recruitment (1st birth) | ||
≤23 | 1.00 | 1.00 |
>23 | 1.45 (1.18–1.77) | 1.41 (1.13–1.75) |
Parity | ||
1 | 1.00 | 1.00 |
2 | 0.70 (0.53–0.93) | 0.74 (0.55–0.98) |
3+ | 0.64 (0.49–0.85) | 0.71 (0.53–0.95) |
p = 0.01 for linear trend | p = 0.05 for linear trend | |
Continuous | 0.89 (0.83–0.96) | 0.93 (0.87–0.99) |
Marital status | ||
Married | 1.00 | 1.00 |
Not married | 1.27 (0.73–2.21) | 1.21 (0.70–2.12) |
Years of schooling | ||
≤9 years | 1.00 | 1.00 |
>9 years | 1.14 (0.94–1.38) | 1.03 (0.84–1.27) |
Birth place | ||
Hospital/clinic | 1.00 | 1.00 |
Home/other | 1.31 (0.85–2.02) | 1.46 (0.94–2.26) |
4. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Chen, B.K.; Yang, C.-Y. Parity, Age at First Birth, and Risk of Death from Non-Hodgkin’s Lymphoma: A Population-Based Cohort Study in Taiwan. Int. J. Environ. Res. Public Health 2015, 12, 9131-9140. https://doi.org/10.3390/ijerph120809131
Chen BK, Yang C-Y. Parity, Age at First Birth, and Risk of Death from Non-Hodgkin’s Lymphoma: A Population-Based Cohort Study in Taiwan. International Journal of Environmental Research and Public Health. 2015; 12(8):9131-9140. https://doi.org/10.3390/ijerph120809131
Chicago/Turabian StyleChen, Brian K., and Chun-Yuh Yang. 2015. "Parity, Age at First Birth, and Risk of Death from Non-Hodgkin’s Lymphoma: A Population-Based Cohort Study in Taiwan" International Journal of Environmental Research and Public Health 12, no. 8: 9131-9140. https://doi.org/10.3390/ijerph120809131