**5. Conclusions**

In this study, patients were assessed by a psychiatry liaison service specializing in addiction. The study provides some insights into the characteristics of in-ward patients with an SUD and reinforces the need of an individualized approach.

Our findings sugges<sup>t</sup> a high prevalence of DD amongs<sup>t</sup> patients that were attended by the addiction liaison service of a general hospital. Furthermore, parameters such as QoL and addiction severity were worse when DD was present, especially in the group of women. Such results support the importance of routinely exploring substance consumption in hospitalized patients, and assessing the presence of dual pathologies, as they can play a role not only in medical pathology, but also in QoL, and particularly in women. More studies will be necessary to determine the implications of these differences in order to elucidate specific needs.

**Supplementary Materials:** The following are available online at https://www.mdpi.com/2077-038 3/10/23/5572/s1, Table S1. Sociodemographic characteristics of participant patients vs. lockdown period patients. Table S2. Clinical characteristics of participant patients vs. lockdown period patients.

**Author Contributions:** M.T., F.D. and F.F. were responsible for the study concept and design. M.T., F.D. and T.F.-F. designed the protocol. M.T. and F.D. supervised the data research and conduct of the study. T.F.-F. conducted the interviews and wrote the first draft. J.I.M.-P., T.F.-F. and F.D. analysed and interpreted findings. T.F.-F. and F.D. wrote the initial draft of the manuscript. M.T., F.F. and F.D. supervised and revised the manuscript. All authors have read and agreed to the published version of the manuscript.

**Funding:** This work was supported by grants from the Instituto de Salud Carlos III–ISCIII Red de Trastornos Adictivos 2016 (RD16/0017/0010), and the Generalitat de Catalunya (2017SGR-530).

**Institutional Review Board Statement:** The study was approved by the Parc de Salut Mar Clinical Research Ethics Committee (SEIC-PSMAR); CEIm project number: 2019/8970/I. It does not involve psychological or pharmacological intervention, and participation is totally voluntary. The project was carried out in accordance with the principles of the protection of rights and human dignity, as stated in the Declaration of Helsinki and according to current regulations. It follows law 14/2007 on Biomedical Research. The information was treated confidentially, complying with organic law 15/1999 of 13 December 1999.

**Informed Consent Statement:** The participants were informed in writing about the study, the objectives, its voluntary nature, and any other matter that requires to be specified, as stated in the informed consent.

**Data Availability Statement:** Data are available upon request. Please contact the corresponding author if they are required.

**Conflicts of Interest:** The authors declare that they have no conflict of interest.
