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Selected publications

2026

Wels, J., Hamarat, N., Gonzalez-Hijon, J., Proot, L. (2026). Prevalence and trends of multimorbidity clusters in Belgian assisted dying practice: A health registry study. Age and Ageing. 

Liu, Y., Wels, J., James, S.-N., Keuss, S. E., Maddock, J., Parker, T. D., Stafford, J., Schott, J. M., Richards, M., & Patalay, P. (2026). Persistent financial adversity and cognitive ageing: A lifecourse investigation. Innovation in Ageing. 

Lee J, Kothari K, Yang Y, Rose-Clarke K, Wels, J., Patalay, P. (2026). Religious disparities in mental health: a systematic review and conceptual framework. Social Science & Medicine. 119237.

Wels, J., Bryson, A., Kambayashi, R., Kuwahara, S., Nakamura, A. (2026). Why Are Japan’s Trade Unions Actually Growing? A decomposition of population datasets. Institute of Economic Research (Hitotsubashi University) Discussion Paper Series A N°776. 

Keanjoom, R, Choosumrong, S, Nakamura, K., Nguyen, HTL, Kitreerawuttiwong, N, Kirtsaeng, S, Gonzalez Hijon, J., Wels, J. (2026). Differential Associations of Heat Metrics with Wellbeing across 13 Thai Provinces: The Role of Social Vulnerability in a Longitudinal Cohort of Older Adults. MedRxiv https://doi.org/10.64898/2026.01.06.26343526. 

2025

Nakamura, A., Kuwahara, S., Kambayashi, R., Bryson, A., & Wels, J. (2025). なぜ労働組合の組織率は政府統計では低下し，個人調査では上昇しているのか？ [Why is the unionization rate declining in government statistics but rising in individual surveys?]. Financial Review. Ministry of Finance, Policy Research Institute, in Japanese.

Wels, J., & Hamarat, N. (2025). Trends in assisted dying among patients with psychiatric disorders and dementia in Belgium: A health registry study. PLOS Medicine, 22(11), e1004522. https://doi.org/10.1371/journal.pmed.1004522

Hamarat, N., & Wels, J. (2025). Incidence of reported cases of euthanasia adjusted for demographic composition: a study of ten years of Belgian administrative data (2014–2023). BMC Public Health, 25(1), 3843. https://doi.org/10.1186/s12889-025-24839-x

Wels, J, Maddock J, Patalay P. (2025). Cross-Country Differences in Self-Rated Health: Decomposing the Influence of Depressive Symptoms. MedRxiv, 10.1101/2025.10.23.25338675.

Wels, J, Keanjoom R, Gonzalez Hijon J, Choosumrong S (2025). Differential Associations of Heat Metrics with Health Statistics: A Spatiotemporal Analysis of Temperature Indicators and Mortality Across Thailand Provinces. MedRxiv,10.1101/2025.10.01.25337088

Bryson, A., Kambayashi, R., Kuwahara, S., Nakamura, A. & Wels, J. (2025). What is Happening to Unionization in Japan?Hitotsubashi University, Institute of Economic Research Discussion Paper Series A No.770, 1-32. 

Wels, J., & Hamarat, N. (2025). Incidence and prevalence of reported cases of euthanasia in Belgium, 2002 to 2023. JAMA Network Open 8(4), e256841. 
Kromydas, T., Demou, E., Leyland, A. H., Srinivasa Katikireddi, V., & Wels, J. (2023). Did trade unions protect employees’ mental health during the COVID-19 pandemic? A mixed effect model using UK data from Understanding Society. BMJ Public Health. Accepted for publication. 
Wels, J., & Fu, R. (2025). Associations of employment status, working time and job satisfaction with sleep duration and sleep quality among the 50+ population in Japan. Industrial Health. Accepted for publication 
Shaw, R. J., Rhead, R., Silverwood, R. J., Wels, J., Zhu, J., Hamilton, O. K., di Gessa, G., Bowyer, R. C., Moltrecht, B., Green, M. J., Demou, E., Pattaro, S., Zaninotto, P., Boyd, A., Greves, F., Chaturvedi, N., Ploubidis, G. B., & Katikireddi, S. V. (2025).Associations between different measures of SARS-CoV-2 infection status and subsequent economic inactivity: A pooled analysis of five longitudinal surveys linked to healthcare records. PLOS One. Accepted for publication 
Maddock, J., Wels, J. (2025). Key considerations in understanding retirement’s health impact. Journal of Epidemiology and Community Health. jech-2024-222936.