Exploring the Linkages Among Chronic Illness, Substance Use, and COVID-19 Infection in Adults Aged 50 Years and Older: Retrospective Cross-Sectional Analysis of National Representative Data

Suebsarn Ruksakulpiwat   ¹ , RN, MMed, PhD ;   Atsadaporn Niyomyart   ² , RN, LLB, MSN, PhD ;   Chontira Riangkam   ¹ , RN, MNS, PhD ;   Lalipat Phianhasin   ¹ , RN, MS, AGPCNP-BC ;   Chitchanok Benjasirisan   ¹ , RN, MS ;   Jon Adams   ³ , BA, MA, PhD

¹ Department of Medical Nursing, Faculty of Nursing, Mahidol University, Bangkok, Thailand

² Ramathibodi School of Nursing, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand

³ School of Public Health, University of Technology Sydney, Sydney, Australia