Supplementary data for the publication: “Burdens of digestive-related psychosomatic diseases from 1990 to 2021 and projection to 2030 in China: Findings from the 2021 Global Burden of Disease Study”

<strong>Background</strong>Digestive-related psychosomatic disorders (PSDs) pose substantial socio-economic and healthcare burdens in China. This study analyzed trends from 1990 to 2021 for common digestive-related PSDs—namely inflammatory bowel disease (IBD), peptic ulcer disease (PUD), anorexia nervosa (AN), bulimia nervosa (BN), and gastroesophageal reflux disease (GERD)—and projected their burden through 2030 to inform prevention and management.<strong>Methods</strong>Data on incidence, prevalence, mortality, and disability-adjusted life years (DALYs) for the five PSDs were extracted from the Global Burden of Disease Study 2021. Age-standardized rates for prevalence (ASPR), incidence (ASIR), mortality (ASMR), and DALYs (ASDR) were calculated. The Bayesian age-period-cohort (BAPC) model was applied to forecast trends up to 2030.<strong>Results</strong>In 2021, ASDRs per 100,000 population were 43.79 for PUD, 7.68 for IBD, 7.42 for AN, 22.18 for BN, and 35.12 for GERD. Projections indicate stable ASIR and ASPR for PUD and IBD, with declines in ASMR and ASDR. AN and GERD metrics are expected to remain stable, while BN shows an increasing trend across all indicators, suggesting a rising disease burden.<strong>Conclusion</strong>Digestive-related PSDs remain a significant health challenge in China. Advances have reduced PUD’s impact, but other conditions require strengthened multidisciplinary management. Enhanced government and health system strategies are critical to mitigate the social and economic impacts of these disorders.