Disparities in the Incidence and Prevalence of Psychotic Disorders Between With and Without Disabled

Abstract Background Numerous epidemiological studies on psychotic disorders have been conducted, however, most of the studies were conducted from an etiological perspective, and conducted with small sample sizes relatively few focused on all types of disabled, especially with a long observation period. Moreover, no study has included the whole adult population of a country. Methods This study was conducted using a data set linking the Korean National Health Insurance Service database, and disability registration data. Age-standardized incidence or prevalence rates were calculated during 2008-2017 according to the presence, severity, and type of the disability. Factors associated with psychotic disorders were examined by multivariate logistic regression. Results The age-standardized incidence and prevalence of psychotic disorders was higher among the disabled than among those without disabled across all years, especially those with severe disabled, and intellectual disabled. The gap in the prevalence of psychotic disorders between the disabled and the non-disabled has widened over time. The severe disabled and intellectual disabled showed the strongest associations with the incidence(aOR=3.04,95% CI = 2.93-3.15;aOR=6.18, 95% CI = 5.90-6.47) and prevalence(aOR=7.64,95% CI = 7.58-7.69;aOR=53.62, 95% CI = 53.04-54.22) of psychotic disorders. Conclusions The incidence and prevalence of psychotic disorders were higher in people with disabled, especially those with severe disabled, and intellectual disabled. The government must increase effort to narrow the gap between the non-disabled and disabled. Financial support: This research was supported by the Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Education (No. 2022R1I1A3070074, and 2022R1I1A1A01068449), and a grant of Patient-Centered Clinical Research Coordinating Center funded by the Ministry of Health & Welfare, Republic of Korea (No. HC23C016500). Key messages • The incidence and prevalence of psychotic disorders were higher in the disabled, especially severe disabled, and intellectual disabled. • Important reasons for these finding may be the ‘low socioeconomic status’ and ‘mental health’ of the disabled.