Racial and ethnic differences in comorbid psychosis: a population-based study

Area of Science:

• Psychiatry
• Epidemiology
• Health Disparities

Background:

• Racial and ethnic variations in psychiatric condition prevalence, including psychosis, are documented.
• Existing research highlights differing comorbidity patterns for psychosis across racial and ethnic groups.
• However, the consistency of these differences specifically for comorbid psychosis remains unclear.

Purpose of the Study:

• To investigate the association between race/ethnicity and comorbid psychosis.
• To analyze differences in comorbid psychosis prevalence across White, Asian, Hispanic, and Black American adults.

Main Methods:

• Utilized self-reported diagnostic data from the Collaborative Psychiatric Epidemiology Surveys (CPES) (N ≈ 11,844).
• Categorized comorbid psychosis into four levels: no mental illness/psychosis, mental illness only, psychosis only, and comorbid psychosis (psychosis + mental illness).
• Employed chi-square tests and multinomial logistic regression, adjusting for demographics (education, sex, income, age).

Main Results:

• Hispanic and Asian participants had significantly lower odds of comorbid psychosis compared to White participants (AORAsian = 0.32, AORHispanic = 0.66).
• No significant association was found for comorbid psychosis in Black participants relative to White participants (AORBlack = 0.91).
• Hispanic and Black participants were more likely to report psychosis alone compared to White participants (AORHispanic = 1.94, AORBlack = 1.86).

Conclusions:

• Observed distinct racial and ethnic patterns for psychosis and comorbid psychosis.
• Lower prevalence of comorbid psychosis in non-White groups may indicate underdiagnosis or underreporting of other mental disorders.
• Highlights the need for culturally sensitive diagnostic practices and further research into the etiology of these disparities.