The factor structure of the Centre for Epidemiological Studies Depression Scale (CESD-R-20) among South African antiretroviral therapy users

Abstract

Depression is a significant concern for people living with HIV and AIDS as it is associated with negative health outcomes and suboptimal adherence to antiretroviral therapy (ART). To this extent, screening for depression is essential for early detection. The CESD-R-20 is a revised four-factor questionnaire developed to assess depressive symptoms in adults. This study explored the factor structure and psychometric properties of the CESD-R-20 among 685 individuals receiving ART. Data were collected at the Infectious Diseases Clinic of a large public hospital outside Cape Town from participants who had been receiving ART for at least six months. Exploratory factor analysis (EFA) of the CESD-R-20 was performed to identify its underlying factor structure. The EFA revealed a one-factor solution termed "depressive affect," comprising 19 items that encompassed the original factors. This finding suggests that depression is a cohesive construct rather than a collection of interconnected dimensions. The scale exhibited high internal consistency (Cronbach's alpha = 0.95) among the sample of persons living with HIV and AIDS. Our findings indicate that the CESD-R-20 can effectively measure depressive affect as a one-factor scale in South Africans receiving ART. The scale demonstrated strong internal consistency and is suitable for screening for depressive symptoms among persons living with HIV and AIDS.