Reliability analysis of the Malay version of the center for epidemiologic studies-depression scale (CESD) among adolescents in Malaysia

Depression is a common mental disorder that affects many adolescents worldwide. Therefore, there is a need for reliable instruments to screen for depression symptoms among adolescents. This study aims to determine the reliability of the Malay version of the Centre of Epidemiological Studies Depression Scale (CESD) among adolescents in Malaysia. A cross-sectional study was conducted among 65 adolescents ages between 12 and 14 years from two secondary schools in the Federal Territory of Kuala Lumpur from May 2017 to July 2017. Cronbach’s alpha (α), McDonald's omega (ω), Spearman Brown split half reliability (r(SB)), and Intra-class Correlation Coefficient (ICC) were examine to determine the internal consistency and two week test-retest reliability. The overall CESD scale was found to have good internal consistency with α = 0.882 (95% CI 0.837, 0.914), ω = 0.886 (95% CI 0.837, 0.916) and r(SB) = 0.909. The CESD subscales, Somatic symptoms (α = 0.824; 95% CI 0.739, 0.878; ω = 0.828; 95% CI 0.738, 0.885; r(SB) = 0.825), Depressive affect (α = 0.822; 95% CI 0.745, 0.880; ω = 0.834; 95% CI 0.750, 0.884; r(SB) = 0.847) and Positive affect (α = 0.610; 95% CI 0.326, 0.721; ω = 0.612; 95% CI 0.379, 0.723 and r(SB) = 0.608) indicated acceptable to good internal consistency. The 2-week test–retest reliability ICC was 0.926 (95% CI 0.851, 0.961) for the total score reliability. The reliability analysis of the Malay version of CESD shows satisfactory α, ω, r(SB) and ICC values, therefore making it a reliable instrument to screen for depression among adolescents in Malaysia.