title: Psychometric properties and Confirmatory structure of the Strengths and difficulties questionnaire in a sample of adolescents in Nigeria.
abstract: Though the SDQ has been used in selected studies in Nigeria, its theoretical structure has not been fully and appropriately investigated in the setting. The present study employs Exploratory Factor Analysis (EFA) and Confirmatory Factor Analysis (CFA) to investigate the theoretical structure of the self-reported version of the SDQ in a sample of adolescents in Benue state, Nigeria. A total of 1,244 adolescents from different categories of secondary schools in Makurdi and Vandekya Local government areas of Benue state participated in the study. Preliminary data analyses were performed using descriptive statistics while the theoretical structure of the SDQ was assessed using EFA and CFA. Model fits were assessed using Chi-square test and other fit indices at 5% significance level. Participants were 14.19±2.45 (Vandekya) and 14.19±2.45 (Makurdi) years old. Results of the EFA and CFA revealed a 3-factor oblique model as the best model for the sample of adolescents studied (χ2/df=2.20, p<0.001) with all fit indices yielding better results. A correlated 3-factor model fits the present data better than the 5-factor theoretical model of the SDQ. The use of the original 5-factor model of the SDQ in the present setting should be interpreted with caution.
authors.affiliation: Department of Epidemiology and Medical Statistics, College of Medicine, University of Ibadan.
authors.forename: Onoja M
authors.initials: OM
authors.lastname: Akpa
authors.affiliation: Department of Epidemiology and Medical Statistics, College of Medicine, University of Ibadan.
authors.forename: Rotimi F
authors.initials: RF
authors.lastname: Afolabi
authors.affiliation: Department of Epidemiology and Medical Statistics, College of Medicine, University of Ibadan.
authors.forename: Kayode R
authors.initials: KR
authors.lastname: Fowobaje
keywords: Adolescents; Confirmatory factor analysis; Exploratory factor analysis; Factor structure; Strengths and difficulties questionnaire