ABSTRACT
OBJECTIVES. This study examined the factor structure of the self-report Strengths and Difficulties Questionnaire, paying special attention to the number of factors and to negative effects of reverse-worded items and minor factors within the subscales on model fit. Furthermore, factorial invariance across gender, age, level of education, and ethnicity was investigated. DESIGN. Data were obtained from the Youth Health Monitor Rotterdam, a community-based health surveillance system. METHODS. The sample consisted of 11,881 pupils of 11-16 years old. Next to the original five-factor model, a factor model with the number of factors based on parallel analysis and scree test was investigated. Confirmatory factor analysis for ordered-categorical measures was applied to examine the goodness-of-fit and factorial invariance of the factor models. RESULTS. After allowing reverse-worded items to cross-load on the prosocial behaviour factor and adding error correlations, a good fit to the data was found for the original five-factor model (emotional symptoms, conduct problems, hyperactivity-inattention, peer problems, prosocial behaviour) and a model with four factors (emotional symptoms and peer problems, conduct problems, hyperactivity-inattention, prosocial behaviour). Factorial invariance across gender, age, level of education, and ethnicity was found for the final five- and four-factor model, except for the prosocial factor of the four-factor model that showed partial invariance across gender. Conclusions. While support was found for both models, the final five-factor model is theoretically more plausible and gained additional support as the original scales emotional problems and peer problems showed different relations with gender, educational level, and ethnicity.
Subject(s)
Mass Screening , Mental Disorders/diagnosis , Surveys and Questionnaires , Adolescent , Affective Symptoms/diagnosis , Affective Symptoms/psychology , Age Factors , Attention Deficit Disorder with Hyperactivity/diagnosis , Attention Deficit Disorder with Hyperactivity/psychology , Child , Conduct Disorder/diagnosis , Conduct Disorder/psychology , Factor Analysis, Statistical , Female , Humans , Male , Mental Disorders/psychology , Netherlands , Peer Group , Psychometrics/statistics & numerical data , Reference Values , Reproducibility of Results , Sex Factors , Social BehaviorABSTRACT
PURPOSE: To contribute to a further exploration of the association of psychosocial well-being with overweight and weight perception among young Dutch adolescents. METHODS: Data from the ongoing Rotterdam Youth Health Monitor were used from 1,923 9-10-year-olds and 3,841 12-13-year-olds. The association of mental health indicators with weight status based on self-report and measured height and weight was studied with logistic regression analyses in both age groups cross-sectionally. Additional longitudinal analyses were conducted among the 787 pupils for whom follow-up data were available. Interactions with gender and ethnic background were explored. Among the 12-13-year-olds, the role of weight perception was also studied. RESULTS: We found that 9-10-year-old obese boys scored more favourably on social anxiety than nonoverweight boys. Among 12-13-year-olds body weight perception, rather than self-reported or measured weight status was associated with mental health indicators. Mental health indicators at age 9-10 years did not predict self-reported weight status at age 12-13 or change in weight status between 9-10 and 12-13 years, nor did weight status at age 9-10 years predict later mental health indicators or change in these indicators. CONCLUSIONS: This study provides no evidence that overweight does coincide with less favorable psychological well-being in young adolescents. In 12-13-year-old adolescents, feeling overweight, rather than being overweight, appears to be important.
