Increase in child behavior problems among urban Brazilian 4-year olds: 1993 and 2004 Pelotas birth cohorts.
Bottom Line: We found a significant increase in CBCL total problems, internalizing and externalizing mean scores over the 11-year period.For 1993 and 2004 Pelotas cohorts, respectively, CBCL mean values (SE) total problems scores were 27.9 (0.8) and 34.7 (0.3); for internalizing scores, 5.7 (0.2) and 6.3 (0.1) and for externalizing scores, 12.4 (0.4) and 15.5 (0.1).After adjusting for confounding variables, the largest increase from 1993 to 2004 was identified in the aggressive behavior syndrome score (Cohen's d = .50), followed by the externalizing problem score (Cohen's d = .40) and CBCL total problem score (Cohen's d = .36), respectively.
Affiliation: Postgraduate Program in Epidemiology, Federal University of Pelotas, Pelotas, Brazil; Department of Preventive Medicine, School of Medicine, University of São Paulo, São Paulo, Brazil.Show MeSH
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Mentions: Changes in CBCL scores between the 1993 and 2004 cohorts are presented in Figures1 and 2 (among girls and boys, respectively). Substantial increases were detected in mean CBCL total problems, internalizing and externalizing mean scores (approximately 25%, 10%, and 25%, respectively). Increases were also identified in mean somatic complaints, thought problems (only among girls), and aggressive behavior syndrome scores. Interestingly, there was a reduction in attention problem mean scores over the study period (approximately 21%). There were no significant differences in the withdrawn, anxious/depressed, social problems, and rule-breaking behavior syndrome scores between the two cohorts.
Affiliation: Postgraduate Program in Epidemiology, Federal University of Pelotas, Pelotas, Brazil; Department of Preventive Medicine, School of Medicine, University of São Paulo, São Paulo, Brazil.