• Boys had a higher prevalence rates of externalizing behaviors than girls. • Correlates were found from personal, family and school dimensions. • Grade 11 was the peak of reported problem behaviors in the secondary school years. • Four significant interactions were found between gender and examined correlates. • Gender-specific design and school-home collaboration to impart PYD were suggested. This study aimed to test whether there are gender differences in the prevalence of and correlates for various externalizing problem behaviors among secondary school adolescents in a southern city of China. A large cross-sectional sample survey of 12,244 adolescents from Grade 7 to Grade 12 was conducted in Shenzhen, a metropolis in southern China. The participants completed measures assessing externalizing behaviors, positive youth development (PYD), family functioning, school maladjustment and sociodemographic characteristics. Multiple liner regression analyses were performed to identify factors associated with externalizing problem behaviors among participants. The results showed that (1) 35.1% of the sample displayed at least one externalizing problem behavior (i.e. alcohol consumption, tobacco use, running away from home, truancy, gang fighting, and stealing) during the previous year. Boys were more likely than girls to engage in all the examined behaviors. (2) Grade 11 was the peak of reported problem behaviors in the secondary school years and there was no difference between scores from participants in Grade 9 and Grade 7. (3) Having siblings, male gender, lower positive youth development level, lack of an intact family, lower family functioning, and school maladjustment were statistically significantly associated with more externalizing problem behaviors. (4) Four significant interactions were found between gender and Grade 11, gender and Grade 12, gender and PYD, and gender and school maladjustment. Boys in Grades 11 and 12, and with school maladjustment, and girls with lower PYD were more likely to report externalizing behaviors. The findings suggest that greater focus should be placed on late adolescent boys who have school difficulties, girls with low PYD levels, and adolescents with sibling(s), who are from non-intact families or who live in poor family environments, to prevent or intervene in the possibility of developing externalizing problem behaviors. Further Prevention and intervention work may require gender-specific design and school-home collaboration to impart positive youth qualities among adolescents.
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