Predictors of consistent condom use based on the Information-Motivation-Behavior Skill (IMB) model among senior high school students in three coastal cities in China

BACKGROUND High prevalence of risky sexual behaviors and lack of information, skills and preventive support mean that, adolescents face high risks of HIV/AIDS. This study applied the information-motivation-behavioral skills (IMB) model to examine the predictors of consistent condom use among senior high school students from three coastal cities in China and clarify the relationships between the model constructs. METHODS A cross-sectional study was conducted to assess HIV/AIDS related information, motivation, behavioral skills and preventive behaviors among senior high school students in three coastal cities in China. Structural equation modelling (SEM) was used to assess the IMB model. RESULTS Of the 12313 participants, 4.5% (95% CI: 4.2-5.0) reported having had premarital sex and among them 25.0% (95% CI: 21.2-29.1) reported having used a condom in their sexual debut. Only about one-ninth of participants reported consistent condom use. The final IMB model provided acceptable fit to the data (CFI = 0.981, RMSEA = 0.014). Consistent condom use was significantly predicted by motivation (β = 0.175, P < 0.01) and behavioral skills (β = 0.778, P < 0.01). Information indirectly predicted consistent condom use, and was mediated by behavioral skills (β = 0.269, P < 0.05). CONCLUSIONS The results highlight the importance of conducting HIV/AIDS preventive health promotion among senior high school students in China. The IMB model could predict consistent condom use and suggests that future interventions should focus on improving motivation and behavioral skills.