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According to results of a multiple linear regression analysis, among adolescents in the main partner group, being older and living with a partner were negatively associated with the proportion of sex acts that were protected, while using alcohol or marijuana, having positive attitudes toward condoms and perceiving that main partners would react positively toward condoms were associated with using condoms in a higher proportion of sex acts. Multiple linear regression analysis (Proc REG procedure in SAS, version 8. Total energy intake (in kJ per day) was included in the multiple linear regression analysis to adjust for possible systematic over or under reporting of dietary intake (28). |
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