Figure 1.
Adjusted within-time associations between marijuana and cigarette use across three developmental periods. Full sample.
MJ(#) = Marijuana Use Frequency (Age); CIG (#) = Conventional Cigarette Smoking Frequency (Age)
Note: All presented standardized coefficients were significant at p < .05*. Included, but not depicted in the model, were time-fixed covariates: childhood attention problems, gender, race, socioeconomic status in childhood.