Fig. 1From: Predictors of cannabis and tobacco co-use in youth: exploring the mediating role of age at first use in the population assessment of tobacco health (PATH) studySignificant indirect effects are also present for Internalizing (B = 0.18), Externalizing (B = 0.33) and sensation seeking (B = 0.10), p < 0.05. Estimates are in parentheses. Relationships between youth factors and lifetime tobacco and cannabis use mediated by age at first use of tobacco or cannabisBack to article page