Fig. 3From: Incorporating environmental variables as precursor background variables of the theory of planned behavior to predict quitting-related intentions: a comparative study between adult and young adult smokersPath coefficients for a model predicting intention to quit among university student smokers (N = 379): Indiana, United States, 2009 Note: The effects of precursor background variables on three global constructs of the theory of planned behavior (i.e., attitude, subjective norm, and perceived behavioral control) were adjusted for age, sex, and race/ethnicity. b reference category is attending university without comprehensive smoke-free air law. * p < .05, ** p < .01Back to article page