Figure 1 shows the results of the main effect model used to test for the contribution of effortful control to the progression from tobacco use in adolescence to problematic tobacco use in early adulthood, controlling for exposure to substance-using friends. Except for a significant χ2 value, fit indices for this model were adequate: χ2(84) = 310.50, p<0.001, CFI = 0.93, RMSEA = 0.05 (90% C.I. = 0.05 to 0.06), SRMR = 0.05.
