Table 4.

Means and standard deviations of the frequency of tobacco and cannabis use at baseline (t0) and 8-week (t2) follow-up (descriptive statistics were calculated using the 20 imputed datasets).

Outcome variable	Time points	PE, mean (SD)	NF, mean (SD)	MI, mean (SD)	Total
Tobacco use frequency, cigarettes per day	t0	12.5 (2.4)	12.0 (2.5)	13.6 (2.5)	12.7 (2.5)
	t2	12.5 (2.5)	11.0 (2.5)	13.4 (2.7)	12.3 (2.6)
Cannabis use frequency, times per week	t0	2.5 (1.4)	2.3 (1.4)	2.3 (1.4)	2.3 (1.4)
	t2	2.4 (1.4)	2.2 (1.4)	2.2 (1.4)	2.2 (1.4)