Table 2.

Correlations between study variables.

Variables	Age	Education	Days of Cannabis Use †	Days of Urge, Desire or Craving for Cannabis †	Baseline Primary Substance Use ‡	End-of-Treatment Primary Substance Use ‡	Baseline CAPS 1	End-of-Treatment CAPS 1
Age	1	0.101	−0.009	−0.031	−0.011	−0.077	0.006	−0.051
Education		1	−0.114	−0.194	−0.091	0.129	−0.022	−0.001
Days of cannabis use †			1	0.844 **	0.007	0.004	0.069	0.157
Days of urge, desire or craving for cannabis †				1	0.073	−0.028	0.113	0.081
Baseline Primary Substance use ‡					1	0.049	0.094	−0.016
End-of-treatment Primary Substance use ‡						1	0.140	0.370 **
Baseline CAPS							1	0.377 **
End-of-treatment CAPS								1

¹ CAPS = Clinician-Administered PTSD Scale; ** p < 0.01, results are based on 1000 bootstrap samples; ^‡ number of days of primary substance use in past 30 days; ^† number of days of use in the past 7 days.