Table 2:

Comparison of number of days of cannabis use in past month between brief intervention and simple advice group.

Time point comparison (Change in number of days of Cannabis use in past month)	Brief intervention group (n=50)	Simple advice group (n=50)	P-value (comparison of Brief intervention and simple advice based on Mann Whitney U-test)
Baseline	30 (30–30)	30 (30–30)	0.318
4 weeks	25 (22.25–30)	30 (28–30)	<0.001*
8 weeks	26.5 (25–30)	30 (30–30)	0.002*
12 weeks	30 (26.5–30)	30 (30–30)	0.049*
Intra group P value (based on Friedman test)	<0.0001*	0.0003*

Shown as median (inter-quartile range), *P<0.05