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Table 2 Key study outcomes among completer sample, by intervention group, at baseline, 3-month follow-up (FU3) and 12-month follow-up (FU12)

From: 12-month follow-up of an exploratory ‘brief intervention’ for high-frequency cannabis users among Canadian university students

Measure Group N Mean (95 % CI)
Baseline FU 3 FU 12
Number of days cannabis used Cannabis 40 24.0 (22.2-25.8) 23.1 (20.7-25.5) 22.3 (19.8-24.8)
Health 32 23.9 (21.8-26.0) 23.1 (20.6-25.5) 22.1 (18.9-25.3)
Number of cannabis use episodes/day Cannabis 40 2.3 (1.7-2.9) 2.4 (1.8-3.0) 2.6 (1.6-3.7)
  Health 32 2.0 (1.7-2.3) 2.4 (1.5-3.4) 2.2 (1.7-2.6)
    Proportion Responding YES
   N Baseline FU 3 FU 12
Deep inhalation/ breathholding Cannabis* 40 78 % 52 % 57 %
Health 32 81 % 78 % 68 %
Driving after cannabis use Cannabis* 40 44 % 31 % 24 %
  Health 32 30 % 27 % 24 %
  1. * Significant change over periods (p < .05).