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Table 4 Baseline and 7-week follow-up alcohol consumption outcomes, comparing intervention groups to controls a

From: Mobile phone brief intervention applications for risky alcohol use among university students: a randomized controlled study

Measures of alcohol consumption in means (SD) Control PartyPlanner (n = 153) PartyPlanner compared to Controlalinear mixed models Promillekoll (n = 341) Promillekoll compared to Controlalinear mixed models
Baseline (n = 489) Follow-up (n = 489) Baseline Follow-up Time x Group p-value Baseline Follow-up Time x Group p-value
Quantity (standard glasses/week) 9.146 (6.178) 8.619 (6.281) 8.570 (6.122) 8.317 (6.449) 0.816 9.617 (6.263) 9.746 (7.053) 0.411
Frequency (drinking occasions/week) 2.288 (1.191) 2.152 (1.192) 2.165 (1.122) 2.171 (1.232) 0.225 2.242 (1.196) 2.362 (1.234) < 0.001
Binge occasions (no per week) 0.971 (0.852) 0.897 (0.838) 0.880 (0.760) 0.791 (0.822) 0.507 1.082 (0.875) 1.018 (0.837) 0.629
eBACb/week 0.017 (0.015) 0.016 (0.015) 0.016 (0.013) 0.015 (0.016) 0.914 0.017 (0.014) 0.017 (0.018) 0.750
Peak eBACc/month 0.128 (0.082) 0.118 (0.080) 0.126 (0.087) 0.122 (0.096) 0.649 0.108 (0.087) 0.119 (0.084) 0.776
  1. aAnalyses comparing the two intervention groups to controls included only individuals who reported actually using the assigned app. Analyses were controlled for the number of times participants reported using the app, previous use of the publicly available Promillekoll app, and self-reports on having spoken to someone in the past 12 months about their alcohol use.
  2. bEstimated average percentage BAC for the week.
  3. cEstimated average peak percentage BAC during the past month.