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Table 2 Baseline characteristics for participants completing follow-up (“completers”) compared to participants who did not (“attrition group”)

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

  Completers (n = 1361) Attrition group (n = 568) p-valuesa
Gender: M (%)/F (%) 646(47.5)/715(52.5) 285(50.2)/283(49.8) 0.277
Age: mean (SD) 24.840 (4.931) 24.420 (4.493) 0.078
Measures of alcohol consumption: means (SD)    
AUDIT score (scale 0–40) 10.444 (3.716) 11.169 (4.257) < 0.001
Quantity (standard glasses/week) 8.812 (5.696) 10.333 (7.398) < 0.001
Frequency (drinking occasions/week) 2.213 (1.139) 2.405 (1.253) 0.002
Binge occasions (no. per week) 0.950 (0.807) 1.109 (0.951) < 0.001
Average eBACb per week 0.161 (0.133) 0.198 (0.187) < 0.001
Peak eBACc within past month 1.240 (0.760) 1.319 (0.897) 0.063
Percent (%) over weekly recommended levels 27.4 35.2 0.001
  1. aP-values are based on student’s t-test for age, AUDIT, quantity, frequency, binge occasions, average eBAC, and peak eBAC; Pearson’s chi-square was used for gender and % over weekly recommended level.
  2. bEstimated average percentage BAC per week.
  3. cEstimated average peak percentage BAC during the past month.