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Table 1 Baseline sample characteristics of participants by intervention condition

From: Preliminary study of alcohol problem severity and response to brief intervention

Variable
Mean (standard deviation)
Total sample (N = 51) Brief intervention group (n = 27) Control group (n = 24) Sign. (p-value)
Age (years) 34.6 (12.4) 35.3 (13.7) 33.9 (11.0) 0.680
Sex (% male) 56.9% 55.6% 58.3% 0.842
Education (years) 15.1 (1.9) 15.3 (2.0) 15.0 (1.8) 0.528
Drinks per day (past month) 3.3 (1.8) 3.5 (2.6) 3.2 (1.7) 0.573
Drinks per drinking day (past month) 5.5 (2.0) 5.5 (2.3) 5.5 (1.6) 0.878
% Days abstinent (past month) 40.7% (23.8) 37.4% (25.7) 44.3% (21.3) 0.306
DSM-5 AUD symptoms (total count) 4.1 (2.5) 4.1 (2.5) 4.1 (2.7) 0.985
Alcohol Use Disorders Identification Test (total score) 17.5 (7.4) 17.6 (7.2) 17.5 (7.7) 0.935
Penn Alcohol Craving Scale (total score) 19.8 (6.6) 19.9 (6.7) 19.6 (6.7) 0.874
% Cigarette use (past month) 45.1% 44.4% 45.8% 0.921
% Positive THC screen (urine drug test) 27.5% 30.0% 25.0% 0.712
Patient Health Questionnaire-9 (total score) 5.4 (5.1) 5.3 (5.1) 5.4 (5.3) 0.977
Generalized Anxiety Disorder 7-Item Scale (total score) 4.0 (5.0) 3.7 (5.0) 4.4 (5.2) 0.620
  1. A heavy drinking day is defined as ≥ 4 drinks consumed for females or ≥ 5 drinks for males; alcohol and cigarette use variables were determined using past-month Timeline FollowBack interview; AUD symptom count assessed via the Structured Clinical Interview for DSM-5; chi-square or independent samples t-tests assessed for baseline characteristic differences between conditions