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Table 1 Baseline characteristics stratified by study condition (N = 620)

From: Screening and concurrent brief intervention of conjoint hazardous or harmful alcohol and tobacco use in hospital out-patients in Thailand: a randomized controlled trial

  Intervention (Tobacco plus alcohol) (n = 215) Control (Tobacco) (n = 199) Control (Alcohol) (n = 206) Statistics P-value
  N (%) or M (SD) N (%) or M (SD) N (%) or M (SD) χ2 or F or t  
Sociodemographic variables
Gender (N, % male) 210 (99.7) 191 (96.0) 205 (99.5) 5.74; df = 2 0.056
Age in years (M, SD) (range 18–60 years) 33.4 (10.8) 30.7 (10.9) 36.8 (11.0) 15.74; df = 2 <0.001
Education
Primary or less 112 (52.3) 108 (54.8) 111 (53.9) 2.56; df = 4 0.690
Secondary 93 (43.5) 77 (39.1) 80 (38.8)
Postsecondary 9 (4.2) 12 (6.1) 15 (7.3)
Marital status
Never married 60 (28.0) 46 (23.4) 48 (23.3) 6.47; df = 4 0.126
Married or cohabiting 140 (65.4) 146 (74.1) 150 (72.8)
Separated/Divorced/Widowed 14 (6.5) 5 (2.5) 8 (3.9)
Religious affiliation: Buddhist (vs. others) 213 (99.1) 196 (98.5) 205 (99.5) 2.17; df = 2 0.711
Employed (vs. unemployed or other) 205 (95.8) 176 (89.3) 196 (95.6) 9.16; df = 2 0.011
Monthly income
<10000 Baht 67 (31.3) 58 (29.4) 45 (22.0) 6.78; df = 4 0.164
10000-15000 Baht 84 (39.3) 71 (36.0) 93 (45.4)
>15000 Baht 63 (29.4) 68 (34.6) 67 (32.7)
Tobacco and alcohol use
Tobacco use (ASSIST score) (M,SD) 19.2 (4.4) 21.9 (3.6) 19.3 (4.4) 27.77; df = 2 <0.001
Alcohol use (ASSIST score) (M,SD) 16.9 (4.6) 16.2 (4.3) 17.2 (3.9) 2.86; df = 2 0.050
Past week tobacco use (units) 78 (52) 66 (49) 70 (48) 3.58; df = 2 0.032
Past week alcohol use (units) 22 (27) 19 (22) 21 (22) 1.03; df = 2 0.350
Other substance use (any frequency in the past 3 months)
Cannabis 1 (0.5) 1 (0.5) 1 (0.5)   
Cocaine 0 0 0   
Amphetamine 0 1 (0.5) 0   
Solvents 0 0 0   
Diazepam or sleeping pills 2 (0.9) 0 0   
Hallucinogens 0 0 0   
Opium 0 0 0   
Other addictive substances 1 (0.5) 0 0   
  1. M Mean; SD Standard Deviation; df degree of freedom; χ2 Chi-square