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Table 2 Baseline characteristics of participants

From: The efficacy of a blended motivational interviewing and problem solving therapy intervention to reduce substance use among patients presenting for emergency services in South Africa: A randomized controlled trial

  Total (N = 335) Control (N = 110) MI (N = 113) MI-PST (112)
Age (Mean, range) 28 (18–75) 27 (18–75) 28 (18–65) 28.5 (18–61)
Gender     
 Male N (%) 218 (65.5) 68 (62.4) 71 (63.4) 79 (70.5)
 Female N (%) 115 (34.5) 41 (37.6) 41 (36.6) 33 (29.5)
Race
 Black N (%) 195 (58.2) 58 (53.7) 68 (60.7) 69 (61.6)
 Coloured N (%) 135 (40.7) 49 (45.4) 44 (39.30 42 (37.5)
 White/Asian N (%) 2 (0.6) 1 (0.9) 0 1 (0.9)
Marital Status
 Single N (%) 272 (82.9) 91 (85.8) 89 (80.2) 92 (82.9)
 Married or attached N (%) 56 (17.1) 14 (14.2) 22 (19.8) 19 (17.1)
Education
 Did not finish high school N (%) 168 (50.1) 58 (52.7) 56 (49.6) 54 (48.2)
 Finished high school N (%) 167 (49.9) 52 (47.30 57 (50.4) 58 (51.8)
Employment
 Employed N (%) 147 (44.4) 45 (41.3) 46 (40.7) 56 (51.4)
 Unemployed N (%) 184 (55.6) 64 (58.7) 67 (59.3) 53 (48.6)
Presented with Injury
 Yes 242 (72.2) 78 (70.9) 82 (72.6) 82 (73.2)
 No 93 (27.8) 32 (29.1) 31 (27.4) 30 (26.8)
Intent of Injury
 Intentional N (%) 185 (76.5) 49 (62.0) 43 (52.4) 46 (56.1)
 Non-intentional (N (%) 57 (23.5) 20 (38.0) 39 (47.6) 36 (32.1)
Under the influence when injured
 Yes N (%) 197 (59.2) 70 (63.6) 72 (64.9) 57 (50.9)
 No N (%) 136 (40.8) 40 (36.4) 39 (35.1) 55 (49.1)
Substance Use Involvement Score (Total) 19 (6–38) 19 (7–35) 19.75 (6.57) 18 (6–35)
 Alcohol (n = 286) 19 (10–38) 19 (10–30) 20 (10–38) 17 (10–30)
 Dagga (n = 24) 20.5 (8–35) 21.5 (12–27) 18.09 (7.9) 19.9 (10.1)
 Cocaine (n = 1) 26 (26–26) n/a n/a n/a
 Methamphetamine (n = 20) 23.5 (6–35) 19 (7–35) 27 (17–32) 23.3 (9.98)
 Mandrax (n = 4) 9.5 (6–23) 23 (23–23) 6 (6–13) n/a