Table 2

Treatment response and odds ratios for the three subgroups resulting from classification tree analysis
Subgroup
Characteristic I (n = 31) II (n = 29) III (n = 76) F / Fisher’s exact p
Living alone 31 (100%) 0 (0%) 0 (0%) 134.564 0.000*
Interpersonal sensitivity 0.98 (0.63) 1.83 (0.53) 0.52 (0.32) 85.548 0.000*
Hostility 0.68 (0.59) 1.04 (0.67) 0.48 (0.42) 11.863 0.000*
Cognitive working ability 3.40 (0.77) 3.07 (0.88) 3.68 (0.70) 7.028 0.001*
Treatment response 8 (26%) 21 (72%) 31 (41%) 13.884 0.001*
IT intervention 14 (45%) 16 (55%) 38 (50%) 0.618 0.716
Treatment response (OR [95% CI]) 0.50 [0.20, 1.27] 3.81 [1.50, 9.67] 1
Women 16 [52%] 15 (52%) 39 (51%) 0.038 1.000
Age 41.5 (11.4) 40.7 (9.4) 41.8 (9.4) 0.140 0.870
Education 4.468 0.336
 Low 2 (7%) 4 (14%) 3 (4%)
 Medium 15 (50%) 11 (39%) 28 (39%)
 High 13 (43%) 13 (46%) 41 (57%)
Employed 24 (77%) 23 (82%) 66 (87%) 1.662 0.413
Residential urbanization level 3.923 0.419
 Low 3 (10%) 5 (17%) 7 (9%)
 Medium 7 (23%) 11 (38%) 25 (33%)
 High 21 (68%) 13 (45%) 43 (57%)
AUDIT composite score 18.5 (5.8) 20.9 (4.4) 18.9 (5.2) 1.859 0.160
Years of alcohol problems 4.2 (4.7) 6.6 (6.8) 5.3 (5.6) 1.291 0.278
Drinks per week 40.6 (25.9) 48.1 (23.5) 44.2 (25.4) 0.666 0.516
Drinking days per week 5.7 (2.0) 5.9 (1.7) 5.8 (1.8) 0.059 0.943
Cannabis lifetime use 11 (36%) 8 (28%) 31 (41%) 1.556 0.443
Cocaine lifetime use 2 (7%) 8 (28%) 18 (24%) 5.512 0.061
Amphetamine lifetime use 3 (10%) 6 (21%) 17 (22%) 2.335 0.323
QOLS composite score 69.8 (17.0) 64.4 (15.2) 76.4 (17.3) 5.726 0.004
EQ-5D score 0.76 (0.23) 0.72 (0.27) 0.84 (0.12) 4.859 0.009
BSI global severity index 0.88 (0.48) 1.39 (0.40) 0.53 (0.31) 47.790 0.000*

Presented data are counts (%) or mean (SD) unless indicated otherwise; OR [95% CI] indicates odds ratios and their respective 95% confidence interval [lower, upper]. Subgroup III is the reference category; Education classification according to International Standard Classification of Education standard [34]; AUDIT = Alcohol Use Disorders Identification Test; QOLS = Flanagan Quality of Life Scale; EQ-5D = 5 dimensional EuroQol instrument, score calculated using the MVH-A1 algorithm from Dolan [35]; BSI = Brief Symptom Inventory; * Significant at α = 0.05 level, after Bonferroni correction for 21 variables in this table: corrected α = 0.05 / 21 = 0.0024.

Blankers et al.

Blankers et al. BMC Public Health 2013 13:455   doi:10.1186/1471-2458-13-455

Open Data