Table 2.
Baseline characteristics of participants in Internet-based therapy (IT) and Internet-based self-help (IS).
| Characteristic | IT (n = 68) | IS (n = 68) |
t
134/ Fisher exact test |
P value | ||
| Women, n (%) | 35 (51%) | 35 (51%) | 0.00 | 1.00 | ||
| Age (years), mean (SD) | 41.9 (10.1) | 41.1 (9.6) | 0.49 | .63 | ||
| Education, n (%) a | 4.49 | .10 | ||||
| Low | 2 (3%) | 7 (11%) | ||||
| Medium | 24 (38%) | 30 (46%) | ||||
| High | 38 (59%) | 29 (44%) | ||||
| Employed, n (%) | 58 (85%) | 55 (82%) | 0.25 | .65 | ||
| Residential urbanization level, n (%) | 0.74 | .75 | ||||
| Low | 9 (13%) | 6 (9%) | ||||
| Medium | 21 (31%) | 22 (32%) | ||||
| High | 37 (55%) | 40 (59%) | ||||
| AUDITb composite score, mean (SD) | 18.8 (4.8) | 19.6 (5.6) | 0.98 | .33 | ||
| Duration of alcohol problems (years), mean (SD) | 5.2 (5.7) | 5.4 (5.7) | 0.23 | .82 | ||
| Drinks per week, mean (SD) | 45.2 (26.3) | 43.4 (24.0) | 0.38 | .71 | ||
| EQ-5Dc score | 0.79 (0.20) | 0.80 (0.18) | 0.32 | .75 | ||
| Work absenteeismd | 756 (2289) | 1863 (6983) | 1.24 | .22 | ||
| Work presenteeismd | 1137 (2386) | 794 (1922) | 0.78 | .44 | ||
a Classified according to Statistics Netherlands (CBS) and International Standard Classification of Education 1997.
b Alcohol Use Disorders Identification Test [15].
c 5-dimensional EuroQol instrument, score calculated using the measurement and valuation of health (MVH-A1) algorithm from Dolan [29].
d Averaged costs over the 6 months preceding baseline measurement.