Table 1 Baseline characteristics for all subjects, by treatment group
| Ā | Phone n = 462 | Internet n = 464 | Control n = 460 | All n = 1386 |
|---|---|---|---|---|
Male, No. (%) | 321 (69.5) | 302 (65.1) | 306 (66.5) | 929 (67.0) |
Age, mean (SD), y | 43 (8.8) | 43 (8.4) | 43 (8.7) | 43 (8.6) |
BMI (SD), kg/m2 | 29.5 (3.5) | 29.6 (3.4) | 29.6 (3.7) | 29.6 (3.5) |
Highly educated, No. (%)a | 271 (60.1) | 281 (62.2) | 255 (58.8) | 807 (60.4) |
Married/cohabiting, No. (%)a | 380 (84.3) | 384 (85.1) | 368 (84.8) | 1132 (84.7) |
Born in the Netherlands, No. (%)b | 416 (92.7) | 417 (93.3) | 401 (94.1) | 1234 (93.3) |
Medication for certain conditions, No. (%)c | 80 (18.6) | 77 (17.8) | 67 (16.5) | 224 (17.7) |
Smokes ā„ 1 unit/day, No. (%)c | 73 (16.3) | 59 (13.2) | 65 (15.3) | 197 (14.9) |
Weight loss attempts previous 2 yrs, No. (%)e | Ā | Ā | Ā | Ā |
0 attempts | 147 (32.9) | 141 (31.6) | 141 (33.2) | 429 (32.5) |
1 ā 3 attempts | 212 (47.7) | 202 (45.3) | 196 (46.1) | 610 (46.3) |
4 or more attempts | 88 (19.7) | 103 (23.1) | 88 (20.7) | 279 (21.2) |
Tried to prevent weight gain in previous 2 yrs, No. (%)e | 353 (79.1) | 370 (83.0) | 347 (81.5) | 1070 (81.2) |
At baseline wants to, No. (%)e | Ā | Ā | Ā | Ā |
Loose weight | 386 (86.2) | 373 (83.8) | 363 (85.6) | 1122 (85.2) |
Prevent weight gain | 56 (12.5) | 67 (15.1) | 55 (13.0) | 178 (13.5) |
Neither are important | 6 (1.3) | 4 (1.6) | 5 (1.1) | 17 (1.3) |