Table 2 Baseline values for the outcome variables, potential mediators and covariates of the study groups
|  | Web-based computer-tailored intervention (n = 78) | Comparison group (n = 135) |
|---|---|---|
Outcome variable | ||
 Workplace sitting: mean ± SD minutes/day | 339.1 ± 125.1 | 284.6 ± 61.3*** |
Potential mediators | ||
 Knowledge: mean ± SD | 2.5 ± 0.3 | 2.6 ± 0.4 |
 Attitudes: mean ± SD | 3.9 ± 0.5 | 3.9 ± 0.6 |
 Self-efficacy: mean ± SD | 3.6 ± 0.8 | 3.6 ± 0.8 |
 Social support: mean ± SD | 1.9 ± 1.0 | 1.8 ± 1.0 |
 Intention: n (%) intending to change | 77/78 (98.7) | 135/135 (100) |
 Action planning: n (%) completed | 54/78 (69.2) | / |
Covariates | ||
 Age: mean ± SD years | 40.4 ± 8.7 | 40.4 ± 9.7 |
 Gender: n (%) men | 26/78 (33.3) | 42/135 (31.1) |
 Education: n (%) high school /university | 59/78 (75.6) | 116/135 (85.9) |
 Hours at work per day: mean ± SD | 8.0 ± 0.9 | 8.0 ± 0.6 |
 Employment duration: n (%) > 5 years | 56/78 (71.8) | 93/135 (68.9) |
 BMI: mean ± SD kg/m2 | 24.3 ± 3.1 | 23.7 ± 3.5 |
 Walking: mean ± SD minutes/day | 23.6 ± 31.9 | 25.3 ± 23.5 |
 Moderate-intensity PA: mean ± SD minutes/day | 31.0 ± 33.8 | 23.7 ± 24.8 |
 Vigorous-intensity PA: mean ± SD minutes/day | 10.4 ± 14.5 | 13.6 ± 19.7 |