Table 2.
Stair climbing (count/day/100 employees) at the intervention site compared to the control site for each study period
| Period | Number of days analyzed | Intervention site | Control site | Intervention effecta | p* | p** | ||
|---|---|---|---|---|---|---|---|---|
| Mean ± SE | Δ (95 % CI) | Mean ± SE | Δ (95 % CI) | |||||
| Baseline | 15 | <0.001 | ||||||
| Intervention 1 | 19 | 12.1 ± 0.6 | 1.5 (-0.1;3.2) | 20.2 ± 0.6 | 0.4 (-1.2;2.0) | 1.1 (-1.2;3.4) | 0.359 | |
| Short-term follow-up 1 | 15 | 11.7 ± 0.6 | 1.1 (-0.6;2.9) | 20.9 ± 0.6 | 1.1 (-0.7;2.8) | 0.1 (-2.4;2.5) | 0.943 | |
| Intervention 2 | 20 | 12.6 ± 0.5 | 2.0 (0.4;3.6) | 17.2 ± 0.5 | -2.6 (-4.3;-1.0) | 4.6 (2.3;6.9) | <0.001 | |
| Short-term follow-up | 15 | 11.5 ± 0.6 | 1.0 (-0.8;2.7) | 19.2 ± 0.6 | -0.6 (-2.3;1.1) | 1.6 (-0.9;4.0) | 0.211 | |
| Medium-term follow-up | 15 | 11.1 ± 0.6 | 0.5 (-1.2;2.2) | 17.9 ± 0.6 | -1.9 (-3.6;-0.2) | 2.4 (0;4.9) | 0.055 | |
| Long-term follow-up | 15 | 10.8 ± 0.6 | 0.2 (-1.5;1.9) | 17.1 ± 0.6 | -2.7 (-4.5,-1.0) | 2.9 (0.5;5.4) | 0.019 | |
All estimates were from the linear mixed regression model, using site and study period as fixed effects
95 % CI confidence interval at 95 %, SE standard error
Δ estimated mean change between baseline and the study period
a estimated effects in intervention site compared with the control site
*p-value from the interaction effects (i.e. test of difference in change for intervention versus control at each period)
**p-value from the overall interaction effect (i.e. test of difference in change for intervention versus control over time)