Effect of the intervention on stair use
| Baseline stair use (number of passages per 24 h) | Mean percentage change (95% CI) | |||
|---|---|---|---|---|
| Week days | Weekend days | Intervention period* | After-intervention period* | |
| Overall (crude) | 992±479 | 208±116 | 8.5% (5.8% to 11.1%) | 9.9% (7.3% to 12.6%) |
| Overall (adjusted) † | 11.2% (8.7% to 13.7%) | 10.9% (8.4% to 13.3%) | ||
| Stratified by hospital wing | ||||
| 1st wing | 995±421 | 246±102 | 1.1% (−3.6% to 5.8%) | 6.6% (1.9% to 11.3%) |
| 2nd wing | 1116±589 | 221±146 | 15.8% (11.9% to 19.8%) | 15.3% (11.4% to 19.2%) |
| 3rd wing | 869±384 | 158±79 | 8.5% (4.4% to 12.6%) | 7.8% (3.7% to 11.9%) |
| Stratified by floor level | ||||
| Level 0 to 1 | 880±268 | 189±93 | 3.4% (−2.2% to 9.0%) | 5.1% (−0.6% to 10.7%) |
| Level 1 to 2 | 1610±289 | 346±116 | 8.4% (3.8% to 13.0%) | 7.8% (3.2% to 12.5%) |
| Level 2 to 3 | 1211±321 | 239±76 | 9.1% (3.8% to 14.3%) | 8.4% (3.1% to 13.7%) |
| Level 3 to 4 | 874±128 | 191±51 | 10.5% (5.1% to 16.0%) | 11.8% (6.4% to 17.3%) |
| Level 4 to 5 | 355±100 | 77±30 | 10.9% (2.9% to 18.9%) | 16.4% (8.4% to 24.4%) |
*All analyses are adjusted for reduced stair use during weekend days.
†Additional adjustment for the number of hospital restaurant visitors as a measure of the number of staff and visitors inside the hospital on each day.