Table 4.
Summary statistics and intervention effect estimates (intervention minus control) for primary and secondary measures of physical activity
| Outcome | Intervention mean (SD) N | Controlmean (SD) N | Adjusted difference in meansa (95% CI) | P-valuea | ||
|---|---|---|---|---|---|---|
| Baseline | Follow-up | Baseline | Follow-up | |||
| Primary | ||||||
| i) Daily minutes of moderate to vigorous physical activity (MVPA) | 55.0 (24.9) 142 |
53.3 (23.7) 142 |
57.7 (37.0) 180 |
53.9 (27.6) 180 |
0.3 (−5.3, 5.9) | 0.917 |
| Secondary | ||||||
| ii) Overall physical activity (counts per minute) | 390.5 (144.2) 142 |
387.6 (148.5) 142 | 417.1 (267.4) 180 |
392.7 (168.8) 180 |
3.5 (−30.3, 37.4) | 0.838 |
| iii) Sedentary time (minutes per day) | 585.5 (63.3) 141 |
580.0 (97.0) 141 | 581.9 (80.1) 178 |
585.4 (108.6) 178 |
1.0 (−11.7, 13.6) | 0.882 |
| iv) Daily minutes of MVPA during commute | 13.9 (14.1) 183 |
13.8 (14.0) 183 | 13.3 (15.1) 213 |
16.2 (19.0) 213 |
−3.1 (−6.0, −0.2) | 0.036 |
| Sensitivity analyses of primary outcome | ||||||
| Daily minutes of MVPA: 1 day of valid data | 52.6 (25.0) 189 |
51.1 (23.7) 189 | 55.5 (35.1) 217 |
52.6 (28.1) 217 |
−0.4 (−5.3, 4.5) | 0.876 |
aMulti-level mixed effect linear regression model adjusted for size, location and type of business, baseline outcome, accelerometer wear-time at follow-up (for outcomes i and iii) and workplace as a random effect