Table 5 Number of measurement days needed for 80%, 85% and 90% reliability when measuring sitting time and physical activity at work and in leisure time by using a thigh-born accelerometer (Actigraph)
No. Days, 80% reliability | No. Days, 85% reliability | No. Days, 90% reliability | |
|---|---|---|---|
Work sit (min) | 4.7 | 6.7 | 10.6 |
Work stand (min) | 4.2 | 5.9 | 9.4 |
Work steps | 4.0 | 5.7 | 9.0 |
Work MVPA (min) | 4.2 | 5.9 | 9.4 |
Leisure sit (min) | 5.5 | 7.8 | 12.4 |
Leisure stand (min) | 4.7 | 6.7 | 10.6 |
Leisure steps | 6.8 | 9.6 | 15.3 |
Leisure MVPA (min) | 5.8 | 8.2 | 13.0 |
Total sit (min) | 4.0 | 5.7 | 9.0 |
Total stand (min) | 3.0 | 4.3 | 6.8 |
Total steps | 5.3 | 7.5 | 11.9 |
Total MVPA (min) | 5.1 | 7.2 | 11.5 |