Table 2. Accelerometer-derived sedentary time (time spent lying or sitting) variables during whole day (n = 692), work (n = 671) and non-work (n = 671) time domain among blue-collar workers in the Danish PHysical ACTivity cohort with Objective measurements (DPhacto).
| Whole day | Work | Non-work | ||||
|---|---|---|---|---|---|---|
| Variables | Mean | SD | Mean | SD | Mean | SD |
| Total sedentary time (hours/day) | 7.83 | 2.13 | 2.45 | 1.75 | 5.49 | 1.46 |
| LB (hours/day) | 3.17 | 1.67 | 0.50 | 0.94 | 2.65 | 1.40 |
| MB (hours/day) | 3.60 | 1.28 | 1.40 | 1.09 | 2.30 | 0.80 |
| BB (hours/day) | 1.06 | 0.58 | 0.55 | 0.50 | 0.54 | 0.25 |
| Total measured time* | 15.93 | 1.45 | 7.60 | 1.29 | 8.79 | 1.60 |
| Number of valid days | 2.92 | 0.96 | 2.64 | 0.95 | 2.64 | 0.95 |
| Standing time (hours/day) | 6.07 | 1.83 | 3.88 | 1.56 | 2.46 | 0.97 |
| Walking time (hours/day) | 1.85 | 0.61 | 1.20 | 0.50 | 0.72 | 0.33 |
| MVPA time (hours/day) | 0.18 | 0.21 | 0.06 | 0.07 | 0.12 | 0.19 |
LB = long sedentary bouts (average time/day spent in uninterrupted sedentary bouts >30 min), MB = moderate sedentary bouts (average time/day spent in uninterrupted sedentary bouts >5 and ≤30min), BB = brief sedentary bouts (average time/day spent in uninterrupted sedentary bouts ≤5mins), MVPA = moderate to vigorous physical activity.
* total measured time and the time in bed do not sum up to 24 hours due to the inclusion of days with at least 10 hours of measured waking time but not all waking hours on that day.