Table 2.
Time spent sedentary (sitting/lying), standing and stepping and step count at T0, T1 and T2. Within-group differences from baseline to T1 and T2
| Baseline | T1 (week 4) | T2 (week 12) | Within-group differences | ||
| SitFIT-UPR | Mean (SD) | Mean (SD) | Mean (SD) | Δ T1 (95% CI) | Δ T2 (95% CI) |
| Sitting/lying* | |||||
| min/day | 618.5 (99.6) | 613.9 (157.4) | 562.2 (135.3) | −4.6 (−75.4, 66.3) | −56.3 (−86.8, 26.7) |
| % wear time | 64.1 (9.8) | 63.6.0 (17.5) | 58.7 (15.1) | ||
| Standing* | |||||
| min/day | 238.1 (63.1) | 254.5 (64.6) | 265.0 (83.9) | 16.4 (−8.5, 41.2) | 26.9 (−23.7, 77.5) |
| % wear time | 24.8 (7.0) | 26.4 (6.9) | 27.6 (8.9) | ||
| Stepping† | |||||
| min/day | 135.1 (55.1) | 145.5 (55.9) | 148.6 (53.7) | 10.4 (−0.1, 20.9) | 13.5 (1.3, 25.6) |
| % wear time | 14.0 (6.0) | 15.1 (5.9) | 15.6 (5.9) | ||
| Step count† | |||||
| Steps/day | 10 509 (3499) | 10 655 (3593) | 13 090 (5958) | 147 (−1197, 1490) | 2582 (−354, 5517) |
| SitFIT-SED | |||||
| Sitting/lying* | |||||
| min/day | 591.0 (92.5) | 579.9 (165.4) | 631.0 (153.2) | −11.1 (−81.3, 59.1) | 40.0 (−38.6, 118.5) |
| % wear time | 62.1 (8.4) | 60.7 (17.2) | 66.5 (15.3) | ||
| Standing* | |||||
| min/day | 232.2 (49.9) | 262.3 (68.6) | 237.6 (56.5) | 30.1 (−1.4, 61.6) | 5.4 (−31.3, 42.2) |
| % wear time | 24.5 (5.4) | 27.6 (7.3) | 25.1 (5.8) | ||
| Stepping* | |||||
| min/day | 127.9 (41.2) | 134.55 (41.2) | 132.7 (46.0) | 6.6 (−5.1, 18.3) | 4.8 (−8.0, 17.6) |
| % wear time | 13.6 (4.8) | 14.1 (4.4) | 14.0 (5.0) | ||
| Number of steps | |||||
| Steps/day | 11 602 (4540) | 11 969 (4413) | 11 552 (4486) | 367 (−663, 1396) | −50 (−3249, 3151) |
| Total | |||||
| Sitting/lying‡ | |||||
| min/day | 604.7 (95.9) | 596.9 (160.3) | 596.6 (146.8) | −7.8 (−55.4, 39.7) | −8.2 (−60.6, 44.3) |
| % wear time | 63.1 (9.0) | 62.1 (16.3) | 62.6 (15.5) | ||
| Standing‡ | |||||
| min/day | 235.1 (56.2) | 258.4 (65.9) | 251.3 (72.0) | 23.2 (4.0, 42.5) | 16.2 (−13.9, 46.2) |
| % wear time | 24.6 (6.2) | 27.0 (7.1) | 26.3 (7.5) | ||
| Stepping§ | |||||
| min/day | 131.4 (48.0) | 140.0 (48.7) | 140.4 (49.9) | 8.5 (9.9, 16.0) | 9.0 (0.5, 17.5) |
| % wear time | 13.8 (5.3) | 14.6 (5.1) | 14.8 (5.5) | ||
| Number of steps§ | |||||
| Steps/day | 11 069 (4040) | 11 329 (4036) | 12 301 (5243) | 260 (−542, 1061) | 1232 (−886, 3351) |
Percentage of wear time (ie, non-sleep wear time) exceeds 100% by up to 5% at places. This might be due to underestimation of sleep and non-wear time (recall bias).
*Sample size n=20.
†Sample size n=19.
‡Sample size n=40.
§Sample size n=39.
SED, sedentary time; UPR, upright time.