Variables | Midnight (median ± IQR) | Midday (median ± IQR) | Normality KS | Z difference | P value |
---|---|---|---|---|---|
Hours awake (h) | 12.49 ± 1.81b | 12.46 ± 1.80b | .200 | -.028a | .438 |
Standing duration (h) | 0.87 ± 2.66 | 0.85 ± 2.62 | < .001 | -.279 | .780 |
% time awake standing | 8.03 ± 20.61 | 7.59 ± 20.16 | < .001 | -.102 | .919 |
Walking duration (h) | 0.26 ± 0.73 | 0.26 ± 0.65 | < .001 | -.072 | .943 |
% time awake walking | 2.09 ± 4.94 | 2.07 ± 4.88 | < .001 | -.158 | .874 |
Absolute time upright (h) | 1.28 ± 3.45 | 2.29 ± 3.51 | < .001 | -.294 | .769 |
% time awake upright | 11.49 ± 27.04 | 11.23 ± 27.62 | < .001 | -.056 | .955 |
Number of sit to stand transitions | 21.16 ± 29.50 | 21.33 ± 29.17 | < .001 | -5.368 | < .001* |
Absolute time in SB (h) | 10.63 ± 2.41 | 10.61 ± 2.29 | .001 | -.795 | .427 |
% time awake in SB | 88.50 ± 27.04 | 88.76 ± 27.62 | < .001 | -.056 | .955 |
Number of SB bouts < 30 min | 16.16 ± 25.33 | 15.66 ± 26.0 | < .001 | -3.932 | < .001* |
Absolute time spent in bouts < 30 min (h) | 1.43 ± 2.63 | 1.52 ± 2.70 | < .001 | -6.658 | < .001* |
% time awake in bouts < 30 min | 10.57 ± 18.74 | 12.54 ± 19.23 | < .001 | -6.658 | < .001* |
Number of SB bouts between 30–60 min | 2.33 ± 4.0 | 2.33 ± 4.00 | < .001 | -.858 | .391 |
Absolute time spent in bouts between 30–60 min (h) | 1.62 ± 2.84 | 1.55 ± 2.75 | < .001 | -2.704 | .007* |
% time awake in bouts between 30–60 min | 11.99 ± 20.71 | 11.92 ± 20.50 | < .001 | -2.993 | .003* |
Number of SB bouts > 60 min | 2.33 ± 1.33 | 2.83 ± 1.50 | < .001 | -4.041 | < .001* |
Absolute time spent in bouts > 60 min (h) | 6.47 ± 7.72 | 6.35 ± 7.63 | < .001 | -5.473 | < .001* |
% of time awake in bouts > 60 min | 54.39 ± 72.61 | 52.18 ± 71.79 | < .001 | -6.161 | < .001* |
Average duration of SB bouts (min) | 29.14 ± 99.10 | 29.53 ± 80.89 | < .001 | -6.832 | < .001* |