| Total sedentary time (min/day) | Breaks in sedentary time (num/day) | Time spent in bouts ≥ 30 min (min/day) | Mean bout duration (min) | Usual bout duration (min) | Alpha (unitless) |
---|---|---|---|---|---|---|
Descriptive statistics | ||||||
 activPAL, Mean (SD) | 455.1 (88.4) | 82.5 (19.3) | 111.5 (54.9) | 5.74 (1.46) | 14.68 (4.26) | 1.40 (0.04) |
 CHAP-child, Mean (SD) | 483.1 (89.0) | 81.5 (17.4) | 121.8 (62.3) | 6.12 (1.45) | 15.13 (3.92) | 1.39 (0.03) |
 ActiGraph 100 cpm, Mean (SD) | 364.3 (79.0) | 91.1 (14.4) | 28.1 (24.6) | 4.02 (0.70) | 6.53 (1.82) | 2.13 (0.16) |
Agreement between CHAP-child and activPAL | ||||||
 Bias, Mean (SD) | 28.1 (31.7) | -1.0 (8.8) | 10.3 (30.1) | 0.37 (0.79) | 0.46 (2.17) | -0.01 (0.02) |
 Mean absolute error | 30.6 | 6.8 | 23.4 | 0.61 | 1.48 | 0.02 |
 Mean absolute percent error | 6.7% | 8.2% | 21.0% | 10.6% | 10.1% | 1.4% |
 Spearman correlation | 0.93 | 0.87 | 0.85 | 0.84 | 0.84 | 0.76 |
 Concordance correlation | 0.89 | 0.88 | 0.86 | 0.83 | 0.85 | 0.72 |
Agreement between ActiGraph 100Â cpm and activPAL | ||||||
 Bias, Mean (SD) | -90.7 (58.2) | 8.6 (16.1) | -83.3 (50.0) | -1.72 (1.13) | -8.15 (3.58) | 0.73 (0.15) |
 Mean absolute error | 92.2 | 14.9 | 83.3 | 1.75 | 8.15 | 0.73 |
 Mean absolute percent error | 20.3% | 18.1% | 74.7% | 30.5% | 55.5% | 52.1% |
 Spearman correlation | 0.75 | 0.57 | 0.55 | 0.62 | 0.60 | 0.53 |
 Concordance correlation | 0.48 | 0.49 | 0.14 | 0.24 | 0.10 | 0.01 |