Table 4.
Overview of the criterion validity results in adolescents, adults and older adults
| Spearman’s rho (95 % CI) | p-value | Bland-Altman procedure | |||||
|---|---|---|---|---|---|---|---|
| Self-reported total sedentary time | ActivPAL-derived sedentary time | Regression equation: D = b0 + (b1 * A) | Standard deviation of the residuals | D at A (95 % LOA) | |||
| Adolescents | |||||||
| Weekday | 971.85 (287.65) | 618.11 (65.13) | 0.42 (0.19; 0.61) | 0.001 | / | / | / |
| Weekend day | 810.73 (351.56) | 567.98 (96.02) | 0.02 (−0.23; 0.27) | 0.861 | / | / | / |
| Average day | 925.82 (289.36) | 603.79 (56.34) | 0.29 (0.04; 0.50) | 0.023 | / | / | / |
| Adults | |||||||
| Weekday | 648.18 (270.12) | 479.18 (156.26) | 0.52 (0.22; 0.73) | 0.002 | / | / | / |
| Weekend day | 512.27 (238.02) | 447.76 (99.07) | 0.06 (−0.29; 0.40) | 0.743 | / | / | / |
| Average day | 609.35 (242.73) | 470.20 (125.46) | 0.49 (0.18; 0.71) | 0.004 | / | / | / |
| Older adults | |||||||
| Weekday | 515.45 (176.26) | 477.67 (111.33) | 0.50 (0.19; 0.72) | 0.003 | −262.14 + (0.60 × A) | 139.48 | 35.80 (−535.51; 11.24) |
| Weekend day | 506.36 (160.32) | 551.76 (115.60) | 0.38 (0.04; 0.64) | 0.030 | −288.83 + (0.46 × A) | 147.17 | −45.46 (−577.29; −0.37) |
| Average day | 512.86 (162.08) | 498.84 (102.47) | 0.48 (0.16; 0.71) | 0.005 | −287.19 + (0.60 × A) | 126.01 | 16.32 (−534.18; −40.21) |
Total sedentary times are expressed as minutes/day [mean (standard deviation)]
D difference between self-reported total sedentary time and activPAL-derived sedentary time, A average of self-reported total sedentary time and ActivPAL-derived sedentary time, b 0 intercept, b 1 slope, LOA limits of agreement (D ± 1.96 × standard deviation of the residuals), CI confidence interval. / for some variables, Kolmogorov-Smirnov Test was significant, so that Bland-Altman procedures could not be performed