Table 2 Bland and Altman (B-A) statistics (differences objective – self-report measure) including bias, lower and upper limits of agreement (LOA), percentage of data loss, and correlation statistics results of the comparison between self-report measures of sedentary time s against objective data (activPAL) organised according to the TASST taxonomy
Self reported measures | TASST Taxon (Fig. 1) | % data loss | B-A bias Correction factor (min) [%] | B-A Lower LOA (min) [%] | B-A Upper LOA (min) [%] | St. dev of difference (min) [%] | correlation | p-value |
|---|---|---|---|---|---|---|---|---|
Previous day recall | ||||||||
Single item total sedentary time (min) | 1.1.1/2.1 | 1.0 | 207.0 | − 146.8 | 560.8 | 180.5 | 0.20 | < 0.001 |
Single item Proportion of the day (%) [min] | 1.1.1/2.1 | 0.7 | 12.9 [123.8] | −22.1 [−212.2] | 47.8 [458.9] | 17.8 [170.9] | 0.28 | < 0.001 |
Single item proxy TV time (min) | 1.1.2/2.1 | 2.4 | 439.0 | 144.8 | 733.2 | 150.1 | 0.24 | < 0.001 |
Composite Sum of domains (min) | 1.2.2.2/2.1 | 0.7 | 130.3 | − 272.5 | 533.1 | 205.5 | 0.23 | < 0.001 |
Composite Sum of behaviours (min) | 1.2.2.1/2.1 | 4.3 | − 145.2 | −651.2 | 366.7 | 258.2 | 0.23 | < 0.001 |
Composite Pattern (min) | 1.2.1/2.1 | 9.7 | 138.0 | − 471.6 | 747.5 | 311.0 | 0.17 | < 0.001 |
Previous week recall | ||||||||
Single item total sedentary time (min) | 1.1.1/2.2 | 4.9 | 221.3 | − 149.9 | 563.9 | 182.1 | 0.23 | < 0.001 |
Single item Proportion of the day (%) [min] | 1.1.1/2.2 | 0.9 | 11.8 [113.2] | −19.3 [− 185.3] | 42.9 [411.8] | 15.9 [152.6] | 0.36 | < 0.001 |
Single item proxy TV time (min) | 1.1.2/2.2 | 2.6 | 406.2 | 80.6 | 731.9 | 166.1 | 0.23 | < 0.001 |
Composite Sum of domains (min) | 1.2.2.2/2.2 | 3.9 | 34.5 | − 412.9 | 482.1 | 228.3 | 0.30 | < 0.001 |
Composite Sum of behaviours (min) | 1.2.2.1/2.2 | 16.9 | − 244.9 | − 755.2 | 265.3 | 260.3 | 0.32 | < 0.001 |
Composite Pattern (min) | 1.2.1/2.2 | 14.6 | 99.1 | − 528.8 | 726.9 | 320.3 | 0.23 | < 0.001 |
Unanchored (usual day) | ||||||||
Single item total sedentary time (min) | 1.1.1/2.4 | 2.4 | 250.6 | − 135.1 | 549.2 | 174.6 | 0.20 | < 0.001 |
Single item Proportion of the day (%) [min] | 1.1.1/2.4 | 2.3 | 16.1 [154.6] | −18.9 [− 181.4] | 51.1 [490.6] | 17.9 [171.8] | 0.32 | < 0.001 |
Single item proxy TV time (min) | 1.1.2/2.4 | 1.9 | 415.0 | 124.7 | 705.4 | 148.1 | 0.26 | < 0.001 |
Composite Sum of domains (min) | 1.2.2.2/2.4 | 1.9 | 77.9 | − 372.8 | 528.8 | 230.0 | 0.16 | < 0.001 |
Composite Sum of behaviours (min) | 1.2.2.1/2.4 | 9.1 | − 219.8 | − 725.3 | 285.6 | 257.9 | 0.33 | < 0.001 |
Composite Pattern (min) | 1.2.1/2.4 | 7.1 | 472.9 | −33.8 | 979.6 | 258.5 | 0.02 | 0.624 |