Skip to main content

Advertisement

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

From: Systematic comparative validation of self-report measures of sedentary time against an objective measure of postural sitting (activPAL)

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
  1. Single item proportion of the day was converted into sitting time per day in minutes assuming a standard 16 h waking day