Table 1 Sample sedentary time measured objectively (activPAL) and self-report measures of sedentary time. Single (total sitting/proportion), Proxy (TV, screen), Composite (behaviour, domain, pattern)
Measure of SB | Taxon | Mean | Standard deviation | Median | 25–75 percentile | |
|---|---|---|---|---|---|---|
Objective measure | ||||||
Total sitting time (min/day) | 628.7 | 120.7 | 625.5 | 545.9–707.7 | ||
Proportion of waking day spent sitting (%) | 62.6 | 10.9 | ||||
Self reported | ||||||
Previous day recall | ||||||
Single item total sedentary time (min/day) | 1.1.1/2.1 | 422.5 | 160.9 | 420.0 | 300.0–525.0 | |
Single item Proportion of the day (%) [min/day] | 1.1.1/2.1 | 49.8 [478.1] | 17.5 [168.0] | 50.0 [480.0] | 37.1–60.0 [357.0–576.0] | |
Single item proxy TV time (min/day) | 1.1.2/2.1 | 191.5 | 123.2 | 180.0 | 120.0–270.0 | |
Composite Sum of domains (min/day) | 1.2.2.2/2.1 | 499.0 | 196.8 | 480.0 | 360.0–600.0 | |
Composite Sum of behaviours (min/day) | 1.2.2.1/2.1 | 811.9 | 331.5 | 770.0 | 600.0–975.0 | |
Composite Pattern (min/day) | 1.2.1/2.1 | 589.8 | 587.3 | 450.0 | 270.0–718.0 | |
Previous week recall | ||||||
Single item total sedentary time (min/day) | 1.1.1/2.2 | 486.0 | 486.5 | 420.0 | 300.0–491.3 | |
Single item Proportion of the day (%) [min/day] | 1.1.1/2.2 | 50.9 [488.6] | 16.2 [155.5] | 50 [480.0] | 40.0–60.0 [384–576] | |
Single item proxy TV time (min/day) | 1.1.2/2.2 | 235.9 | 206.5 | 200.0 | 126.3–288.8 | |
Composite Sum of domains (min/day) | 1.2.2.2/2.2 | 662.6 | 466.5 | 570.0 | 440.0–750.0 | |
Composite Sum of behaviours (min/day) | 1.2.2.1/2.2 | 1125.2 | 867.8 | 930.0 | 713.8–1260.0 | |
Composite Pattern (min/day) | 1.2.1/2.2 | 845.4 | 1796.7 | 480.0 | 300.0–900.0 | |
Unanchored (usual day) | ||||||
Single item total sedentary time (min/day) | 1.1.1/2.4 | 379.2 | 152.3 | 360.0 | 270–960 | |
Single item Proportion of the day (%) [min/day] | 1.1.1/2.4 | 46.6 [447.4] | 18.1 [173.8] | 45.0 | 30.0–60.0 [432.0–576.0] | |
Single item proxy TV time (min/day) | 1.1.2/2.4 | 215.8 | 123.6 | 180.0 | 120.0–270.0 | |
Composite Sum of domains (min/day) | 1.2.2.2/2.4 | 557.4 | 234.0 | 540.0 | 415.0–662.5 | |
Composite Sum of behaviours (min/day) | 1.2.2.1/2.4 | 933.8 | 428.6 | 882.5 | 670.0–1110.0 | |
Composite Pattern (min/day) | 1.2.1/2.4 | 266.7 | 743.9 | 64.0 | 25.0–150.3 | |