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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)

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

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