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Table 2 Number of non-wear periods and wear time as reported in logs and analyzed by accelerometry using different non-wear criteria

From: A comparison of 10 accelerometer non-wear time criteria and logbooks in children

  Number of non-wear bouts Wear time
  Frequency (% of days) Range Mean (95% CI)
  0 1 2 3 4 5 +   
Logbook 77.1 22.1 0.7 0.1 0.0 0.0 03 812 (809814)
Non-wear criteriaa
 10 9.6 15.2 17.3 15.9 12.6 29.4 0–20 755 (753–758)
 20 48.9 30.6 12.3 5.6 1.9 0.6 0–7 794 (792–797)
 30 68.2 24.4 5.9 1.4 0.1 0.0 0–5 806 (803–808)
 45 81.2 16.2 2.4 0.2 0.0 0.0 0–4 815 (812–818)
 60 86.6 12.1 1.2 0.1 0.0 0.0 0–3 820 (818–824)
 60–1 84.9 13.4 1.6 0.1 0.0 0.0 0–3 802 (800–805)
 60–2 78.9 17.6 3.0 0.4 0.1 0.0 0–5 791 (788–794)
 90 92.8 6.9 0.3 0.0 0.0 0.0 0–2 833 (830–836)
 90–1 93.0 6.7 0.2 0.0 0.0 0.0 0–3 813 (810–816)
 90–2 91.4 8.1 0.5 0.0 0.0 0.0 0–3 806 (803–808)
  1. aAccelerometer non-wear criteria are minutes of consecutive zero counts without any allowance for interruptions above zero counts (10–90) and ≥60 and 90 min of consecutive zero counts with allowance for 1 and 2 min of interruptions above zero counts (60–1, 60–2, 90–1, and 90–2)