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Table 1 Number of different values per person among all counts/minute, overall and by categories for youth and adults; NHANES 2003–2006

From: Performance of the ActiGraph accelerometer using a national population-based sample of youth and adults

  Youth 6–17 years (n = 4028) Adults > =18 years (n = 7931)
Mean (SE) 25th percentile 50th percentile 75th percentile Mean (SE) 25th percentile 50th percentile 75th percentile
Overall, counts/minute 1381.4 (5.5) 1127.0 1360.0 1623.0 1101.2 (3.7) 874.0 1085.0 1313.0
0 to 99 counts/minute 99.7 (0.0) 100.0 100.0 100.0 99.8 (0.0) 100.0 100.0 100.0
100 to 499 counts/minute 351.2 (0.6) 336.0 361.0 377.0 352.4 (0.5) 338.0 364.0 380.0
500 to 999 counts/minute 305.6 (1.1) 259.0 314.0 360.0 284.0 (1.0) 226.0 296.0 353.0
1000 to 1999 counts/minute 328.0 (1.9) 236.0 320.0 416.0 240.5 (1.6) 136.0 225.0 329.0
2000 to 2999 counts/minute 149.0 (1.2) 94.0 137.0 195.0 75.4 (0.8) 24.0 58.0 107.0
3000 to 3999 counts/minute 72.1 (0.7) 36.0 63.0 100.0 29.8 (0.4) 5.0 16.0 41.0
4000 to 4999 counts/minute 35.3 (0.5) 13.0 27.0 48.0 16.1 (0.3) 2.0 6.0 19.0
> = 5000 counts/minute 42.5 (0.8) 10.0 25.0 56.0 17.4 (0.6) 1.0 4.0 15.0
  1. SE = standard error.