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Table 3 Number of different counts across adherent days by sociodemographic and health characteristics among adults > =18 years (n = 7931); NHANES 2003-2006

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

  Sample size (n) Mean (SE) 25th percentile 50th percentile 75th percentile p value a
Gender:       <.0001
Men 3,813 1171.4 (5.9) 918.0 1163.0 1412.0  
Women 4,118 1036.2 (4.5) 845.0 1026.0 1226.0  
Age group:       <.0001
18-34 2,530 1167.6 (6.4) 940.0 1141.5 1368.0  
35-49 1,790 1227.2 (7.2) 1015.0 1203.0 1418.0  
50-64 1,627 1126.1 (7.4) 929.0 1119.0 1303.0  
65 and older 1,984 882.4 (6.7) 671.0 862.5 1069.5  
Race/ethnicity:       <.0001
Non-Hispanic White 3,953 1076.5 (5.2) 846.0 1069.0 1298.0  
Non-Hispanic Black 1,727 1078.2 (7.7) 862.0 1062.0 1276.0  
Hispanic 1,927 1178.3 (7.9) 935.0 1158.0 1393.0  
Other 324 1065.7 (16.3) 903.0 1047.5 1222.0  
Education:       <.0001
Less than high school 1,002 1074.7 (12.1) 797.0 1031.0 1325.0  
High school graduate/GED 3,278 1097.1 (5.9) 856.0 1073.0 1311.0  
Greater than high school 3,644 1112.7 (5.2) 908.0 1105.0 1313.0  
Missing 7      
Body mass index (kg/m2):       <.0001
Underweight (<18.5) 132 1057.3 (28.5) 821.5 1070.0 1305.0  
Normal (18.5- <25) 2,517 1127.1 (6.9) 889.0 1115.0 1342.0  
Overweight (25- <30) 2,644 1130.5 (6.6) 896.0 1112.0 1350.0  
Obese (> = 30) 2,575 1052.7 (6.0) 841.0 1037.0 1252.0  
Missing 63      
Need special equipment to walk:      <.0001
Yes 660 780.8 (12.1) 535.5 737.0 971.5  
No 6,576 1128.6 (4.0) 905.0 1109.0 1325.5  
Missing 695      
Moderate to vigorous leisure activity, self-reported:     <.0001
Tertile 1 (0–0.93 hours) 2,770 1014.3 (6.7) 762.0 992.0 1236.0  
Tertile 2 (>0.93-4.63 hours) 2,455 1115.3 (6.4) 897.0 1091.0 1313.0  
Tertile 3 (>4.63 hours) 2,688 1178.5 (5.9) 966.5 1167.0 1365.0  
Missing 18      
Number of adherent accelerometer days:      <.0001
3 days 459 819.7 (10.3) 671.0 815.0 949.0  
4 days 645 932.0 (10.7) 768.0 923.0 1069.0  
5 days 998 1059.5 (9.2) 865.0 1048.5 1242.0  
6 days 1,740 1137.5 (7.7) 921.0 1128.5 1340.0  
7 days 4,089 1154.2 (5.4) 923.0 1153.0 1369.0  
Weekends 7,931 356.9 (1.8) 259.0 364.0 463.0 n/a
Weekdays 7,931 744.2 (3.1) 551.0 720.0 904.0 n/a
  1. n/a = not applicable; SE = standard error.
  2. ap value for comparison of the means; uses t-test for 2 level and analysis of variance for > =3 levels.