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Table 1 Descriptive characteristics of the participants, weight and physical activity status

From: Associations between accelerometer-measured physical activity and body fatness in school-aged children

  Girls
(N = 209)
Boys
(N = 156)
Mean SD 95% CI Mean SD 95% CI
Age and anthropometrics
 Age, years 9.8 1.3 9.6 to 10.0 9.9 1.2 9.7 to 10.0
 Body height, cm 142.5 8.9 141.3 to 143.7 143.8 9.4 142.3 to 145.2
 Body weight, kg 35.8 8.8 34.6 to 37.0 37.4 9.2 36.0 to 38.9
 BMI, kg · m−2 17.4 2.8 17.0 to 17.8 17.9 2.8 17.4 to 18.3
Weight status, N (% of N)a
 Underweight 9 (4)     8 (5)    
 Normal weight 152 (73)     113 (73)    
 Overweight 26 (12)     25 (16)    
 Obesity 22 (11)     10 (6)    
Physical activity
 Sedentary time, min · d−1 394.4 51.7* 387.4 to 401.5 379.3 48.5 371.6 to 386.9
 Light physical activity, min · d–1b 106.8 27.3* 103.1 to 110.5 117.0 36.2 111.2 to 122.7
 MVPA, min · d–1b 37.4 16.7* 35.1 to 39.6 46.7 21.3 43.4 to 50.1
 Vigorous physical activity, min · d–1b 5.3 6.6 4.4 to 6.2 5.2 5.9 4.3 to 6.2
 Steps per day 10 465 2 394* 10 138 to 10 791 11 176 2 949 10 709 to 11 642
Physical activity status
 Achieve ≥60 min · d−1of MVPA, N (% of N) 17 (8)     34 (22)    
 Number of days with wear time ≥10 hc 6 (1)     6 (1)    
 Wear time, h · d−1 12.8 0.9 12.7 to 12.9 13.0 0.9 12.9 to 13.2
  1. N number of participants, SD standard deviation, CI confidence interval, BMI body mass index, MVPA moderate-to-vigorous physical activity
  2. *Significantly different from boys, independent samples t-test, P < 0.05
  3. aCategories were defined by sex- and age-specific cut-off points for BMI
  4. bValues were transformed to natural logarithms before analysis
  5. cExpressed as the median and interquartile range