# Table 1 Accelerometer measured average time (min) and % spent in PA intensity categories

All participants (n = 1131) Girls
(n = 583)
Boys
(n = 548)
Test P value1 95% CI for difference between boys and girls
Adherent accelerometer wear days (day) 6.7 (0.7) 6.6 (0.7) 6.7 (0.6) Rank-sum 0.01 NA NA
Daily wear time (h) 12.9 (1.4) 12.8 (1.5) 12.9 (1.3) Rank-sum 0.7 NA NA
Sedentary
Mean min (sd) 409.9 (69.6) 413.0 (70.6) 406.5 (68.4) T-test 0.1 − 14.6 1.7
% wear time 53.2 (7.3) 53.7 (7.3) 52.7 (7.3) T-test 0.02 −1.83 −0.13
Light
Mean min (sd) 263.4 (49.0) 265.9 (49.5) 260.8 (48.4) Rank-sum 0.048 NA NA
% wear time 34.1 (4.9) 34.4 (4.8) 33.7 (4.9) Rank-sum 0.008 NA NA
Moderate
Mean min (sd) 70.6 (20.6) 67.6 (20.0) 73.8 (20.7) T-test < 0.0012 3.9 8.6
% wear time 9.2 (2.5) 8.8 (2.4) 9.6 (2.5) T-test < 0.001 0.51 1.08
Vigorous
Mean min (sd) 27.6 (13.7) 24.2 (11.3) 31.3 (14.9) Rank-sum < 0.001 NA NA
% wear time 3.6 (1.7) 3.1 (1.4) 4.1 (1.9) Rank-sum < 0.001 NA NA
Moderate + vigorous
Mean min (sd) 98.2 (32.3) 91.7 (29.8) 105.2 (33.4) Rank-sum < 0.001 NA NA
% wear time 12.7 (3.9) 11.9 (3.6) 13.6 (4.1) Rank-sum < 0.001 NA NA
1. Values are means (SD)
2. 1P values from non-normally distributed variables are from non-parametric, two-sample, Wilcoxon-Mann-Whitney rank-sum tests of the null hypothesis that the distribution of girls is equal to the distribution of boys. P values from normally distributed variables are from two-sample t-tests of the equality of means
3. 2Results from rank-sum and t-test agreed. T-test results are reported