Table 1

Descriptive characteristics and unadjusted physical activity and sedentary behaviour patterns of participants (mean+95% CI)

TotalDifference, boys vs girlsHealthy weight†Overweight or obeseDifference (healthy weight vs overweight or obesity)
N(Mean±95% CI)(Mean diff±95% CI)Effect size (d)N(Mean±95% CI)N(Mean±95% CI)(Mean diff±95% CI)Effect size (d)
Age (years)
 Boys(M)13011.3 (11.10 to 11.48)0.1 (−0.12 to 0.37)0.128211.4 (11.18 to 11.64)4811.1 (10.77 to 11.41)0.3 (−0.06 to 0.71)0.30
 Girls(F)168 11.2 (11.01 to 11.32)12411.1 (10.92 to 11.29)4411.3 (11.04 to 11.64)−0.2 (−0.59 to 0.12)−0.23
Ethnicity–language
 (Language other than English)(M)1713.60%810.26%919.15%
(F)2112.50%1612.90%511.36%
SEIFA quintile (%)
 Lowest quintile(M)3730.33%2532.47%1226.67%
(F)3320.25%2722.13%614.63%
BMI-z(M)1300.6 (0.41 to 0.84)0.3 (0.49 to 0.58)0.2782−0.1 (−0.31 to 0.03)481.9 (1.77 to 2.10) Φ Φ Φ−2.1 (−2.33 to −1.82)−2.95
(F)1680.3 (0.15 to 0.48)*124−0.2 (−0.31 to −0.04)441.7 (1.51 to 1.85) +++−1.9 (−2.10 to −1.61)−2.59
Valid wear (days)
 Valid weekdays(M)1303.9 (3.75 to 4.08)0.1 (−0.13 to 0.33)0.10823.8 (3.64 to 4.05)484.0 (3.76 to 4.32)−0.2 (−0.54 to 0.14)−0.21
(F)1683.8 (3.66 to 3.97)1243.8 (3.64 to 4.00)443.8 (3.45 to 3.14)0.0 (−0.33 to 0.39)0.03
 Valid weekend days(M)1301.3 (1.15 to 1.43)0.0 (−0.17 to 0.18)0.01821.3 (1.17 to 1.51)481.2 (0.99 to 1.43)0.1 (−0.14 to 0.41)0.17
(F)1681.3 (1.17 to 1.40)1241.3 (1.20 to 1.46)441.2 (0.91 to 1.40)0.2 (−0.09 to 0.43)0.23
Daily wear-time (min/day)‡(M)130789.4 (774.99 to 803.71)−4.0 (−23.33 to 15.37)−0.0582779.7 (763.42 to 796.01)48805.8 (778.43 to 833.19)−26.1 (−55.62 to 2.44)−0.32
 (Monday–Sunday)(F)168793.3 (780.35 to 806.31)124792.4 (775.95 to 808.86)44796.0 (777.46 to 814.44)−3.6 (−33.16 to 26.07)−0.04
Daily activity counts (counts/min)‡(M)130261.3 (244.28 to 278.31)33.5 (12.15 to 54.85)0.3682269.1 (247.63 to 290.57)48248.0 (219.45 to 276.48)21.1 (−14.06 to 56.34)0.22
 (Monday–Sunday)(F)168227.8 (214.29 to 241.30)**124233.8 (217.69 to 249.85)44210 (186.00 to 235.90)22.8 (−7.79 to 53.43)0.26
Daily sedentary (min/day)‡(M)130479.0 (463.41 to 494.57)−24.3 (−45.20 to −3.46)−0.2782469.0 (450.72 to 487.17)48496.1 (467.41 to 524.88)−27.2 (−59.26 to 4.86)−0.31
 (Monday–Sunday)(F)168503.3 (489.37 to 517.26)*124495.0 (478.00 to 511.93)44526.9 (503.86 to 549.85)+−31.9 (−63.32 to −0.46)−0.35
Daily LPA (min/day)‡(M)130192.7 (187.30 to 198.12)−7.9 (−15.76 to 0.7)−0.2382191.3 (184.13 to 198.54)48195.1 (186.80 to 203.33)−3.7 (−14.97 to 7.51)−0.12
 (Monday–Sunday)(F)168200.6 (194.96 to 206.15)124204.6 (198.25 to 210.95)44189.2 (177.74 to 200.57) +15.5 (2.90 to 28.00)0.43
Daily MVPA (min/day)‡(M)130116.7 (111.58 to 121.84)28.3 (21.80 to 34.70)1.0182118.5 (112.03 to 124.97)48113.7 (105.02 to 122.29)4.9 (−5.75 to 15.48)0.16
 (Monday–Sunday)(F)16888.5 (84.37 to 92.56)***12491.8 (86.97 to 96.60)4479.1 (71.73 to 86.43) ++12.7 (3.58 to 21.85)0.48
Meeting MVPA guidelines(M)12696.9%8097.6%4695.8%
(Average method %) (Monday–Sunday)(F)14485.7%**11290.3%3272.7%++
  • Independent-sample t-tests or χ2 tests used to determine significant mean or proportional differences between boys and girls overall with *p≤0.05; **p≤0.01; ***p≤0.001; Cohen's d effect size was calculated for mean differences in ratio data; boys with healthy weight boys differed significantly to boys with overweight/obesity Φp≤0.05; Φ Φ Φp≤0.001; Girls with healthy weight girls differed significantly to girls with overweight/obesity with +p≤0.05; ++p≤0.01; +++p≤0.001);

  • †Healthy weight category included underweight.

  • ‡Based on >600 min/day of monitoring over ≥3 days.

  • SEIFA, Index of Relative Socioeconomic Advantage and Disadvantage (IRSAD).