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Table 1 Descriptive statistics and main physical activity variables

From: Differences in physical activity and sedentary time in relation to weight in 8–9 year old children

  All (n = 301) Boys (n = 155) Girls (n = 146) P value¥
Age (years) 8.6 (0.4) 8.7 (0.4) 8.8 (0.6) > 0.05
Height (cm) 134.0 (6.7) 134.2 (6.8) 133.9 (6.7) > 0.05
Weight (kg) 30.5 (6.9) 30.7 (7.0) 30.3 (6.8) > 0.05
BMI SDS* 0.15 (1.32) 0.20 (1.38) 0.09 (1.25) > 0.05
Waist SDS± 0.87 (1.04) 0.97 (1.05) 0.77 (1.02) > 0.05
Fat mass index (kg/m1.28) 4.4 (3.0) 4.2 (3.0) 4.6 (3.0) > 0.05
Socioeconomic status 4 (4) 4 (3) 4 (3) > 0.05
Ethnicity 46 48 44 > 0.05v
Total activity (counts/min) 606 (154) 663 (150) 544 (134) < 0.001
Sedentary activity$ (min/day) 330 (119) 321 (109) 338 (128) > 0.05
MVPA+ (min/day) 66 (28) 78 (29) 53 (19) < 0.001
Percentage meeting recommended activity level 52 72 30 < 0.001v
  1. All values are mean (SD) unless otherwise stated
  2. *Body mass index standard deviation score
  3. ± Waist standard deviation score
  4. Measured using the Townsend index score with imputed values from school postcode, UK average is zero with positive score representing higher than average deprivation
  5. Percentage white
  6. $Cut points used: Sedentary < 100; Light 100–1999; Moderate 2000–3999; Vigorous 4000–6999; Very Vigorous 7000+
  7. +Moderate to vigorous physical activity
  8. Recommended activity level ≥ 60 min of MVPA activity daily
  9. ¥ Independent samples T-test
  10. Chi squared test