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Table 1 Baseline characteristics of the Irish COSI study sample separately by sex

From: School sociodemographic characteristics and obesity in schoolchildren: does the obesity definition matter?

  All (n = 7542) Boys (n = 3476) Girls (n = 4066)
median 25th–75th median 25th–75th median 25th–75th
Age (years) 10.4 9.3–11.5 10.5 9.4–11.5 10.4 9.3–11.4
Weight (kg) 36.1 30.9–42.9 36.0 31.1–42.0 36.2 30.8–43.7
Height (cm) 142.4 135.9–149.5 142.9 136.5–149.4 141.9 135.4–149.5
WC (cm) 62.4 58.3–68.2 62.5 58.8–68.0 62.3 57.9–68.4
BMI (kg/m2) 17.6 16.2–19.8 17.5 16.1–19.3 17.8 16.2–20.2
  n % n % n %
School socioeconomic status
 Non-disadvantaged schools 6636 88.0 3091 88.9 3545 87.2
 Disadvantaged schools 906 12.0 385 11.1 521 12.8
School location
 Urban 6303 83.6 2888 83.1 3415 84.0
 Rural 1239 16.4 588 16.9 651 16.0
  1. BMI body mass index, WC waist circumference