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Table 4 Prevalence of postural defects among 8- to 12-year-old children stratified according to sex

From: Relationship between lower-extremity defects and body mass among polish children: a cross-sectional study

Deformities Girls (n = 3516) Boys (n = 3476) p-value
  n % 95% CI n % 95% CI
Limb deformities overalla 1020 29.0 27.5–30.5 1181 34.0 32.4–35.6 < 0.001
Varus knee 1 0.0 0.0–0.1 13 0.4 0.2–0.7 0.001
Valgus knee 507 14.4 13.2–15.6 510 14.7 13.5–15.9 0.765
Valgus heel 676 19.2 17.9–20.5 850 24.5 23.1–26.0 < 0.001
Flatfoot overall 117 3.3 2.7–3.9 215 6.2 5.4–7.1 < 0.001
I degree 53 1.5 1.1–2.0 96 2.8 2.3–3.4 < 0.001
II degree 40 1.1 0.8–1.5 83 2.4 1.9–2.9 < 0.001
III degree 22 0.6 0.4–0.9 31 0.9 0.6–1.3 0.200
IV degree 2 0.1 0.0–0.3 5 0.1 0.0–0.2 0.250
  1. a Children may have more than one limb deformity