Table 1

Characteristics of the schoolchildren having participated in the French 6 Cities Study

FactorsAll (n=6590)Restricted sample (n=4643)*
Age (years) (mean±SD)10.4±0.710.4±0.7
Sex (men) (%)49.349.2
Weight (kg) (mean±SD)36.2±8.236.3±8.2
Height (m) (mean±SD)1.42±0.081.42±0.08
Body mass index (m/kg2) (mean±SD)17.9±2.917.9±2.9
Peak flow (ml/min) (mean±SD)330.3±49.1331.7±49.6
Parental history of allergy (%)36.236.6
Exposure to tobacco smoke (%)43.843.0
  • Body mass index: weight/height2.

  • * Underwent medical examination during the same week as air quality assessments.