Table 4—

Between-country and within-country variance in respiratory outcome prevalences

Respiratory outcomeBetween-country varianceWithin-country (between-town) variance
Cough usually in autumn/winter in the morning93.96.1
Cough last autumn/winter for at least 3 months95.44.6
Wheeze in past 12 months89.510.5
Wheeze with shortness of breath64.435.6
Asthma ever diagnosed by a doctor84.615.4
Bronchitis ever diagnosed by a doctor61.938.1
Asthmatic, spastic or obstructive bronchitis ever diagnosed by a doctor90.010.0
Pneumonia ever diagnosed by a doctor21.878.2
  • Data are presented as % of variance