Table 2—

Prevalence(%) of respiratory health of the studied schoolchildren, by country and passive smoking exposure at home (ETS)

TotalItalyNorwaySwedenDenmarkFrancep-value
Subjects n6542422913490159
Wheeze13.313.210.311.310.117.6ns
Dry cough at night34.447.131.017.225.835.1<0.001
Rhinitis31.735.441.425.611.141.6<0.001
ETS noETS yes
Subjects420217
Wheeze10.618.1<0.05
Dry cough at night28.346.0<0.001
Rhinitis30.935.3ns
  • Data are presented as %, unless stated otherwise. ns: not significant. p-values were calculated using Chi-squared test.