Table 1

Characteristics (%) of the study population and the sample population

Study population (n=450)Sample population (n=2504)
Mean age (years)10.09.5
Sex (boys)50.048.9
Itchy rash in last 12 months19.015.1
Wheeze in last 12 months10.09.5
Dry cough in last 12 months21.921.7
Nasal discharge in last 12 months25.622.6
Conjunctivitis in last 12 months10.97.9
Phlegm in last 12 months11.39.7
Eczema ever29.129.9
Asthma ever9.08.1
Hay fever ever8.27.3
Doctor diagnosed bronchitis8.47.8