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Table 1 Written questionnaire responses for selected questions by age group

From: Meteorologically estimated exposure but not distance predicts asthma symptoms in schoolchildren in the environs of a petrochemical refinery: a cross-sectional study

Written question

Prevalence (all participants) n = 2,361

Prevalence (ages 13 to 14 years) n = 823

Have you had wheezing or whistling in the chest in the last 12 months?

32.8%

32.4%

Have you ever had asthma?

23.7%

24.2%

Do you need to bring an asthma inhaler to school with you?

9.2%

8.9%

In the last 12 months has your chest sounded wheezy during or after exercise?

34.7%

33.6%

In the last 12 months, have you had a problem with sneezing, or a runny or blocked nose when you did not have a cold or the flu?

58.8%

57.3%

Have you ever had hayfever?

63.9%

61.4%

Have any of your brothers or sisters, or your parents ever had asthma or hayfever ("family atopy")?

69.7%

70.9%

Do any of the adults in your home smoke cigarettes ("passive smoking")?

69.7%

64.2%

Have you ever smoked a cigarette?

38.1%

53.8%