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Table 2 Prevalence and predictive values of questions for diagnosing asthma by GINA

From: The correlation between the bronchial hyperresponsiveness to methacholine and asthma like symptoms by GINA questionnaires for the diagnosis of asthma

Question

Prevalence (%)

Sensitivity (%)

Specificity (%)

PPV* (%)

NPV†(%)

Q1. Wheezing

38

50.8

65.8

28.1

83.6

Q2. Exercise-induced dyspnea

53

70.2

49.1

26.7

86.2

Q3. Nocturnal cough/dyspnea

47

62.1

44.8

22.8

81.8

Q4. URI‡ ≥10 days

49

64.5

42.2

22.7

81.8

Q5. Pollution-induced dyspnea

50

66.1

39.7

22.4

81.7

  1. Abbreviations: * PPV positive predictive value, † NPV negative predictive value. ‡ URI upper respiratory tract infection.