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Table 1 Baseline characteristics of subjects who underwent MBPT and completed questionnaire

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

Characteristic

Asthmatics

Non-asthmatics

(n = 164)

(n = 516)

Mean age, years

43 (20–64)

49 (20–81)

Gender (male: female)

2:3

2:3

Body mass index, kg/m2†

23.5 ± 2.4 (17–30)

22.6 ± 2.4 (17–30)

Smoking history, number (%)

  

Never smoked

96 (58)

296 (57)

Current smoker

22 (13)

120 (23)

Ex-smoker

2 (1)

42 (8)

FEV1 (%predicted)

93 (70–135)

98 (70–148)

FEV1/FVC (%predicted)

78 (70–95)

82 (70–99)

  1. †P <0.05; compared with non-asthmatic patients by MBPT.
  2. Abbreviations: MBPT methacholine bronchial provocation test, FEV 1 forced expiratory volume in 1 second, FEV 1 / FVC forced expiratory volume in 1 second/forced vital capacity.