borderline significancep = 0.05
The lowest 12.4% of AQ20 (summary score >14, N = 92/739, 12.1% of men and 18.2% of women) was associated with borderline significance to moderate airway obstruction (OR 2.5, 95% CI 1.0-6.0, p = 0.05, when FEV 1 64-40% of predicted) and significantly to severe airway obstruction (OR 5.2, 95% CI 2.0-13.2, p ≤ 0.001, when FEV 1 < 40%).