Table 2

Distribution of subjects with a forced expiratory volume in one second (FEV₁) % predicted <80% at the end of the study according to bronchial responsiveness and FEV₁ % pred at baseline

End of study FEV₁ <80% pred	PC₂₀ ≤16 mg·mL⁻¹Baseline FEV₁ <80% pred		PC₂₀ >16 mg·mL⁻¹ Baseline FEV₁ <80% pred		All Baseline FEV₁ <80% pred
End of study FEV₁ <80% pred	Yes	No	Yes	No	Yes	No
Yes	6 (100)	5 (15.2)	1 (100)	10 (6.5)	7 (100)	15 (8.0)
No	0	28 (84.8)	0	144 (93.5)	0	172 (92)
Total	6	33	1	154	7	187

Data are presented as n (%) or n
PC₂₀: provocative concentration causing a 20% fall in FEV₁