Table 3.

Relationship to Airway Hyperresponsiveness in All Patients Using a Cutoff Value for Body Mass Index at 30, 35, and 40

BMI	Age (yr)	% Methacholine Positive	Odds Ratio	95% CI for Odds Ratio	Relative Risk (CI)	Attributable Risk (%)	p Value
<30	44.5 ± 16.4	33.82	1.37	1.03-1.82	1.22 (1.02-1.45)	17.83	.0317
≥30	49.1 ± 14.2	41.16
<35	45.7 ± 16.1	34.24	1.86	1.27-1.76	1.67 (1.17-1.76)	30.43	.0012
≥35	49.1 ± 13.4	49.22
<40	46 ± 16	35.02	2.61	1.48-4.60	1.86 (1.31-2.13)	40.13	.0006
≥40	49.5 ± 11.3	58.49

BMI = body mass index; CI = confidence interval.