Correlation between Reduced FEF25-75% and a Positive Methacholine Challenge Test in Adults with Nonobstructive Baseline Spirometry

Table 2

Logistic regression results.

Predictors	value	Odds ratio (95% CI)
Age	0.000	0.95 (0.94-0.97)
Male (vs. female)	0.006	0.56 (0.37-0.85)
BMI	0.839	1.00 (0.97-1.04)
FEV1 (% of predicted)	0.169	1.02 (0.99-1.04)
FEF25-75% (% of predicted)	0.002	0.90 (0.84-0.96)

Outcome = methacholine test result; negative = 0; positive =1.