Table 3.

Multivariate logistic regression for predictors of asthma among subjects with COPD:

Variable	OR [CI]	p-value
African-American race	2.05 [1.31, 3.21]	0.002
Female gender	0.94 [0.63, 1.40]	0.76
Older age (per decade)	0.76 [0.60, 0.97]	0.03
Pack years of smoking (per 10 pack years)	0.86 [0.78, 0.95]	0.002