Table 4.

Association of interstitial lung abnormality as a predictor of lung cancer in COPD patients

	OR (95% CI)	P-value
Interstitial lung abnormality
Present vs none	17.7 (5.1–72.5)	<0.0001
With emphysema vs others	32.2 (8.9–138.2)	<0.0001

Note: Analyses used multivariate logistic analysis adjusted by gender, age, and pack-years.

Abbreviations: COPD, chronic obstructive pulmonary disease; OR, odds ratio; CI, confidence interval.