Table 2.

Odds of Idiopathic Pulmonary Fibrosis among Male Vietnam Veterans with Agent Orange Exposure versus No Agent Orange Exposure

	Odds Ratio (95% Confidence Interval)	P Value
Overall unadjusted	1.14 (1.12–1.16)	<0.001
Overall adjusted	1.08 (1.06–1.10)	<0.001

Adjusted multivariable regression controlled for known idiopathic pulmonary fibrosis risk factors (age at the beginning of the study, race, ethnicity, smoking history, and rurality) and interactions between Agent Orange × age and Agent Orange × smoking.