Table 4.

Odds of Idiopathic Pulmonary Fibrosis among Male Vietnam Veterans with Agent Orange Exposure versus No Agent Orange Exposure (Sensitivity Analysis)

		N	Odds Ratio (95% Confidence Interval)	P Value
Restricted to army	IPF: 38,326	No IPF: 1,854,591	Unadjusted, 1.15 (1.13–1.18);	<0.001;
			Adjusted, 1.13 (1.09–1.17)	<0.001
Restricted to most specific IPF ICD codes	IPF: 8,818	No IPF: 3,569,901	Unadjusted, 1.17 (1.12–1.23);	<0.001;
			Adjusted, 1.11 (1.05–1.17)	<0.001
Restricted to army + most specific IPF ICD codes	IPF: 4,620	No IPF: 1,854,591	Unadjusted, 1.23 (1.16–1.31);	<0.001;
			Adjusted, 1.17 (1.09–1.25)	<0.001

Definition of abbreviations: ICD = International Classification of Disease; IPF = idiopathic pulmonary fibrosis.

Adjusted multivariable regression controlled for age, race, ethnicity, smoking history, and rurality and accounted for interactions between Agent Orange × age and Agent Orange × smoking in the model.