Table 3.

Risk factors associated with incident idiopathic pulmonary fibrosis among female Veterans

	Broad Case Definition IPF: n = 9,513 Non-IPF: n = 918,867		Narrow Case Definition IPF: n = 5,776 Non-IPF: n = 918,867
	Odds Ratio (95% CI)	P Value	Odds Ratio (95% CI)	P Value
Age
⩽60 yr	(Reference)		(Reference)
>60–70 yr	4.19 (3.95–4.44)	<0.001	4.72 (4.38–5.09)	<0.001
>70–80 yr	5.61 (5.15–6.10)	<0.001	6.33 (5.69–7.03)	<0.001
>80 yr	3.70 (3.35–4.09)	<0.001	2.99 (2.58–3.45)	<0.001
Race
White	(Reference)		(Reference)
Black or African American	0.86 (0.80–0.92)	<0.001	0.87 (0.80–0.95)	0.002
Asian/Native Hawaiian or Pacific Islander/American Indian	0.75 (0.64–0.89)	0.001	0.81 (0.66–0.99)	0.047
Ethnicity
Hispanic or Latino	(Reference)		(Reference)
Not Hispanic or Latino	1.20 (1.05–1.37)	0.007	1.18 (1.0–1.4)	0.051
Tobacco Use	2.79 (2.64–2.96)	<0.001	3.47 (3.22–3.74)	<0.001
Rural Residence	1.24 (1.17–1.31)	<0.001	1.20 (1.12–1.29)	<0.001

Definition of abbreviations: CI = confidence interval; IPF = idiopathic pulmonary fibrosis.