Table 5.

Hazard ratios (HR) and 95% confidence intervals (CI) for breast cancer associated with lifetime exposure by menopause status

	Pre-menopausal Breast Cancer		Post-menopausal Breast Cancer
	Cases n = 450	HR1	Cases n = 1,505	HR1
Acids
Ever Use	24	1.3 (0.9, 2.1)	51	1.0 (0.8, 1.4)
Never Use	425	1.0	1,454	1.0
Dyes or inks
Ever Use	26	1.4 (0.9, 2.1)	72	1.0 (0.8, 1.3)
Never Use	424	1.0	1,433	1.0
Gasoline or other petroleum products
Ever Use	19	0.7 (0.4, 1.2)	45	0.9 (0.6, 1.2)
Never Use	430	1.0	1,460	1.0
Glues or adhesives
Ever Use	34	1.1 (0.8, 1.6)	109	0.9 (0.7, 1.1)
Never Use	416	1.0	1,396	1.0
Lubricating oils
Ever Use	7	0.6 (0.3, 1.3)	33	1.0 (0.7, 1.5)
Never Use	443	1.0	1,471	1.0
Metals
Ever Use	20	1.2 (0.8, 2.0)	44	0.9 (0.6, 1.2)
Never Use	430	1.0	1,460	1.0
Paints
Ever Use	28	1.0 (0.6, 1.4)	86	1.0 (0.8, 1.2)
Never Use	422	1.0	1,418	1.0
Pesticides
Ever Use	12	1.5 (0.8, 2.7)	18	0.9 (0.6, 1.5)
Never Use	438	1.0	1,486	1.0
Soldering materials
Ever Use	15	1.8 (1.1, 3.0)	33	1.4 (0.9, 2.1)
Never Use	435	1.0	1,472	1.0
Solvents
Ever Use	32	1.3 (0.9, 1.9)	73	1.0 (0.8, 1.3)
Never Use	414	1.0	1,424	1.0
Stains
Ever Use	8	1.1 (0.6, 2.2)	20	0.7 (0.5, 1.1)
Never Use	442	1.0	1,485	1.0
Total number of agents
2+ agents	58	1.2 (0.9, 1.6)	137	0.9 (0.7, 1.1)
1 agent	70	1.1 (0.8, 1.5)	216	1.0 (0.9, 1.2)
Never Use	322	1.0	1,152	1.0
		p value for trend2 0.69		p value for trend2 0.18

¹Hazard ratios are adjusted for race/ethnicity, education, income, parity and age at first birth

²Test for trend among exposed only

Note: Differences in the total numbers are due to missing values