Indoor air pollution exposure from use of indoor stoves and fireplaces in association with breast cancer: a case-control study

Table 2 Association between indoor stove/fireplace use and breast cancer risk ^a

Exposure Status	Controls	Cases	Age-adjusted OR (95% CI)	Multivariable-adjusted OR (95% CI)^b
Exposure Status	N (%)	N (%)	Age-adjusted OR (95% CI)	Multivariable-adjusted OR (95% CI)^b
Ever use of any indoor stove/fireplace ^c
Never	781 (50.4)	757 (50.3)	1.00 (ref)	1.00 (ref)
Ever	768 (49.4)	747 (49.5)	1.05 (0.91, 1.21)	1.05 (0.88, 1.25)
Material burned ^d
None	781 (50.4)	757 (50.3)	1.00 (ref)	1.00 (ref)
Wood	699 (45.1)	674 (44.8)	0.93 (0.79, 1.08)	0.93 (0.77, 1.12)
Synthetic Logs	202 (13.0)	246 (16.4)	1.45 (1.17, 1.80)	1.42 (1.11, 1.84)
Coal	76 (4.9)	87 (5.8)	1.27 (0.92, 1.76)	1.28 (0.88, 1.86)
Gas	22 (1.4)	22 (1.5)	1.08 (0.59, 1.96)	0.86 (0.42, 1.73)

^aAmong Long Island, NY women, LIBCSP 1996-1997.
^bMultivariate OR adjusted for age, age at menarche, history of breastfeeding, hormone therapy use, family history of breast cancer, parity, age at first birth, BMI at reference, education, smoking history, alcohol intake, physical activity, race, religion, marital status.
^cUse of any indoor stove or fireplace regardless of the material used.
^dMaterials burned categories are not mutually exclusive. Wood burning excludes synthetic logs.

ISSN: 1476-069X