Table 2 Adjusted odds ratios for breast cancer and reported cleaning product use, Cape Cod, Massachusetts, 1988-1995

Combined cleaning product use

   Quartile 1

91

99

1.0

Reference

   Quartile 2

100

107

1.1

0.8, 1.7

   Quartile 3

112

125

1.1

0.7, 1.7

   Quartile 4

104

70

2.1

1.4, 3.3

0.003

Combined air freshener use (sprays and solids)

   Quartile 1

74

77

1.0

Reference

   Quartile 2

113

117

1.1

0.7, 1.7

   Quartile 3

123

138

1.0

0.7, 1.6

   Quartile 4

101

71

1.9

1.2, 3.0

0.02

Air freshener spray

   Never use

90

95

1.0

Reference

   Any use

322

308

1.2

0.9, 1.8

   < Once a month

83

88

1.1

0.7, 1.7

   Monthly

47

41

1.3

0.8, 2.3

   Weekly

114

110

1.3

0.8, 1.9

   Daily

78

69

1.3

0.8, 2.1

0.15

Solid air freshener

   Never use

259

288

1.0

Reference

   Any use

153

115

1.7

1.2, 2.3

   < 2 times/year

50

41

1.4

0.9, 2.2

   2-6 times/year

77

58

1.7

1.2, 2.6

   ≥ 7 times/year

26

16

2.0

1.0, 4.0

0.001

Oven cleaner

   Never use

33

33

1.0

Reference

   Any use

379

370

1.0

0.6, 1.7

   < 2 times/year

145

143

1.0

0.6, 1.8

   2-6 times/year

199

196

1.0

0.6, 1.7

   ≥ 7 times/year

35

31

1.2

0.6, 2.3

0.80

Surface cleaner

   Never use

53

54

1.0

Reference

   Any use

359

348

1.1

0.7, 1.7

   < Once a month

61

60

1.0

0.6, 1.6

   Monthly

57

57

1.0

0.6, 1.8

   Weekly

186

171

1.2

0.8, 1.9

   Daily

55

60

1.2

0.7, 2.2

0.22

Mold/mildew control

   Never use

296

322

1.0

Reference

   Any use

114

81

1.7

1.2, 2.3

Mold/mildew control with bleach

   Never use

320

334

1.0

Reference

   Any use

90

68

1.5

1.0, 2.1

   < Once a month

47

38

1.2

0.8, 2.0

   Monthly

14

11

1.5

0.7, 3.5

   ≥ Weekly

29

19

2.0

1.1, 3.8

0.02