Table 4

Associations between land use in recharge areas for drinking water wells and breast cancer.
Fraction of Recharge Area in Specified Land Use
 Cases
 Controls
 Adjusted OR (95% CI)a
 Adjusted OR (95% CI)b
Residential
0 to < .5
 252
 262
 1.0 (reference)
 1.0 (reference)
.5 to < 1
 243
 195
 1.3 (1.0–1.7)
 1.1 (0.8–1.5)
1 to < 1.5
 157
 136
 1.2 (0.9–1.6)
 0.9 (0.7–1.3)
1.5 to < 2
 125
 106
 1.3 (0.9–1.7)
 1.0 (0.7–1.4)
≥ 2
 47
 46
 1.1 (0.7–1.7)
 0.8 (0.5–1.4)
Commercial
0 to < .5
 671
 611
 1.0 (reference)
 1.0 (reference)
.5 to < 1
 58
 61
 0.9 (0.6–1.4)
 0.8 (0.6–1.3)
1 to < 1.5
 17
 16
 1.1 (0.5–2.2)
 1.2 (0.6–2.4)
1.5 to < 2
 19
 11
 1.7 (0.8–3.7)
 1.7 (0.8–3.6)
2 to < 2.5
 10
 5
 2.1 (0.7–6.4)
 2.0 (0.7–6.2)
2.5 to < 3
 25
 22
 1.2 (0.7–2.2)
 1.1 (0.6–2.0)
≥ 3
 24
 19
 1.2 (0.6–2.2)
 1.0 (0.5–1.9)
Pesticide application area
0 to < .5
 303
 309
 1.0 (reference)
 1.0 (reference)
.5 to < 1
 240
 187
 1.3 (1.0–1.7)
 1.1 (0.8–1.5)
1 to < 1.5
 238
 211
 1.2 (0.9–1.6)
 0.9 (0.7–1.3)
≥ 1.5
 43
 38
 1.2 (0.8–2.0)
 1.0 (0.6–1.6)
Totalc
0 to < .5
 86
 112
 1.0 (reference)
 1.0 (reference)
.5 to < 1
 120
 101
 1.6 (1.1–2.4)
 1.4 (0.9–2.2)
1 to < 1.5
 75
 72
 1.4 (0.9–2.2)
 1.2 (0.8–2.0)
1.5 to < 2
 95
 84
 1.6 (1.0–2.4)
 1.3 (0.8–2.2)
2 to < 2.5
 196
 155
 1.8 (1.2–2.6)
 1.4 (0.8–2.4)
2.5 to < 3
 51
 48
 1.4 (0.9–2.4)
 1.1 (0.6–2.1)
3 to < 3.5
 109
 97
 1.6 (1.1–2.4)
 1.2 (0.7–2.2)
≥ 3.5
 92
 76
 1.7 (1.1–2.7)
 1.4 (0.8–2.4)

a Adjusted for diagnosis/reference year, age at diagnosis/reference year, birth decade, study, vital status, previous breast cancer diagnosis, age at first birth, family history of breast cancer, and education.

b Adjusted for variables in analysis [a] and years on Cape Cod and years on the Cape squared.

c Residential plus pesticide use area plus commercial.

Brody et al. Environmental Health: A Global Access Science Source 2006 5:28   doi:10.1186/1476-069X-5-28