Table 5

Associations between land use in recharge areas for homogenous drinking water supplies 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
 201
 211
 1.0 (reference)
 1.0 (reference)
.5 to < 1
 234
 184
 1.4 (1.0–1.9)
 1.1 (0.8–1.6)
1 to < 1.5
 139
 122
 1.2 (0.8–1.6)
 0.9 (0.6–1.3)
1.5 to < 2
 99
 90
 1.2 (0.8–1.7)
 0.9 (0.6–1.4)
≥ 2
 9
 16
 0.7 (0.3–1.6)
 0.5 (0.2–1.2)
Commercial
0 to < .5
 587
 533
 1.0 (reference)
 1.0 (reference)
.5 to < 1
 49
 54
 0.9 (0.6–1.4)
 0.8 (0.5–1.3)
1 to < 1.5
 12
 8
 1.6 (0.6–4.1)
 1.7 (0.7–4.4)
1.5 to < 2
 10
 7
 1.4 (0.5–3.9)
 1.4 (0.5–3.7)
2 to < 2.5
 7
 3
 2.6 (0.6–10.3)
 2.3 (0.6–9.3)
2.5 to < 3
 17
 18
 1.0 (0.5–2.0)
 0.9 (0.4–1.8)
Pesticide application area
0 to < .5
 234
 243
 1.0 (reference)
 1.0 (reference)
.5 to < 1
 178
 140
 1.3 (1.0–1.8)
 1.2 (0.8–1.6)
1 to < 1.5
 229
 203
 1.2 (0.9–1.6)
 0.9 (0.7–1.4)
≥ 1.5
 41
 37
 1.2 (0.7–2.0)
 0.9 (0.5–1.6)
Totalc
0 to < .5
 70
 93
 1.0 (reference)
 1.0 (reference)
.5 to < 1
 87
 72
 1.7 (1.1–2.6)
 1.5 (0.9–2.4)
1 to < 1.5
 69
 64
 1.5 (0.9–2.4)
 1.3 (0.7–2.2)
1.5 to < 2
 90
 81
 1.6 (1.0–2.6)
 1.3 (0.7–2.3)
2 to < 2.5
 187
 149
 1.9 (1.3–2.8)
 1.4 (0.8–2.6)
2.5 to < 3
 46
 40
 1.5 (0.9–2.6)
 1.2 (0.6–2.3)
3 to < 3.5
 98
 87
 1.7 (1.1–2.6)
 1.2 (0.6–2.4)
≥ 3.5
 35
 37
 1.4 (0.8–2.5)
 1.0 (0.5–2.2)

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