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Table 4 Distribution of age and ZIP code for breast cancer cases, 1985–-2002

From: Spatial variations in the incidence of breast cancer and potential risks associated with soil dioxin contamination in Midland, Saginaw, and Bay Counties, Michigan, USA

  % Diagnosed Breast Cancer Breast Cancer Rates (per 100,000) Odds Ratio 95% CIa P-value
Age (years)      
15–44 12.47 39 1   
45–64 39.81 227 5.81b 1.65, 1.86 <0.0001
65–74 24.46 469 11.94b 2.37, 2.60 <0.0001
≥75 23.26 459 2.45b 2.34, 2.57 <0.0001
ZIP code      
48883 1.30 90 1   
48415 2.35 123 1.28 -0.11, 0.60 0.1699
48457 1.76 108 1.13 -0.25, 0.50 0.5163
48601 11.29 112 1.25 -0.08, 0.52 0.1526
48602 8.93 133 1.39b 0.03, 0.64 0.0309
48603 13.79 171 1.34 -0.01, 0.58 0.0579
48604 3.17 133 1.34 -0.04, 0.63 0.0877
48611 1.46 126 1.22 -0.19, 0.59 0.3160
48616 1.63 110 1.01 -0.37, 0.39 0.9657
48618 1.41 139 1.35 -0.10, 0.69 0.1407
48623 2.32 105 1.15 -0.22, 0.49 0.4546
48626 1.30 112 1.13 -0.28, 0.52 0.5451
48640 12.08 184 1.86b 0.32, 0.92 <.0001
48642 3.82 60 0.63b -0.80, -0.14 0.0047
48650 1.89 127 1.2 -0.19, 0.55 0.3430
48655 1.65 126 1.26 -0.15, 0.61 0.2408
48657 2.17 137 1.35 -0.06, 0.66 0.0982
48706 11.40 138 1.2 -0.12, 0.47 0.2509
48708 7.67 131 1.25 -0.08, 0.53 0.1539
48732 3.58 145 1.22 -0.13, 0.53 0.2356
48734 2.80 183 1.3 -0.09, 0.60 0.1438
48880 2.22 171 1.88b 0.27, 0.98 0.0006
  1. Note: ZIP codes 48640 and 48602 are located in the city of Midland and the confluence area of the Tittabawassee and Saginaw Rivers, respectively. If a simple Bonferroni's adjustment is applied (0.05/21), p < 0.0024 can be used to judge significance. This criterion makes ZIP codes 48640 and 48880 more significant than others.
  2. a CI, confidence interval.
  3. b statistically significant at the 5% significance level.