Association between Latitude and Breast Cancer Incidence in Mainland Australian Women
Table 3
Multiple logistic regression models showing odds ratio of breast cancer and of cutaneous melanoma relative to reference category after adjusting for all other variables in the model.
Breast cancer
Cutaneous melanoma
OR (95% CI)
P
OR (95% CI)
P
Age group (years)
20–29
0.02 (0.02-0.03)
<0.001
0.28 (0.25–0.32)
<0.001
30–39
0.18 (0.16–0.19)
<0.001
0.48 (0.43–0.53)
<0.001
40–49
0.61 (0.58–0.64)
<0.001
0.70 (0.64–0.77)
<0.001
50–591
1.00
1.00
60–69
1.27 (1.21–1.34)
<0.001
1.35 (1.24–1.47)
<0.001
70–79
1.20 (1.14–1.28)
<0.001
1.81 (1.66–1.98)
<0.001
80–89
1.36 (1.27–1.45)
<0.001
1.74 (1.57–1.93)
<0.001
IRSD2 (quintiles)
1
1.00
1.00
2
0.99 (0.89–1.10)
0.824
1.16 (0.98–1.38)
0.087
3
1.07 (0.97–1.18)
0.158
1.29 (1.10–1.52)
0.002
4
1.03 (0.94–1.14)
0.521
1.28 (1.09–1.51)
0.003
5
1.16 (1.05–1.27)
0.003
1.39 (1.18–1.63)
<0.001
ARIA3
Major city1
1.00
1.00
Inner regional
1.03 (0.98–1.08)
0.289
1.30 (1.20–1.39)
<0.001
Outer regional and beyond
1.05 (0.98–1.13)
0.136
1.16 (1.06–1.28)
0.001
Latitude
30°S1
1.00
1.00
30°S
1.92 (1.84–2.01)
<0.001
0.65 (0.61–0.68)
<0.001
OR: odds ratio. CI: confidence interval. 1Reference category. 2IRSD: Index of Relative Socioeconomic Disadvantage. 3ARIA: Accessibility/Remoteness Index of Australia. P = significant at 95% CI.
