Breast Cancer by Age at Diagnosis in the Gharbiah, Egypt, Population-Based Registry Compared to the United States Surveillance, Epidemiology, and End Results Program, 2004–2008
Table 2
Odds ratios and 95% confidence intervals from age stratified logistic regression models examining the relationship between country of residence and breast cancer characteristics, Egypt’s GCR, and US SEER cases, 2004–2008.
Variable
Odds ratio (95% confidence interval)
Model 1: all ages combined
Model 2: ≤40 Years of age
Model 3: 41–55 Years of age
Model 4: ≥56 Years of age
Age (continuous)
0.95 (0.94–0.95)
—
—
—
Grade
Low (I/II)
1.00
1.00
1.00
1.00
High (III/IV)
0.05 (0.04–0.06)
0.04 (0.02–0.06)
0.05 (0.04–0.06)
0.07 (0.05–0.10)
Hormone Receptor
Positive
1.00
1.00
1.00
1.00
Negative
1.95 (1.72–2.22)
1.67 (1.26–2.22)
2.19 (1.83–2.62)
1.87 (1.50–2.33)
Histology
Other
1.00
1.00
1.00
1.00
Duct, NOS
4.30 (3.65–5.07)
2.61 (1.82–3.75)
4.62 (3.64–5.88)
5.37 (4.02–7.19)
AJCC stage Group
I
1.00
1.00
1.00
1.00
II
12.04 (9.69–14.97)
10.57 (5.84–19.13)
10.99 (8.14–14.85)
14.93 (10.29–21.65)
III
44.55 (35.84–55.38)
31.57 (17.43–57.19)
40.96 (30.35–55.28)
64.68 (44.65–93.70)
IV
16.04 (11.97–21.50)
16.53 (8.12–33.64)
11.87 (7.56–18.64)
21.23 (13.16–34.28)
All variables in each column are mutually adjusted for each other. Referent Category.
