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, 2004–2008a.
| 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)b | 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 | ||||
| Positiveb | 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 | ||||
| Otherb | 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 | ||||
| Ib | 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) |
aAll variables in each column are mutually adjusted for each other.
bReferent Category.