Table 3.
Odds Ratios (ORs)ᵃ using Dichotomous MBD Classificationᵇ by Ethnic Group and Age
| Unadjusted OR (95% CI)ᶜ |
Statistical Significance (p) | Adjusted OR (95% CI) |
Statistical Significance (p) | ||
|---|---|---|---|---|---|
| Ethnic group | Australian | 1.0 (ref.d) | 1.0 | ||
| Japanese in AUS | 4.8 (3.1-7.4) | <0.0005 | 4.9 (3.1-7.5) | <0.0005 | |
| Japanese in JPN | 15.1 (9.3-24.3) | <0.0005 | 15.8 (9.7-25.7) | <0.0005 | |
| Age | ≥50 | 1.0 (ref.d) | 1.0 | ||
| 40-49 | 1.4 (1.0-1.9) | 0.06 | 1.7 (1.1-2.4) | 0.01 |
a. OR, Odds Ratio of high MBD (b-c category) relative to less MBD (a-b category); b. Two-category scale classification includes “almost entirely fatty or scattered fibroglandular breast tissue” or “heterogeneously or extremely dense breast”; c. 95% CI, 95% confidence interval; d. Reference.