Table 4.
Hazard ratio of premenopausal breast cancer associated with selected trajectories of lifetime body fatness factors
| Birthweight | Somatotype at age 5 | Somatotype at age 10 | BMI at age 18 (kg/m2) | Current BMI (kg/m2) | Hazard ratio | 95% CI |
|---|---|---|---|---|---|---|
| >=3.9kg | Diagram 1 | Diagram 1 | < 18.5 | < 20 | 1.00 | – |
| <2.5kg | Diagram 5–9 | Diagram 5–9 | ≥ 27.5 | ≥27.5 | 0.28 | (0.17–0.46) |
| 2.5–3.1kg | Diagram 4 | Diagram 4 | 25–27.4 | 25–27.4 | 0.51 | (0.33–0.77) |
| 3.2–3.8kg | Diagram 3 | Diagram 3 | 22.5–24.9 | 22.5–24.9 | 0.68 | (0.48–0.96) |
| 3.2–3.8kg | Diagram 2 | Diagram 2 | 20–22.4 | 20–22.4 | 0.60 | (0.43–0.83) |
| 3.2–3.8kg | Diagram 2 | Diagram 2 | 18.5–19.9 | 20–22.4 | 0.65 | (0.47–0.92) |