Table 6. Multivariate logistic model on 366 breast cancer cases.
| BMI category (kg/m2) | HR | 95% CI | p-value |
|---|---|---|---|
| Overweight (25–29.9) | |||
| Receptor status | |||
| ER+/PR+ | Ref. | - | - |
| Other receptor status* | 1.09 | 0.54–2.18 | 0.798 |
| Age at diagnosis | |||
| 59 ± 5.3 yr (normal weight) | Ref. | - | - |
| 62 ± 4.6 yr | 1.02 | 0.96–1.07 | 0.529 |
| Stage | |||
| I | Ref. | - | - |
| II | 0.65 | 0.35–1.20 | 0.175 |
| III | 0.75 | 0.28–2.00 | 0.567 |
| Obese ≥ 30 | |||
| Receptor status | |||
| ER+/PR+ | Ref. | - | - |
| Other receptor status* | 0.91 | 0.38–2.19 | 0.840 |
| Age at diagnosis | |||
| 59 ± 5.3 yr (normal weight) | Ref. | - | - |
| 63 ± 5.2 yr | 1.04 | 0.97–1.11 | 0.185 |
| Stage | |||
| I | Ref. | - | - |
| II | 2.79 | 1.42–5.49 | 0.003 |
| III | 2.33 | 0.81–6.71 | 0.115 |
BMI=body mass index; HR=hazard ratio; CI=confidence interval; ER= estrogen receptor; PR=progesterone receptor; Ref.=reference category.
*Other receptor status=ER+/PR–; ER–/PR+; ER–/PR–.