Table 3.
The odds ratios for postmenopausal breast cancer obtained from unconditional logistic regression analysis
| OR (95%CI) | P | |
| Model 1 | ||
| a. BMI (kg/m2) | ||
| 18.5–24.9 | 1.0 (ref.) | |
| 25–29.9 | 2.53 (1.20–5.35) | 0.01 |
| ≥ 30 | 3.21 (1.15–8.47) | 0.02 |
| Age | 1.03 (0.95–1.10) | 0.44 |
| Age at menopause | 0.98 (0.93–1.03) | 0.43 |
| Family history of breast cancer | ||
| first or second degree | 1.36 (0.71–2.63) | 0.35 |
| Parity | ||
| multiparous | 0.48 (0.17–1.37) | 0.17 |
| b. Height (cm) | ||
| ≤ 157 | 1.0 (ref.) | |
| 158–160 | 0.15 (0.10–0.40) | < 0.0001 |
| 161–164 | 0.10 (0.19–0.32) | < 0.0001 |
| ≥ 165 | 0.08 (0.05–0.21) | < 0.0001 |
| Age | 0.94 (0.87–1.02) | 0.13 |
| Age at menopause | 0.95 (0.91–1.00) | 0.09 |
| Family history of breast cancer | ||
| first or second degree | 1.36 (0.68–2.73) | 0.38 |
| Parity | ||
| multiparous | 0.20 (0.06–0.65) | 0.01 |
| c. Weight (Kg) | ||
| ≤ 62 | 1.0 (ref.) | |
| 63–67 | 1.02 (0.20–2.09) | 0.67 |
| 68–75 | 1.13 (0.40–2.43) | 0.54 |
| ≥ 76 | 1.26 (0.42–2.82) | 0.47 |
| Age | 1.08 (1.00–1.17) | 0.03 |
| Age at menopause | 0.98 (0.93–1.03) | 0.44 |
| Family history of breast cancer | ||
| first or second degree | 1.35 (0.71–2.59) | 0.36 |
| Parity | ||
| multiparous | 0.45 (0.16–1.32) | 0.15 |
| Model 2 | ||
| a. BMI (kg/m2) | 1.15 (1.03–1.30) | 0.02 |
| Age | 0.99 (0.92–1.08) | 0.99 |
| Age at menopause | 0.97 (0.93–1.02) | 0.32 |
| Family history of breast cancer | ||
| first or second degree | 1.46 (0.76–2.81) | 0.25 |
| Parity | ||
| multiparous | 0.40 (0.14–1.14) | 0.08 |
| b. Height (cm) | 0.73 (0.65–0.82) | < 0.0001 |
| Age | 0.95 (0.88–1.02) | 0.16 |
| Age at menopause | 0.97 (0.92–1.02) | 0.30 |
| Family history of breast cancer | ||
| first or second degree | 1.43 (0.71–2.86) | 0.31 |
| Parity | ||
| multiparous | 0.34 (0.11–1.04) | 0.06 |
| c. Weight (Kg) | 1.00 (0.93–1.06) | 0.88 |
| Age | 1.07 (0.99–1.16) | 0.08 |
| Age at menopause | 0.98 (0.93–1.03) | 0.47 |
| Family history of breast cancer | ||
| first or second degree | 1.38 (0.73–2.63) | 0.32 |
| Parity | ||
| multiparous | 0.47 (0.17–1.31) | 0.14 |
Model 1: BMI, height, and weight independently were entered into the model as categorical data while adjusted for age, age at menopause, family history of breast cancer and parity.
Model 2: BMI, height, and weight independently were entered into the model as continuous data while adjusted for age, age at menopause, family history of breast cancer and parity.