Table 3 The odds ratios for postmenopausal breast cancer obtained from unconditional logistic regression analysis

a. BMI (kg/m ² )

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/m ² )

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