Table 1 Characteristics of study population by age at menarche

n

488

583

352

Current age (years)

40.91±11.68^a

42.12 ± 12.92

42.72 ± 13.57

0.04

BMI (kg/m²)

21.43 ± 4.94

21.96 ± 4.01

22.26 ± 4.05

0.08

Number of pregnancies

3.50 ± 2.13

3.44 ± 2.08

3.36 ± 2.03

0.35

Currently married (%)

80.94

88.16

94.32

<0.01

Ever use of contraceptives (yes, %)

19.67

17.50

19.03

0.74

Use of tobacco products (ever, %)

31.56

19.04

7.10

<0.01

Education (illiterate, %)

52.05

54.37

59.66

0.03

Waist circumference (cm)

77.20 ± 9.32

76.96 ± 8.86

76.38 ± 7.90

0.19

Fasting blood glucose (mmol/L)

5.81 ± 2.12

6.29 ± 2.99

6.78 ± 4.65

<0.01

Triglyceride (mg/dL)

131.5 ± 102.8

130.5 ± 105.4

127.9 ± 119.2

0.03

HDL cholesterol (mg/dL)

36.54 ± 18.7

40.89 ± 31.05

48.71 ± 42.40

<0.01

Systolic blood pressure (mmHg)

115.46 ± 20.26

116.73 ± 21.74

116.70 ± 19.46

0.28

Diastolic blood pressure (mmHg)

74.53 ± 10.00

75.74 ± 10.34

75.29 ± 10.53

0.23

Metabolic syndrome (%)

26.14

25.73

22.13

0.16