Table 1 Characteristics of participants by menstrual cycle pattern

Age (year) ^a

31.6 (2.6)

30.9 (2.4)

0.11

Anthropometrics ^a

Body mass index (kg/m²)

24.8 (5.0)

24.5 (5.9)

0.77

Waist circumference (cm)

78.8 (11.4)

77.8 (13.3)

0.65

Waist-hip ratio

0.757(0.062)

0.760 (0.061)

0.75

Married ^b %

62

56

0.44

Parous ^b %

54

49

0.50

Current smoker ^b %

15

13

0.73

Physical activity (PA) ^c

Pedometer steps (per day)

8331 (6758-10623)

8325 (6715-10992)

0.68

Leisure time PA (min/week)

120 (0-219)

66 (0-180)

0.24

Total PA (min/week)

680 (385-1030)

560 (300-970)

0.27

Hormonal factors ^c

Testosterone (nmol/L)

1.50 (1.22-1.86)

1.53 (1.35-1.89)

0.24

SHBG (nmol/L)

50.3 (35.8-68.0)

43.6 (30.1-54.6)

0.01

Free androgen index

2.94 (2.00-4.47)

4.22 (2.60-6.24)

0.01

Insulin (mU/l)

3.9 (5.3-7.5)

3.5 (4.9-7.9)

0.85

Quantitative ultrasound ^c:

BUA (dB/MHz)

73.6 (65.4-84.6)

78.7 (67.9-87.1)

0.10

SOS (m/s)

1563 (1543-1587)

1569 (1557-1606)

0.02

QUI (%)

99.5 (88.6-114.1)

106.7 (94.6-121.6)

0.03