Table 1 Participant characteristics

Age(year)

30(27,33)

28(26,31)

< 0.001***

BMI (kg//m²)

23.3(20.9,27.02)

25.1(21.6,28.5)

0.001**

WHR

0.81(0.78,0.86)

0.84(0.79,0.88)

0.01*

HOMA-IR

2.5(1.44,3.63)

2.4(1.61,3.67)

0.827

HOMA-B

142.19(81.2,229.82)

148.94(103.06,220.82)

0.592

PRL (ng/mL)

10.9(8.62,16)

11.15(8.44,14.88)

0.699

LH (mIU/mL)

3.84(2.43,5.32)

6.56(3.72,11.22)

< 0.001***

FSH (mIU/mL)

6.19(4.93,7.7)

5.83(4.82,7.06)

0.1

LH/FSH

0.63(0.42,0.89)

1.18(0.67,1.86)

< 0.001***

E2(pmol/L)

160(116.75,208.75)

183(136.25,240)

< 0.001***

A2(nmol/L)

7.39(5.32,10.2)

12.7(8.79,16.8)

< 0.001***

T^b(nmol/L)

0.69(0.69,0.82)

1.06(0.69,1.52)

< 0.001***

TSH (mIU/L)

2.01(1.39,2.79)

2.1(1.5,2.91)

0.339

TG (mmol/L)

0.91(0.74,1.41)

1.29(0.87,1.87)

< 0.001***

HDL (mmol/L)

1.27(1.1,1.43)

1.21(1.06,1.42)

0.202

SAS

41.25(35,46.25)

43.75(38.75,50)

< 0.001***

SDS

43.75(36.25,50)

46.25(38.75,55)

< 0.001***

PSS

24(19,28.5)

25(20,30)

0.026*

Education

0.475

 Primary school and below

4 (2.35%)

23 (3.97%)

 Middle school

67 (39.41%)

242 (41.72%)

 College and above

99 (58.24%)

315 (54.31%)

Income

40,000 (20,000, 60,000)

40,000 (30,000, 60,000)

0.150

Birthplace

0.228

 North China

45 (71.43%)

275 (63.66%)

 Non-North China

18 (28.57%)

157 (36.34%)

Work

0.751

 Mental work

24 (37.5%)

50 (35.21%)

 Physical work

40 (62.5%)

92 (64.79%)