Table 2 Univariate analysis of the quality of reproductive life in the case group (n = 250)

Age (years)

≤ 32

150(60.00)

66.90 ± 10.85

Ref

> 32

100(40.00)

65.54 ± 13.13

-1.359

1.526

-4.364

1.645

Nationality

Han nationality

199(79.60)

66.22 ± 11.08

Ref

Minority

51(20.40)

66.87 ± 14.43

0.664

1.857

-2.993

4.322

Fertility history

No

230(92.00)

65.87 ± 11.82

Ref

Yes(≥1)

20(8.00)

72.01 ± 10.37

6.139

2.732

0.759

11.519^*

Body mass index

≤ 18.5

4(1.60)

60.81 ± 3.33

Ref

18.5 ∼ 23.9

60(24.00)

64.16 ± 11.04

3.355

6.068

-8.597

15.307

24 ∼ 27.9

113(45.20)

66.28 ± 12.20

5.475

5.978

-6.301

17.250

≥ 28

73(29.20)

68.58 ± 11.82

7.775

6.034

-4.110

19.660

Past medical history

Yes

35(16.30)

60.56 ± 14.15

Ref

No

215(83.70)

67.30 ± 11.14

6.743

2.114

2.579

10.908^**

Diseases

sexually transmitted disease

1(0.40)

71.88

5.540

11.854

-17.808

28.888

Genitourinary infections

5(1.90)

67.40 ± 16.21

1.073

4.890

-8.559

10.705

diabetes

2(0.80)

69.14 ± 7.92

2.806

8.401

-13.740

19.352

Hypothyroidism or hyperthyroidism

2(0.80)

50.65 ± 32.59

-15.833

8.342

-32.264

0.598

history of liver disease

13(5.20)

62.84 ± 10.59

-3.71

3.363

-10.334

2.914

hypertensive

6(2.30)

60.04 ± 13.01

-6.494

4.519

-15.394

2.405

Gastrointestinal diseases

3(1.20)

47.40 ± 19.14

-19.192

6.766

-32.518

-5.866^**

hormone abnormality

1(0.40)

74.74

8.416

11.847

-14.918

31.75

cryptorchidism

2(0.80)

63.28 ± 4.42

-3.101

8.400

-19.646

13.445

Orchitis, epididymitis

7(2.80)

60.04 ± 11.44

-6.494

4.519

-15.394

2.405

No

215(83.70)

67.30 ± 11.14

Ref

Smoking

Yes

106(42.40)

66.21 ± 12.13

Ref

No

144(57.60)

66.47 ± 11.62

0.256

1.515

-2.727

3.239

Drinking

Yes

85(34.00)

65.51 ± 13.36

Ref

No

165(66.00)

66.80 ± 10.95

1.291

1.578

-1.818

4.399

Exercise

Never or occasionally

122(48.80)

65.37 ± 12.21

Ref

1–2 times/week

89(35.60)

67.92 ± 11.49

2.546

1.648

-0.701

5.792

3–4 times/week

26(10.40)

66.08 ± 11.89

0.703

2.554

-4.328

5.733

≥ 5 times/week

13(5.20)

65.46 ± 10.07

0.092

3.450

-6.703

6.886

Sleep

≤ 6 h

40(16.00)

62.28 ± 13.17

Ref

>6 h

210(84.00)

67.13 ± 11.40

4.856

2.018

0.880

8.831^*

Marital status

Unmarried

0(0.00)

0.00 ± 0.00

Married

249(99.60)

66.40 ± 11.82

10.148

11.842

-13.176

33.472

Divorced

1(0.40)

56.25

Ref

Place of residence

City

217(86.80)

66.21 ± 11.95

Ref

Rural

33(13.20)

67.32 ± 10.97

1.111

2.21

-3.242

5.464

Education level

Junior high school and below

20(8.00)

63.48 ± 15.51

Ref

High school/Secondary school

55(22.00)

64.39 ± 12.37

0.913

3.076

-5.147

6.972

College/Undergraduate

163(65.20)

67.46 ± 11.15

3.983

2.791

-1.516

9.481

Master’s degree and above

12(4.80)

65.21 ± 10.33

1.736

4.302

-6.738

10.210

Occupation

Institutions and establishments

61(24.40)

65.78 ± 11.89

0.708

2.108

-3.446

4.861

Enterprise employee

63(25.20)

67.29 ± 9.96

2.216

2.091

-1.904

6.336

Commercial service workers

13(5.20)

67.91 ± 10.23

2.838

3.576

-4.206

9.882

Healthcare workers

6(2.40)

70.14 ± 6.27

5.068

5.015

-4.812

14.947

Educator

6(2.40)

59.68 ± 18.23

-5.392

5.015

-15.272

4.487

Transportation staff

12(4.80)

69.49 ± 9.55

4.417

3.697

-2.867

11.700

Private sector employees

6(2.40)

69.36 ± 13.81

4.287

5.015

-5.593

14.166

Self-employed

7(2.80)

59.82 ± 14.12

-5.25

4.677

-14.462

3.963

Unemployed

1(0.40)

47.92

-17.154

11.831

-40.461

6.152

Labour

4(1.60)

65.36 ± 6.03

0.293

6.052

-11.630

12.217

Agriculture, fisheries and animal husbandry

8(3.20)

74.80 ± 7.48

9.734

4.406

1.055

18.413^*

Others

63(25.20)

65.07 ± 13.56

Ref

Monthly household income (yuan)

< 4000

48(19.20)

64.43 ± 14.38

Ref

4000∼

103(41.20)

65.38 ± 10.45

0.951

2.057

-3.100

5.003

7000∼

56(22.40)

68.14 ± 11.74

3.715

2.315

-0.845

8.275

10,000∼

43(17.20)

68.54 ± 11.60

4.112

2.471

-0.756

8.980

Exposure to harmful environments

Yes

52(20.80)

62.39 ± 10.90

Ref

No

198(79.20)

67.40 ± 11.85

5.003

1.817

1.425

8.581^**

Type of medical insurance

Yes

96(38.40)

69.05 ± 10.53

Ref

No

154(61.60)

64.68 ± 12.28

-4.373

1.514

-7.355

-1.391^**

Social support

0.621

0.105

0.414

0.829^***

Mindfulness

0.270

0.058

0.157

0.383^***

Fertility pressures

-0.108

0.028

-0.163

-0.052^***