Table 2 Sociodemographic descriptive statistics of participants (N=2830)

Gender

Male

1098

38.80

Female

1732

61.20

Age(years)

Under 20

279

9.86

21–30

957

33.82

31–40

508

17.95

41–50

553

19.54

51–60

390

13.78

61 and above

139

4.91

Missing ^a

4

0.14

Residence

Urban

1743

61.59

Rural

1087

38.41

Province of residence

Chongqing Municipality

1397

49.36

Shanxi Provinces

322

11.38

Sichuan Provinces

318

11.24

Hebei Provinces

147

5.19

Shandong Provinces

133

4.70

Others

513

18.13

Ethnicity

Han

2741

96.86

Ethnic minorities

89

3.14

Education background

Elementary school or below

78

2.76

Junior high school

412

14.56

Senior high school/Vocational high school/Technical secondary school

596

21.06

Junior college

595

21.02

Bachelor’s degree or above

1149

40.60

Marital status

Unmarried

1018

35.97

Married

1688

59.65

Divorced

105

3.71

Widowed

19

0.67

Employment status

Employed

1603

56.64

Retirement

296

10.46

Internal student

560

19.79

Jobless

371

13.11

Self-rated economic status

Very bad

105

3.71

Bad

358

12.65

General

1768

62.47

Good

439

15.51

Very good

160

5.65

Chronic illness

Yes

225

7.95

No

2605

92.05

Self-rated health

Very bad

25

0.88

Bad

55

1.94

General

707

24.98

Good

1273

44.98

Very good

770

27.21