Table 1 General characteristics of the survey objects (n = 6230)

Gender

 Male

3018

48.44

 Female

3212

51.56

Age

 18–44 yrs

291

4.67

 45-59yrs

1839

29.52

 60 and above

4100

65.81

Ethics

 Han nationality

6179

99.18

 Other nationality

51

0.82

Education level

 Under primary school

1264

20.29

 Primary school

1508

24.21

 Junior high school

1797

28.84

 Senior high school

1205

19.34

 College and above

456

7.32

Occupation

 Fisherman, agricultural, forestry, animal husbandry, fishery and production personnel

2132

34.22

 Staff of enterprises and institutions

434

6.97

 Retired

2082

33.42

 Unemployed

918

14.74

 Other

664

10.66

Marriage

 Unmarried

80

1.28

 Married

5504

88.35

 Divorced

91

1.46

 Widowed

555

8.91

Residential

 Urban areas

3076

49.37

 Rural areas

3154

50.63

^* Insurance

 Medical insurance for urban and rural residents

3898

62.57

 Medical insurance for urban employees

2213

35.52

 Medical assistance

36

0.58

 At one’s own expense

471

7.56

 Commercial insurance

52

0.83

 Public medical care

14

0.22

Smoking

 Yes

946

15.18

 No

5284

84.82

Alcohol drinking

 Yes

984

15.79

 No

5246

84.21

Comorbidity

 Yes

3235

51.93

 No

2995

48.07

^* Treatment

 Lifestyle treatment

4613

74.04

 Oral medicine

5327

85.51

 Insulin injection

2324

37.30

 Traditional Chinese Medicine

517

8.30

 Other

29

0.47

Duration of T2DM

 under five years

2081

33.40

 5–9 years

2092

33.58

 10 years and above

2057

33.02