Table 3 Characteristics of study participants stratified by gender from Jiangsu Province, China in 2007–2014

Groups

t

P value

Mean

SD

Mean

SD

Body Weight (kg)

67.6

10.4

58.8

9.6

18.189

< 0.001

Height (cm)

167.1

6.5

156.0

5.9

37.303

< 0.001

Body mass index (kg/m²)

24.2

3.2

24.1

3.5

0.116

0.907

n

%

n

%

χ²

P value

Age group (years)

0.218

0.640

 25 ~ 39

88

10.9

109

11.7

 40~

716

89.1

826

88.3

Education level

86.083

< 0.001

 Illiterate

62

23.5

220

16.2

 Primary

274

33.2

310

33.6

 Secondary

342

32.2

301

37.0

 Senior secondary or above

126

11.1

104

13.2

Job

21.310

< 0.001

 Low physical work

376

46.8

484

51.8

 Middle physical work

62

7.7

33

3.5

 High physical work

175

21.8

234

25.0

 Other physical work

191

23.8

184

19.7

Economic status

1.36

0.715

 Low-income

242

30.1

305

32.6

 Middle-income

350

43.5

395

42.2

 High-income

174

21.6

195

20.9

 Other-income

38

4.7

40

4.3

Smoking behavior

590.873

< 0.001

 No

384

47.8

920

98.4

 Yes

420

52.2

15

1.6

Central obesity

0.231

0.631

 No

512

63.7

585

62.6

 Yes

292

36.3

350

37.4

Overweight and obesity

2.877

0.090

 No

392

48.8

494

52.8

 Yes

412

51.2

441

47.2