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Table 1 General characteristics of the subjects

From: Vitamin D status and associated occupational factors in Korean wage workers: data from the 5th Korea national health and nutrition examination survey (KNHANES 2010–2012)

 

Male

Female

Total

N*

%

N

%

N

%

Total (N)

2868

2541

5409

Age (years)

20-29

385

13.4%

548

21.6%

933

17.2%

30-39

903

31.5%

630

24.8%

1533

28.3%

40-49

793

27.6%

630

24.8%

1423

26.3%

50-65

787

27.4%

733

28.8%

1520

28.1%

Body mass index (BMI) (n = 5393)

<23

1040

36.4%

1472

58.1%

2512

46.6%

23-25

741

25.9%

489

19.3%

1230

22.8%

≥25

1077

37.7%

574

22.6%

1651

30.6%

Dietary supplementation (n = 4590)

Yes

922

40.3%

1182

51.4%

2104

45.8%

No

1368

59.7%

1118

48.6%

2486

54.2%

Physical activity

Yes

254

8.9%

223

8.8%

477

8.8%

No

2614

91.1%

2317

91.2%

4931

91.2%

Drinking

Yes

2249

78.4%

1252

49.3%

3501

64.7%

No

619

21.6%

1289

50.7%

1908

35.3%

Smoking status

None/ex-smoker

1553

54.1%

2372

93.3%

3925

72.6%

Current smoker

1315

45.9%

169

6.7%

1484

27.4%

Marital status

Married

2324

81.0%

1910

75.2%

4234

78.3%

Unmarried

544

19.0%

631

24.8%

1175

21.7%

Income (quartile)

Low

154

5.4%

216

8.5%

370

6.8%

Middle low

739

25.8%

645

25.4%

1384

25.6%

Middle high

1020

35.6%

837

32.9%

1857

34.3%

High

955

33.3%

843

33.2%

1798

33.2%

Education

Less than elementary school

121

4.2%

285

11.2%

406

7.5%

Middle school

183

6.4%

258

10.2%

441

8.2%

High school

889

31.0%

831

32.7%

1720

31.8%

More than college

1675

58.4%

1167

45.9%

2842

52.5%

Shift work

Yes

532

18.5%

437

17.2%

969

17.9%

No

2336

81.5%

2104

82.8%

4440

82.1%

Stability of work

Permanent worker

2432

84.8%

1831

72.1%

4263

78.8%

Temporary worker

436

15.2%

710

27.9%

1146

21.2%

Employment type

Part-time worker

167

5.8%

638

25.1%

805

14.9%

Full-time worker

2701

94.2%

1903

74.9%

4604

85.1%

Occupation

Office worker

1427

49.8%

1232

48.5%

2659

49.2%

Service worker

291

10.1%

598

23.5%

889

16.4%

Manufacturing worker

1150

40.1%

711

28.0%

1861

34.4%

Working hours/week

<40

413

14.4%

963

37.9%

1376

25.4%

40-52

1561

54.4%

1188

46.8%

2749

50.8%

52-60

332

11.6%

188

7.4%

520

9.6%

≥60

562

19.6%

202

7.9%

764

14.1%

  1. *Unweighted count.