Table 1 Basic characteristics of study participants

Subject status

112

262

• No answer

5 (m = 1, f = 4)

22 (m = 8, f = 14)

• Dropped out

37 (m = 9, f = 28)

61 (m = 18, f = 43)

• Agreed

75 (m = 22, f = 53)

179 (m = 67, f = 112)

Age during psychiatric examination

• 20-24

-

0.6%

• 25-29

1.4%

0.6%

• 30-34

-

0.6%

• 35-39

• 40-44

-

1.2%

• 45-49

4.3%

2.9%

• 50-54

14.5%

9.4%

• 55-59

31.9%

27.1%

• 60-64

43.5%

48.8%

• 65-69

4.3%

8.8%

BMI

• ≤24.9

1.3%

34.3%

• 25.0-29.9

4.0%

47.3%

• 30.0-34.9

18.7%

14.2%

• 35.0-39.9

37.3%

3.6%

• 40.0≥

38.7%

0.6%

Marital status

p = 0.0894

• Unmarried

10.7%

15.7%

• Married

62.7%

59.6%

• Widowed

14.7%

13.5%

• Divorced

6.7%

10.7%

• Common-law marriage

5.3%

0.6%

Basic education

p = 0.2457

• Primary school

89.3%

90.4%

• Lower secondary school

6.7%

2.2%

• High school

-

2.2%

• Other

4%

3.9%

Occupational category

n = 22 (m)

n = 53 (f)

n = 66 (m)

n = 112 (f)

p = 0.901 (m)

p = 0.5930 (f)

• Technical, scientific, sociological, and artistic work

m = 0%

f = 0%

total = 0%

m = 0%

f = 4.5%

total = 2.2%

• Accounting and clerical work

m = 4.5%

f = 5.7%

total = 5.1%

m = 1.5%

f = 2.7%

total = 2.1%

• Commercial work

m = 4.5%

f = 17.0%

total = 10.8%

m = 4.5%

f = 10.7%

total = 7.6%

• Agricultural, forestry, and fishing

m = 0%

f = 7.5%

total = 3.7%

m = 3.0%

f = 7.1%

total = 5.1%

• Transport and communication work

m = 27.3%

f = 7.5%

total = 17.4%

m = 24.2%

f = 4.5%

total = 14.3%

• Industrial work

m = 50.1%

f = 17.0%

total = 33.5%

m = 48.6%

f = 21.4%

total = 35.0%

• Service work

m = 13.6%

f = 45.3%

total = 29.5%

m = 18.2%

f = 49.1%

total = 33.7%

• Total

m = 100%

f = 100%

total = 100%

m = 100%

f = 100%

total = 100%

Social classification

• According to Bruun’s social classification

p = 0.050 (m)

p = 0.936 (f)

• I = First social class

4.2%

2.3%

• II = Second social class

12.5%

17.7%

• IIII = Third social class

50.0%

57.7%

• IV = Fourth social class

33.3%

22.3%