Table 1 Demographic characteristics of the study population

N

616

5.48

2,153

19.16

8,466

75.35

11,235

 Female

384

62.34

1,394

64.75

4,588

54.19

6,366

56.66

 Married

164

26.62

1,150

53.41

5,554

65.60

6,868

61.13

  ∈no diploma

110

17.86

493

22.90

245

2.89

848

7.55

  ∈below high school diploma

328

53.25

1,221

56.71

2,021

23.87

3,570

31.78

  ∈high school diploma

129

20.94

303

14.07

2,665

31.48

3,097

27.57

  ∈above high school diploma

49

7.95

136

6.32

3,535

41.76

3,720

33.11

  ∈ permanent employee

2

0.32

15

0.70

2,319

27.39

2,336

20.79

  ∈temporary employee

52

8.44

309

14.35

1,891

22.34

2,252

20.04

  ∈ employer, self-employed, unpaid family worker

11

1.79

302

14.03

1,161

13.71

1,474

13.12

  ∈ unemployed, economically inactive

551

89.54

1,527

70.92

3,095

36.56

5,173

46.04

 Reporting bad health

358

58.12

1,025

47.61

1,227

14.49

2,610

23.23

 Chronic disease

527

85.55

1,820

84.53

3,971

46.91

6,318

56.23

 Disabled

115

18.67

170

7.90

265

3.13

550

4.90

 Private insurance subscription

123

19.97

468

21.74

6,499

76.77

7,090

63.11

 Depression

276

44.81

649

30.14

782

9.24

1,707

15.19

 Age

66.21 (mean)

16.60 (SD)

72.27 (mean)

13.02 (SD)

50.27 (mean)

17.65 (SD)

55.30 (mean)

19.02 (SD)

 Monthly income (one million won)

0.92 (mean)

0.31 (SD)

0.81 (mean)

0.53 (SD)

3.13 (mean)

2.11 (SD)

2.56 (mean)

2.09 (SD)