Table 1 Basic characteristics (Total N = 14)

Age, Mean ± SD (years)

46.3 ± 5.33

 40–44

5 (35.7)

 45–49

6 (42.9)

 50–54

1 (7.1)

 55–59

2 (14.3)

Body mass index, Mean ± SD (kg/m²)

24.9 ± 3.88

 < 25

6 (42.9)

 ≥ 25

6 (42.9)

 Missing

2 (14.3)

Education

 ≤Middle school

2 (14.3)

 High school

6 (42.9)

 ≥College

6 (42.9)

Income (₩10,000)

 < 200

1 (7.1)

 200–400

4 (28.6)

 ≥ 400

9 (64.3)

Marital status

 Living with spouse

12 (85.7)

 Living alone

2 (14.3)

Current occupation

 Office

8 (57.1)

 Unemployed/House wives

6 (42.9)

Smoking

 Never

10 (71.4)

 Former

2 (14.3)

 Current

1 (7.1)

 Unknown

1 (7.1)

Drinking alcohol

 Never

1 (7.1)

 Former

4 (28.6)

 Current

7 (50.0)

 Unknown

2 (14.3)

Disease history

 No

12 (85.7)

 Yes

2 (14.3)

Physical activity questionnaire, Mean ± SD (minutes/week)

345.0 ± 298.01

 < 150

2 (14.3)

 150–300

6 (42.9)

 ≥ 300

6 (42.9)