Table 1 Characteristics of the study participants

Age, years

75.3

(5.3)

74.6

(5.2)

74.9

(5.2)

Educational attainment, %

 < 13 years

8

(40.0)

10

(50.0)

18

(45.0)

 ≥ 13 years

12

(60.0)

9

(45.0)

21

(52.5)

 Missing

0

(0)

1

(5.0)

1

(2.5)

Working status, %

 Working with income

6

(30.0)

5

(25.0)

11

(27.5)

 Not working

14

(70.0)

14

(70.0)

28

(70.0)

 Missing

0

(0)

1

(5.0)

1

(2.5)

Living arrangement, %

 With others

19

(95.0)

16

(80.0)

35

(87.5)

 Alone

1

(5.0)

3

(15.0)

4

(10.0)

 Missing

0

(0)

1

(5.0)

1

(2.5)

Body mass index, kg/m²

23.1

(1.7)

21.2

(2.1)

22.2

(2.1)

Systolic blood pressure, mmHg

138.4

(13.3)

131.8

(18.7)

135.1

(16.3)

Diastolic pressure, mmHg

75.7

(10.5)

71.4

(9.5)

73.5

(10.1)

Mini-Cog score, score

4.0

(1.3)

4.5

(0.6)

4.2

(1.0)

Mini-Cog judgment, %

 Normal

18

(90.0)

20

(100)

38

(95.0)

 Abnormal

2

(10.0)

0

(0)

2

(5.0)