Table 1 Demographic characteristics of the participants

Age, years

0

0

≤ 69

213 (34.2%)

327 (55.1%)

70 − 79

180 (28.9%)

177 (29.8%)

80–89

181 (29.1%)

77 (13.0%)

90–99

49 (7.9%)

12 (2.0%)

Education

5

7

None

372 (60.2%)

76 (13.0%)

Elementary

199 (32.2%)

313 (53.4%)

Secondary or over

47 (7.6%)

197 (33.6%)

Marital status

16

9

Married

245 (40.4%)

391 (67.0%)

Single

3 (0.5)

30 (5.1)

Widowed

310 (51.1)

79 (13.5)

Divorced

48 (7.9)

83 (14.2)

Separated

1 (0.2)

1 (0.2)

Medical expenditure

monthly medical spending

≥ ¥2000: 63 (10.3%);

¥1000–1999: 87 (14.3%);

<¥1000: 459 (75.4%)

14

≥ ¥2000: 41 (7.1%);

¥1000–1999: 81(13.9%);

<¥1000: 459 (79.0%)

12

maximum annual medical spending

≥ 4000: 92 (15.3%);

¥3000–3999: 36 (6.0%);

¥2000–2999: 78 (13.0%);

¥1000–1999: 101 (16.8%);

<¥1000: 295 ( 49.0%)

21

≥ 4000: 83 (14.3%);

¥3000–3999: 34 (5.8%);

¥2000–2999: 89 (15.3%);

¥1000–1999: 79 (13.6%);

<¥1000: 295 (50.9%)

13