Table 2 General characteristics of the patients in two groups

Age (years)

51.47 ± 6.10

49.98 ± 5.68

Sex

 Male

33

35

 Female

16

14

Marital status

 Married

46

45

 Divorced

1

1

 Widowed

2

3

Educational level

 Junior middle school or lower

17

15

 Senior middle school or technical secondary school

21

19

 College or higher

11

15

Number of children

 0

1

0

 1–2

37

38

 ≥ 3

11

11

Number of stents implanted

 1

29

32

 2

20

16

 ≥ 3

0

1

Family income per person (yuan)

 ≤ 3000

16

15

 ≤ 5000

26

28

 > 5000

7

6

Payment

 Self-paying

4

3

 Medical insurance for urban employees

24

26

 The new rural cooperative medical care system

21

20