Items

Overall frequency

Number of cases

x ¯ ± s

F

P

Gender

1.091

0.299

Male

43

168.21 ± 18.609

Female

65

163.91 ± 22.358

Age

1.944

0.148

≤35

47

165.47 ± 20.443

36 - 45

49

163.14 ± 19.991

46 or above

12

176.33 ± 25.119

Only child or not

2.606

0.109

Yes

20

172.40 ± 21.279

No

88

164.08 ± 20.702

Monthly family income

2.817

0.043*

RMB 0 - 3000

18

156.61 ± 21.241

RMB 3000 - 5000

32

162.94 ± 25.101

RMB 5000 - 10,000

36

167.03 ± 19.026

RMB > 10,000

22

174.59 ± 13.114

Educational background

4.222

0.007**

Primary school and below

7

145.86 ± 25.478

Junior high school

46

168.02 ± 20.512

Senior high school

29

166.59 ± 19.807

Undergraduate and above

26

174.46 ± 17.998

Place of residence

3.635

0.030*

Cities

13

178.15 ± 22.003

Towns

57

166.16 ± 20.321

Countryside

38

160.53 ± 20.158

Medical payment methods

3.948

0.010*