2

77 (32.08)

87.17 ± 19.28

3

20 (8.33)

78.35 ± 20.07

4

6 (2.50)

74.50 ± 13.10

5

1 (0.42)

68.00

Day after operation

≤3

36 (15.00)

90.69 ± 20.53

4.7361)

0.010

4 - 7

161 (67.08)

93.50 ± 17.40

≥8

43 (17.92)

83.91 ± 19.21

Admission times

1

197 (82.08)

92.03 ± 18.34

2.7541)

0.066

2

34 (14.17)

91.24 ± 19.74

>2

9 (3.75)

77.33 ± 11.97

Chronic disease

No

209 (87.08)

92.24 ± 18.16

2.3601)

0.097

1

24 (10.00)

87.21 ± 22.13

≥2

7 (2.92)

79.29 ± 7.39

Monthly income (RMB)

≤2000

50 (20.83)

88.56 ± 19.58

6.5121)

<0.001

2000 - 4000

78 (32.50)

85.14 ± 19.47

4000 - 6000

67 (27.92)

94.72 ± 17.34

6000 - 9000

28 (11.67)

97.86 ± 11.30

≥9000

17 (7.08)

104.24 ± 12.18

Primary caregiver

Children/Husband

186 (77.50)

91.33 ± 18.75

2.0121)

0.136

Self

32 (13.33)

87.31 ± 18.88

Others

22 (9.17)

97.55 ± 14.40