组别

n

术前

术后1个月

术后3个月

观察组

56

60.23 ± 2.51

75.13 ± 4.06^ab

93.27 ± 6.36^ab

对照组

56

60.68 ± 2.47

68.25 ± 3.97^a

82.19 ± 7.38^a

t

0.819

5.782

`0.125

P

0.264

0.013

0.003