组别

N

无效

有效

显效

总有效

对照组

60

12 (20.00%)

38 (63.33%)

10 (16.67%)

22 (73.33%)

观察组

60

3 (5.00%)

40 (66.67%)

17 (28.33%)

57 (95.00%)

Z

-

-

-

−2.444

P

-

-

-

0.015