组别 | 1月(%) | 3月(%) | 6月(%) | 12月(%) |
对照组(n = 29) | 31.0% (9) | 44.8% (13) | 55.2% (16) | 62.1% (18) |
观察组(n = 28) | 57.1% (16) | 71.4% (20) | 82.1% (23) | 85.7% (24) |
卡方值 | 3.944 | 4.135 | 4.796 | 4.108 |
P value | 0.047 | 0.042 | 0.029 | 0.043 |