Table 3.
Pregnancy outcomes of the patients in each group.
| Items | Group A % (n) |
Group B % (n) |
Group C % (n) |
Group D % (n) |
χ2 | P value | Linear-by-linear association χ2 |
P value |
|---|---|---|---|---|---|---|---|---|
| Implantation rate | 31.4 (1907/6067) | 29.9 (1928/6456) | 26.7 (1834/6872)ab | 22.5 (1427/6344)abc | 110.069 | 0.000* | 95.731 | 0.000 |
| Clinical pregnancy rate | 45.1 (1371/3038) | 43.2 (1395/3228) | 39.6 (1362/3436)b | 33.4 (1060/3172)abc | 103.923 | 0.000* | 97.615 | 0.000 |
| Early spontaneous abortion rate | 10.2 (140/1371) | 10.2 (142/1395) | 12.1 (165/1362) | 12.7 (135/1060) | 6.457 | 0.091 | 5.558 | 0.018 |
| Fresh cycle live yield | 39.0 (1185/3038) | 37.2 (1202/3228) | 33.5 (1151/3436)ab | 28.2 (893/3172)abc | 87.870 | 0.000* | 72.448 | 0.000 |
a indicates P<0.05 compared with Group A; b indicates P<0.05 compared with Group B; c indicates P<0.05 compared with Group C. * indicates a significant difference between the two groups (P<0.008).