Table 2.
Pregnancy outcomes.
| Group 1 (≤1 year) | Group 2 (1 < group < 6 years) | Group 3 (≥6 years) | P value | |
|---|---|---|---|---|
| BPR, n (%) | 27,640 (68.31)a | 3862 (60.94)b | 129 (62.02)a,b | <.001 |
| CPR, n (%) | 24,256 (59.95)a | 3333 (52.60)b | 116 (55.77)a,b | <.001 |
| LBR, n (%) | 19,943 (49.29)a | 2665 (42.05)b | 91 (43.75)a,b | <.001 |
| EPR, n (%) | 394 (1.62)a | 56 (1.68)a | 3 (2.59)a | .70 |
| MPR, n (%) | 7747 (31.94)a | 885 (26.55)a | 37 (31.90)a | <.001 |
| EMR, n (%) | 3188 (13.14)a | 490 (14.70)b | 19 (16.38)a,b | .03 |
| LMR, n (%) | 516 (2.13)a | 101 (3.03)b | 2 (1.72)a,b | .004 |
The Chi-square test is used for between group comparison, where “a” and “b” denote the outcomes of pair-by-pair comparisons after adjusting the P value. The abbreviations used are as follows: BPR = Biochemical pregnancy rate, CPR = Clinical pregnancy rate, EMR = Early miscarriage rates, EPR = Ectopic pregnancy rate, LBR = Live birth rate, LMR = Late miscarriage rate, MPR = Multiple pregnancy rate.