Table 1 Basic characteristics of the two GnRH-a protocols before and after propensity score matching
| Â | Before propensity matching | After propensity matching | |||||
|---|---|---|---|---|---|---|---|
| Â | Long GnRH-a | Depot GnRH-a | P-value | Long GnRH-a | Depot GnRH-a | Standardized diff | P-value |
No. of cycles | 1193 | 2851 | Â | 964 | 964 | Â | Â |
Female Age (years) | 30.03 (3.77) | 29.98 (3.73) | 0.689 | 30.07 (3.79) | 29.95 (3.73) | 0.032 | 0.482 |
BMI (kg/m2) | 22.34 (2.60) | 22.67 (2.67) |  < 0.001 | 22.27 (2.59) | 22.25 (2.57) | 0.007 | 0.878 |
AFC | 14.26 (4.99) | 15.37 (5.31) |  < 0.001 | 14.17 (4.99) | 14.52 (5.07) | 0.068 | 0.135 |
AMH (ng/ml) | 4.42 (2.66) | 5.35 (3.02) |  < 0.001 | 4.36 (2.49) | 4.59 (2.42) | 0.096 | 0.035 |
Infertility duration (years) | 3.68 (2.70) | 3.49 (2.64) | 0.037 | 3.65 (2.67) | 3.63 (2.76) | 0.007 | 0.872 |
Infertility type, n (%) | Â | Â | 0.018 | Â | Â | 0.048 | 0.295 |
Primary | 582/1193 (48.78) | 1507/2851 (52.86) | Â | 464/964 (48.13) | 487/964 (50.52) | Â | Â |
Secondary | 611/1193 (51.22) | 1344/2851 (47.14) | Â | 500/964 (51.87) | 477/964 (49.48) | Â | Â |
Fertilization method, n (%) | Â | Â | 0.762 | Â | Â | 0.029 | 0.528 |
IVF | 936/1193 (78.46) | 2249/2851 (78.88) | Â | 770/964 (79.88) | 781/964 (81.02) | Â | Â |
ICSI | 257/1193 (21.54) | 602/2851 (21.12) | Â | 194/964 (20.12) | 183/964 (18.98) | Â | Â |
Infertility factors, n (%) | Â | Â | 0.002 | Â | Â | Â | 0.634 |
Pelvic and tubal factors | 802/1193 (67.23) | 1780/2851 (62.43) | Â | 663/964 (68.78) | 653/964 (67.74) | 0.022 | Â |
Ovulation disorder | 88/1193 (7.38) | 288/2851 (10.10) | Â | 73/964 (7.57) | 69/964 (7.16) | 0.016 | Â |
Endometriosis | 29/1193 (2.43) | 113/2851 (3.96) | Â | 22/964 (2.28) | 33/964 (3.42) | 0.069 | Â |
Male factor | 209/1193 (17.52) | 487/2851 (17.08) | Â | 161/964 (16.70) | 160/964 (16.60) | 0.003 | Â |
Unexplained | 65/1193 (5.44) | 183//2851 (6.43) | Â | 45/964 (4.67) | 49/964 (5.08) | 0.019 | Â |