Table 1 Patient characteristics of group G and group GP before and after PS matching
Variable | Before matching | After matching | ||||
|---|---|---|---|---|---|---|
G (n = 4484) | GP (n = 553) | P | G(n = 520) | GP (n = 520) | P | |
Maternal age | 30 [27–33] | 30 [27–33] | 0.327 | 30.5 [28–34] | 30 [27–33] | 0.235 |
Paternal age | 32 [29–35] | 32 [29–36] | 0.001 | 32 [29–36] | 32 [29–35] | 0.991 |
Duration of infertility | 3.2 [2–5] | 4 [2–6] | 0.014 | 3.75 [2–6] | 4 [2–6] | 0.805 |
BMI (kg/m2) | 20.8 [19.2–22.4] | 20.8 [19.31–22.5] | 0.47 | 21 [19.23–22.6] | 20.8 [19.3–22.6] | 0.77 |
PCOS (%) | 427 (9.5) | 43 (7.8) | 0.183 | 44 (8.5) | 41 (7.9) | 0.734 |
Endometriosis (%) | 396 (8.8) | 58 (10.5) | 0.199 | 57 (11) | 54 (10.4) | 0.763 |
Tubal factor (%) | 2952 (65.8) | 348 (62.9) | 0.175 | 317 (61) | 329 (63.3) | 0.443 |
Male factor (%) | 827 (18.4) | 108 (19.5) | 0.535 | 110 (21.2) | 101 (19.4) | 0.488 |
Parity (%) | ||||||
0 | 3736 (83.3) | 471 (85.2) | 0.268 | 427 (82.1) | 443 (85.2) | 0.18 |
≥ 1 | 748 (16.7) | 82 (14.8) | 93 (17.9) | 77 (14.8) | ||
Gravidity (%) | ||||||
0 | 2281 (50.9) | 288 (52.1) | 0.706 | 272 (52.3) | 270 (51.9) | 0.977 |
1 | 1185 (26.4) | 137 (24.8) | 126 (24.2) | 129 (24.8) | ||
≥ 2 | 1018 (22.7) | 128 (23.1) | 122 (23.5) | 121 (23.3) | ||
Baseline FSH | 6.52 [5.61–7.6] | 6.58 [5.77–7.77] | 0.056 | 6.66 [5.69–7.68] | 6.67 [5.78–7.82] | 0.573 |
AFC | 12 [8–16] | 11 [8–15] | 0.005 | 11 [8–15] | 11 [8–15] | 0.869 |
Ovarian stimulation (%) | ||||||
Non-Agonist | 386 (8.6) | 63 (11.4) | 0.03 | 68 (13.1) | 62 (11.9) | 0.574 |
Agonist | 4098 (91.4) | 490 (88.6) | 452 (86.9) | 458 (88.1) | ||
Insemination (%) | ||||||
IVF | 3264 (72.8) | 386 (69.8) | 0.137 | 352 (67.7) | 362 (69.6) | 0.504 |
ICSI | 1220 (27.2) | 167 (30.2) | 168 (32.3) | 158 (30.4) | ||
Endometrial thickness | 8.5 [7.6–9.8] | 8.7 [7.8–9.8] | 0.031 | 8.7 [7.7–10] | 8.6 [7.8–9.8] | 0.961 |
No.of blastocyst vitrified | 3 [1–5] | 1 [0–2] | < 0.001 | 0 [0–2] | 1 [0–2] | 0.065 |
Cycles of ET (%) | ||||||
1 | 1872 (41.7) | 66 (11.9) | < 0.001 | 60 (11.5) | 66 (12.7) | 0.488 |
2 | 1800 (40.1) | 236 (42.7) | 217 (41.7) | 230 (44.2) | ||
≥ 3 | 812 (18.1) | 251 (45.4) | 243 (46.7) | 224 (43.1) | ||
Endometrial Preparation (%) | ||||||
NC | 2158 (48.1) | 234 (42.3) | < 0.001 | 212 (40.8) | 224 (43.1) | 0.726 |
HRT | 1644 (36.7) | 142 (25.7) | 148 (28.5) | 139 (26.7) | ||
HRT with GnRHa | 682 (15.2) | 177 (32) | 160 (30.8) | 157 (30.2) | ||
Day of blastocyst (%) | ||||||
Day5 | 4008 (89.4) | 271 (49) | < 0.001 | 281 (54) | 270 (51.9) | 0.494 |
Day6 | 476 (10.6) | 282 (51) | 239 (46) | 250 (48.1) | ||
FBT with TQE (%) | 2100 (46.8) | 103 (18.6) | < 0.001 | 109 (21) | 100 (19.2) | 0.486 |