Characteristic | No. of participants | OR (95%CI) a | P-value‡ | P for interaction |
---|---|---|---|---|
Endometrial thickness on the day of progesterone administration (mm) | 0.952 | |||
Tertile 1 (< 9.00) | 531 | 1.11 (0.74, 1.67) | 0.609 | |
Tertile 2 (9.00–10.30) | 537 | 1.22 (0.85, 1.75) | 0.292 | |
Tertile 3 (> 10.30) | 570 | 1.16 (0.82, 1.64) | 0.404 | |
Triple-line endometrial pattern | ||||
A | 178 | 1.02 (0.56, 1.86) | 0.956 | 0.169 |
B | 1344 | 1.19 (0.94, 1.50) | 0.156 | |
C | 116 | 2.34 (1.04, 5.29) | 0.041 | |
Number of transferred embryos | ||||
1 | 431 | 0.94 (0.62, 1.41) | 0.760 | 0.227 |
2 | 1192 | 1.34 (1.05, 1.73) | 0.021 | |
3 | 15 | 1.25 (0.16, 9.92) | 0.833 | |
Female age at embryo transfer | ||||
Tertile 1 (< 27) | 428 | 1.15 (0.74, 1.79) | 0.529 | 0.311 |
Tertile 2 (27–29) | 591 | 1.00 (0.71, 1.42) | 0.978 | |
Tertile 3 (> 29) | 619 | 1.51 (1.08, 2.13) | 0.017 | |
Fertilization type | ||||
IVF | 1325 | 1.17 (0.92, 1.48) | 0.200 | 0.257 |
ICSI | 253 | 1.25 (0.74, 2.12) | 0.410 | |
IVF + ICSI | 60 | 3.24 (1.04, 10.10) | 0.043 | |
Protocol in the fresh cycle | ||||
Agonist | 1489 | 1.22 (0.98, 1.53) | 0.074 | 0.849 |
Antagonist | 145 | 1.02 (0.49, 2.11) | 0.959 | |
Other | 4 |