Table 4.
Quartiles of estradiol
| Quartile | Q1 | Q2 | Q3 | Q4 | p |
|---|---|---|---|---|---|
| Estradiol (pg/ml) | < 188.2 | 188.2–263.0 | 263.1–364.5 | > 364.6 | |
| n | 230 | 230 | 230 | 230 | |
| Embryo stage at freezing | |||||
| 48 h | 162 (70.4) | 154 (67.3) | 142 (61.7) | 151 (65.7) | 0.26 |
| 72 h | 68 (29.6) | 75 (32.7) | 88 (38.3) | 79 (34.3) | |
| At least one good quality embryo | 149 (65.6) | 150 (65.5) | 162 (71.1) | 146 (63.8) | 0.39 |
| Number of embryos transferred | 2.0 ± 0.7 (1.9–2.0) | 2.0 ± 0.7 (1.9–2.1) | 2.0 ± 0.7 (1.9–2.1) | 2.0 ± 0.6 (2.0–2.1) | 0.50 |
| Implantation rate | 7.5 (4.3–10.6) | 10.1 (6.9–13.3) | 11.6 (8.0–15.3) | 14.5 (10.7–18.3) | 0.05* |
| Pregnancy | 50 (21.7%) | 68 (29.6%) | 76 (33.0%) | 79 (34.3%) | 0.02# |
| Biochemical pregnancy | 21 (9.1%) | 14 (6.1%) | 18 (7.8%) | 21 (9.1%) | 0.60 |
| Clinical miscarriage | 7 (3.0%) | 19 (8.3%) | 25 (10.9%) | 15 (6.5%) | 0.01^ |
| Live birth | 19 (8.3%) | 30 (13.0%) | 33 (14.3%) | 42 (18.3%) | 0.02& |
Continuous data is mean ± sd [median, range]; binary data is N (%)
*Q1 as compared the Q4
#Q1 as compared to the other quartiles
^Q1 as compared to the second and third quartiles
&Q1 as compared to the third and fourth quartiles