Table 1.
Patients’ characteristics in the successful and unsuccessful delivery groups
| Variables | Successful deliveryn (%) | t-score or chi-square (df) | P value | |||
|---|---|---|---|---|---|---|
| No1141 (18.8%) | Yes4930 (81.2%) | |||||
| Mean or frequency | SD or percentage | Mean or frequency | SD or percentage | |||
| Infertility duration (Y) | 6.02 | 4.59 | 5.62 | 4.29 | 2.75 | 0.006 |
| Number of previous IVF | 0.94 | 1.27 | 0.85 | 1.15 | 2.46 | 0.014 |
| Number of retrieved oocyte | 8.36 | 4.16 | 8.56 | 4.19 | -1.08 | 0.280 |
| Number of injected oocytes | 7.16 | 3.84 | 7.47 | 3.58 | -1.99 | 0.046 |
| Total number of embryos | 4.77 | 3.00 | 4.94 | 2.87 | -1.63 | 0.101 |
| Number of transferred embryos | 2.38 | 0.97 | 2.38 | 1.02 | -0.19 | 0.848 |
| Spermogram | 3.30 | 3.02 | 3.37 | 3.70 | -0.51 | 0.612 |
| Fertilization rate | 0.68 | 0.44 | 0.70 | 0.26 | -1.28 | 0.199 |
| C1 | 0.01 | 0.88 | 0.00 | 1.03 | 0.48 | 0.626 |
| C2 | 0.00 | 0.98 | 0.00 | 1.00 | 0.05 | 0.959 |
| C3 | 0.05 | 1.35 | -0.01 | 0.90 | 1.82 | 0.068 |
| C4 | 0.03 | 1.23 | -0.01 | 0.94 | 1.08 | 0.277 |
| Age of women (Y) | 84.1(3) | <0.001 | ||||
| <35 | 882 | 16.90 | 4341 | 83.10 | ||
| 35-37 | 106 | 20.40 | 414 | 79.60 | ||
| 37-40 | 127 | 26.70 | 348 | 73.30 | ||
| >40 | 91 | 36.40 | 159 | 63.60 | ||
| Age (continuous form) | 32.25 | 5.38 | 30.90 | 4.87 | 8.78 | <0.001 |
| BMI (kg/m2) | 24.02(3) | <0.001 | ||||
| Underweight | 14 | 12.30 | 100 | 87.70 | ||
| Normal | 396 | 16.60 | 1990 | 83.40 | ||
| Overweight | 446 | 18.60 | 1958 | 81.40 | ||
| Obese | 350 | 22.40 | 1214 | 77.60 | ||
| BMI (continuous form) | 26.53 | 4.26 | 25.93 | 4.14 | 4.67 | <0.001 |
| PCOS | 6.83(1) | 0.009 | ||||
| Yes | 915 | 17.90 | 4190 | 82.10 | ||
| No | 254 | 21.20 | 945 | 78.80 | ||
| Cause of infertility | 18.25(5) | 0.003 | ||||
| Female | 297 | 19.80 | 1204 | 80.20 | ||
| Male | 529 | 17.10 | 2571 | 82.90 | ||
| Both | 155 | 21.30 | 573 | 78.70 | ||
| Unknown | 189 | 19.52 | 779 | 80.48 | ||
| History of abortion | 19.62(2) | <0.001 | ||||
| None | 908 | 17.70 | 4231 | 82.30 | ||
| One | 176 | 20.80 | 669 | 79.20 | ||
| ≥Two | 1222 | 25.20 | 362 | 74.80 | ||
| Infertility type | 5.02(1) | 0.025 | ||||
| Primary | 813 | 17.80 | 3742 | 82.20 | ||
| Secondary | 320 | 20.40 | 1249 | 79.60 | ||
| Type of cycle | 0.401 | |||||
| ET | 441 | 18.30 | 1972 | 81.70 | ||
| ICSI | 700 | 19.10 | 2958 | 80.90 | ||
C1; Number of compact and blastocysts, C2; Number of grade A and grade AB, C3; Number of early blastocysts, A compact and the day of ET, and C4; Number of AB compact, SD; Standard deviation, df; Degree of freedom, IVF; In vitro fertilisation, BMI; Body mass index, PCOS; Polycystic ovary syndrome, ET; Embryo transfer, and ICSI; Intracytoplasmic sperm injection.