Table 1.
Univariate analysis of risk factors related to basic characteristics of patients.
| Variables | IUP, n (%) | REP, n (%) | χ2/t | P-value |
|---|---|---|---|---|
| Total | 908 | 227 | ||
| Age | 0.000 | 1.000 | ||
| <30 | 424 (80) | 106 (20) | ||
| 30–35 | 380 (80) | 95 (20) | ||
| >35 | 104 (80) | 26 (20) | ||
| Body mass index (kg/m2) | 22.75 ± 3.06 | 22.66 ± 2.91 | 0.420 | 0.675 |
| Infertility duration (years) | 2.65 ± 2.51 | 2.52 ± 2.16 | 0.756 | 0.450 |
| Infertility factors | 4.747 | 0.093 | ||
| Tubal factor | 645 (81.23) | 149 (18.77) | ||
| Compound factors* | 199 (75.38) | 65 (24.62) | ||
| Others** | 64 (83.12) | 13 (16.88) | ||
| Gravidity | 1.780 | 0.411 | ||
| 1 | 323 (78.78) | 87 (21.22) | ||
| 2 | 304 (79.17) | 80 (20.83) | ||
| ≥3 | 281 (82.40) | 60 (17.60) | ||
| Miscarriages | 1.704 | 0.427 | ||
| 0 | 511 (80.09) | 127 (19.91) | ||
| 1 | 242 (78.06) | 68 (21.94) | ||
| ≥2 | 155 (82.89) | 32 (17.11) | ||
| Previous EP | 3.485 | 0.062 | ||
| 1 | 618 (78.53) | 169 (21.47) | ||
| ≥2 | 290 (83.33) | 58 (16.67) | ||
| Treatment of last EP | 6.883 | 0.032 | ||
| Salpingectomy | 443 (83.27) | 89 (16.73) | ||
| Conservative operation | 391 (77.43) | 114 (22.57) | ||
| Methotrexate | 74 (75.51) | 24 (24.49) |
*
Including tubal factor.
**
Including ovulation disorders, endometriosis, polycystic ovary syndrome, uterine dysplasia, uterine leiomyoma, chromosome abnormalities, and unexplained infertility.