Table 3.
Comparison of the characteristics between two groups.
| Characteristic | Study group (n = 26) | Control group (n = 52) | P value |
|---|---|---|---|
| Age (year) | 31.0 ± 5.5 | 31.9 ± 4.4 | 0.094 |
| Gestational age at termination of pregnancy (week) | 8.4 ± 2.3 | 8.4 ± 1.8 | 0.159 |
| Abortion type | 0.722 | ||
| Fetal demise | 18 (69.2) | 38 (73.1) | |
| Induced abortion | 8 (30.8) | 14 (26.9) | |
| Gravidity | 1 [0–3] | 2 [0–8] | 0.025 |
| Parity | 0 [0–2] | 1 [0–6] | 0.1 |
| Mode of conception | 0.685 | ||
| Spontaneous | 23 (88.5) | 48 (92.3) | |
| IVF-ET | 3 (11.5) | 4 (7.7) | |
| Initial treatment | 0.399 | ||
| Drug intervention | 13 (50) | 26 (50) | |
| Surgical intervention | 10 (38.5) | 24 (46.2) | |
| None | 3 (11.5) | 2 (3.8) | |
| Vaginal hemorrhage | |||
| ≤14 days | 20 (76.9) | 40 (76.9) | 1.000 |
| >14 days | 6 (23.1) | 12 (23.1) | |
| Serum β-hCG (mIU/ml) | 3.67 [0–799.1] | 21.08 [0–901.2] | 0.004 |
| Ultrasound | |||
| Abundant blood flow | 2 (7.7) | 24 (46.2) | 0.001 |
| Intrauterine volume (cm3) | 1.93 ± 2.55 | 5.42 ± 4.94 | 0.001 |
| Interval between pregnancy termination and subsequent surgical intervention (day) | 51.5 ± 31.7 | 38.2 ± 14.9 | <0.001 |
| Prior endometrial polypectomy | 1 (3.8) | 1 (3.8) | 1 |
| Polycystic ovary syndrome | 3 (11.5) | 4 (7.7) | 0.575 |
Data are presented as mean ± standard deviation, median [range], or number (%). Missed abortions or spontaneous abortions are grouped as fetal demise.