Table 4.
Characteristics of late patients with and without late spontaneous miscarriages (n = 751)
| Items | Late spontaneous miscarriage | P | |
|---|---|---|---|
| No (n = 610) | Yes (n = 141) | ||
| Age (years) | 33.60 ± 4.77 | 34.74 ± 5.13 | 0.012* |
| Age of spouse (years) | 35.54 ± 5.49 | 36.89 ± 6.37 | 0.021* |
| Menarche age (years) | 13.72 ± 1.52 | 13.91 ± 1.57 | 0.170 |
| Body mass index (kg/m2) | 22.66 ± 3.32 | 22.89 ± 3.52 | 0.449 |
| Surgical intervention history | |||
| Uterine cavity procedure | 500 (82.0) | 129 (91.5) | 0.006* |
| Pelvic procedure | 225 (36.9) | 51 (36.2) | 0.874 |
| Scarred uterus | 23 (3.8) | 7 (5.0) | 0.514 |
| Etiological factors | |||
| Ovulation disorder | 144 (23.6) | 32 (22.7) | 0.818 |
| Uterine factors | 44 (7.2) | 17 (12.1) | 0.058 |
| Cervical factors | 4 (0.7) | 4 (2.8) | 0.045* |
| Fallopian tube factors | 329 (53.9) | 69 (48.9) | 0.284 |
| Pelvic cavity factors | 70 (11.5) | 12 (8.5) | 0.309 |
| Endocrine disorders | 19 (3.1) | 4 (2.8) | 0.999 |
| Immune factors | 28 (4.6) | 10 (7.1) | 0.222 |
| Chromosomal abnormalities | 5 (0.8) | 3 (2.1) | 0.176 |
| Reproductive tract infections | 5 (0.8) | 1 (0.7) | 0.999 |
| Male infertility | 80 (13.1) | 25 (17.3) | 0.177 |
| Unknown etiology | 15 (2.5) | 4 (2.8) | 0.768 |
Data were presented as mean ± SD for age, age of spouse, first marriage age, menarche age, and body mass index. Other data were expressed as n (%). *Statistical significance, P<0.05. SD: Standard deviation.