Table 2.
Comparison of pregnancy complications between the two groups
| Spontaneous preterm birth group (n=50) | Full term delivery group (n=70) | χ2 | P | |
|---|---|---|---|---|
| Multiple pregnancy | 8 (16.00%) | 4 (5.71%) | 10.681 | <0.001 |
| Gestational diabetes | 9 (18.00%) | 4 (5.71%) | 5.681 | <0.001 |
| Uterine myoma | 1 (2.00%) | 1 (1.43%) | -0.233 | 0.816 |
| History of threatened abortion | 8 (16.00%) | 12 (17.14%) | 0.317 | 0.752 |
| Combined with thyroid dysfunction | 5 (10.00%) | 4 (5.71%) | -0.062 | 0.951 |
| Uterine malformation | 1 (2.00%) | 1 (1.43%) | -0.264 | 0.792 |
| Placental abnormality | 3 (6.00%) | 4 (5.71%) | -1.422 | 0.158 |
| Abnormal amniotic fluid | 4 (8.00%) | 5 (7.14%) | 1.677 | 0.097 |
| Abnormal fetal position | 6 (12.00%) | 4 (5.71%) | 6.979 | <0.001 |
| Abnormal umbilical cord | 11 (22.00%) | 8 (11.43%) | 12.182 | <0.001 |
| History of abnormal fetal heart monitoring | 11 (22.00%) | 9 (12.86%) | 14.362 | <0.001 |
| Pregnancy with other medical/surgical diseases | 1 (2.00%) | 1 (1.43%) | -0.758 | 0.451 |
| Lower genital tract infection | 6 (12.00%) | 2 (2.86%) | 10.681 | <0.001 |