Table 1. . Demographic, maternal and perinatal data and characteristics of Group A (control) and Group B (study).
| Patient characteristics and outcomes | Group | p-value | |
|---|---|---|---|
| A n (%) | B n (%) | ||
| Age, mean (SD) | 28.8 (3.7) | 28.5 (5.0) | 0.721† |
| Gestational week (samples were taken), mean (SD) | 30 (4.0) | 30 (3.8) | 0.946† |
| Parity | |||
| 1 | 39 (59.1) | 44 (66.7) | 0.368¶ |
| 2–3 | 27 (40.9) | 22 (33.3) | |
| Smoking | |||
| No | 61 (92.4) | 58 (87.9) | 0.381¶ |
| Yes | 5 (7.6) | 8 (12.1) | |
| Positive gynaecological history | |||
| No | 56 (84.8) | 61 (92.4) | 0.170¶ |
| Yes | 10 (15.2) | 5 (7.6) | |
| Positive family history | |||
| No | 63 (95.5) | 66 (100.0) | 0.244§ |
| Yes | 3 (4.5) | 0 (0.0) | |
| Bleeding during pregnancy | |||
| No | 66 (100.0) | 61 (92.4) | 0.058§ |
| Yes | 0 (0.0) | 5 (7.6) | |
| Abdominal or lumbar pain or sensation of suprapubic pressure | |||
| No | 56 (84.8) | 35 (53.0) | <0.001¶ |
| Yes | 10 (15.2) | 31 (47.0) | |
| Chorioamnionitis | |||
| No | 66 (100.0) | 66 (100.0) | – |
| Yes | 0 (0.0) | 0 (0.0) | |
| Cervical length, mean (SD) | 33.1 (4.1) | 31.1 (4.9) | 0.009† |
| Gestational age at delivery, median (IQR) | 39 (38 - 40) | 30 (26–34) | <0.001‡ |
| Birth weight (gr), mean (SD) | 3515 (258.9) | 1810 (651.3) | <0.001† |
| Type of delivery | |||
| Vaginal delivery | 47 (71.2) | 31 (47.0) | 0.005¶ |
| Cesarian section | 19 (28.8) | 35 (53.0) | |
| Neonatal Intensive Care Unit | |||
| No | 63 (95.5) | 13 (19.7) | <0.001¶ |
| Yes | 3 (4.5) | 53 (80.3) | |
†Student's t-test
‡Mann–Whitney test
¶Pearson's χ2 test
§Fisher's exact test
IQR: Interquartile range; SD: Standard deviation.