Table 2.
Comparison of maternal characteristics between GA at delivery <26 weeks and ≥26 weeks.
| GA at delivery <26 weeks (n = 17) | GA at delivery ≥26 weeks (n = 18) | p-value | |
|---|---|---|---|
| Maternal age | 33 [29–40] | 36 [29–42] | 0.02* |
| BMI | 25.3 [19.5–38.0] | 24.9 [22.5–28.6] | 0.72 |
| Parity | |||
| Primiparous | 11/17 (64.7%) | 11/18 (61.1%) | 1 |
| Multiparous | 6/17 (35.3%) | 7/18 (38.9%) | |
| History of PTB | 12/17 (70.6%) | 15/18 (83.3%) | 0.44 |
| History of conization/LEEP | 0/17 (0%) | 1/18 (94.4%) | 1 |
| Mullerian anomaly | 2/17 (11.8%) | 0/18 (0%) | 0.23 |
| In vitro fertilization | 3/17 (17.7%) | 5/18 (27.8%) | 0.69 |
| Prior cerclage type | |||
| History-indicated cerclage | 7/17 (41.2%) | 13/18 (72.2%) | 0.15 |
| Ultrasound-indicated cerclage | 4/17 (23.5%) | 1/18 (5.6%) | |
| Physical examination-indicated cerclage | 6/17 (35.3%) | 4/18 (22.2%) | |
| GA at prior cerclage (weeks) | 15 [13–20+1] | 13+6 [12+5–18] | 0.06 |
| GA at repeat cerclage (weeks) | 21 [16+2–23+4] | 21+6 [16+2–23+6] | 0.24 |
| Latency between RC and prior cerclage | 30 [8–66] | 49 [5–76] | 0.008* |
| Size of bulging membranes (cm) | 2.7 [1.0–6.0] | 2.1 [1.0–5.0] | 0.12 |
| Culture positive | 10/17 (58.82%) | 10/18 (55.56%) | 1 |
| NLR before RC | 5.2 [2.8–12.3] | 4.9 [3.0–18.0] | 0.55 |
| CRP before RC | 5.8 [0.9–42.3] | 6.0 [3.0–18.0] | 0.44 |
| NLR after RC | 7.0 [2.9–12.7] | 6.5 [1.9–69.5] | 0.87 |
| CRP after RC | 11.2 [1.8–54.9] | 19.2 [5.1–66.4] | 0.21 |
| Use of amniocentesis | 6/17 (35.3%) | 12/18 (66.7%) | 0.094 |
| Number of suture knots | 13/17 (76.5%) | 8/18 (44.4%) | 0.11 |
| Postoperative CL (mm) | 13 [8–20] | 22 [5–41] | < 0.001* |
Data are expressed as medians (ranges), and numbers (percentages).
*p < 0.05, which means statistical difference.
BMI, body mass index; GA, gestational age; RC, repeat cerclage; NLR, neutrophil lymphocyte ratio; CL, cervical length; PTB, preterm birth; CRP, c-reactive protein; LEEP, loop electrosurgical excision procedure.