Table 1:
Patient Demographics
| Patient Characteristics | No Cerclage n=39 | Cerclage n=96 | P |
|---|---|---|---|
| Age (years), median (range) | 32 (17 to 45) | 35 (24–51) | 0.003 |
| Gravidity, median (range) | 2.8 (1 to 11) | 2.5 (1 to 11) | 0.373 |
| Nulliparous | 19 (50%) | 55 (57.3%) | 0.444 |
| Race | <0.001 (fe) | ||
| White | 11 (28.2%) | 59 (61.5%) | |
| Black | 10 (25.6%) | 4 (4.2%) | |
| Hispanic | 8 (20.5%) | 6 (6.25%) | |
| Asian | 7 (17.9%) | 12 (12.5%) | |
| Other | 1 (2.6%) | 15 (15.6%) | |
| Smoking | 0 (0%) | 3 (3.1%) | 0.560 (fe) |
| BMI (kg/m2) | 27 (19–44) | 24 (18–39) | 0.008 |
| Obese | 9 (25.7%) | 9 (9.6%) | 0.019 |
| Insurance | <0.001 (fe) | ||
| Public | 19 (50%) | 1 (1.1%) | |
| Private | 17 (44.7%) | 94 (98.9%) | |
| Unspecified | 2 (5.3%) | 0 (0%) | |
| Medical Risk Factors* | 0.125 | ||
| No | 31 (83.8%) | 68 (70.8%) | |
| Yes | 6 (16.2%) | 28 (29.2%) | |
| Hx of PTB | 9 (23.7%) | 26 (27.1%) | 0.686 |
| Hx of cervical insufficiency | 2 (5.3%) | 18 (18.9%) | 0.059 (fe) |
| IVF | 9/38 (23.7%) | 73/95 (76.8%) | <0.001 |
| Chorionicity | 0.003 | ||
| Dichorionic-diamniotic | 23 (60.5%) | 81 (84.4%) | |
| Monochorionic-diamniotic | 15 (39.5%) | 15 (15.6%) | |
| Multifetal reduction | 0/36 (0%) | 17/87 (19.5%) | 0.001 (fe) |
| TTTS | 4/15 (26.7%) | 4/15 (26.7%) | 1.0 (fe) |
| Laser | 2/4 (50.0%) | 3/4 (75.0%) | 1.0 (fe) |
| Progesterone use | 6 (15.4%) | 20 (20.8%) | 0.467 |
| Tocolytic use | 25/39 (64.1%) | 69/96 (71.9%) | 0.373 |
| Betamethasone given | 32/39 (82.1%) | 76/96 (79.2%) | 0.704 |
Data presented is n (%) or median (range) unless otherwise indicated. P-values calculated with chi-squared, Fishers exact (fe) test or Mann-Whitney as appropriate. Significant values (p<0.05) are indicated in bold.
*
Other medical risk factors for PTB, including chronic hypertension, obesity, fibroids.
fe, fishers exact; BMI, body mass index; RF, risk factors; PTB, preterm birth; Hx, history; IVF, in vitro fertilization; TTTS, twin twin transfusion syndrome