Table 1.
M&M participants demographics and characteristics
| Term (n = 432) | sPTB (n = 107) | p-value** | |
|---|---|---|---|
| Race | 0.99 | ||
| African American | 322 (74.5) | 80 (74.8) | |
| White | 92 (21.3) | 23 (21.5) | |
| Other | 18 (4.2) | 4 (3.7) | |
| Maternal age in years, mean (SD) | 28 (6) | 29 (6) | 0.33 |
| Marital status | 0.24 | ||
| Single | 309 (71.5) | 70 (65.4) | |
| Married | 123 (28.5) | 37 (34.6) | |
| Insurance | 0.2 | ||
| Private | 212 (49.1) | 45 (42.1) | |
| Medicaid | 220 (50.9) | 62 (57.9) | |
| Nulliparous | 188 (43.5) | 38 (35.5) | 0.15 |
| Gestational diabetes | 17 (3.9) | 8 (7.5) | 0.12 |
| Pre-gestational diabetes | 9 (2.1) | 3 (2.8) | 0.71 |
| Chronic hypertension | 21 (4.9) | 8 (7.5) | 0.34 |
| History of sPTB/2nd trimester loss | 49 (11.3) | 43 (40.2) | <0.001 |
| Cervical length screening performed at Level II Ultrasounda | 368 (85.2) | 71 (66.4) | <0.001 |
| Cervical length at Level II (mm), median (IQR) | 34 (31–38) | 29 (20–33) | <0.001 |
| Cerclage | 8 (1.8) | 15 (14.0) | <0.001 |
| Vaginal bleeding—first trimester | 62 (14.4) | 16 (14.9) | 0.88 |
| Vaginal bleeding—second trimester | 25 (5.8) | 23 (21.9) | <0.001 |
| Vaginal bleeding—third trimester | 48 (11.1) | 18 (19.3) | 0.04 |
| Gestational age at delivery in weeks, median (IQR) | 39 (39–40) | 33 (25–35) | <0.001 |
**p-values estimated using t-test
awomen with prior PTB are screened prior to level II ultrasound (16–22 weeks) and not all women undergo screening again during the specific level II ultrasound (19–21 weeks) which is performed to assess fetal anatomical structures