Table 1.
Baseline demographics by PNV utilization in healthy women delivering at term with 1st or 2nd trimester dating
| ≤ 10 PNV N=5093 | > 10 PNV N=2163 | p | |
|---|---|---|---|
| Maternal age, years (median, IQR) | 24 (20-29) | 24 (21-29) | 0.005 |
| Advance maternal age ≥ 35 yr | 351 (6.89) | 176 (8.14) | 0.062 |
| Age < 18yrs | 323 (6.34) | 173 (8.00) | 0.011 |
| Dating | |||
| 1st trimester ultrasound | 1103 (21.66) | 647 (29.91) | <0.001 |
| 2nd trimester ultrasound | 3,990 (78.34) | 1516 (70.09) | |
| Early Term Delivery 37-38 wks | 1633 (32.06) | 559 (25.84) | <0.001 |
| Gestational age at delivery in weeks -Mean (SD) | 39.02 (1.17) | 39.26 (1.18) | <0.001 |
| African-American race | 3444 (67.62) | 1349 (62.37) | <0.001 |
| Medicaid or Uninsured | 4164 (81.76) | 1660 (76.75) | <0.001 |
| Married | 641 (12.59) | 218 (10.08) | 0.002 |
| Obese (BMI ≥ 30kg/m2) | 2704 (54.24) | 1293 (60.99) | <0.001 |
| Nulliparous | 906 (17.79) | 310 (14.33) | <0.001 |
| Prior cesarean | 523 (10.27) | 212 (9.80) | 0.546 |
| Prior Preterm Birth | 453 (8.9) | 172 (7.96) | 0.193 |
| Labor type | |||
| Spontaneous | 1761 (34.58) | 600 (29.08) | |
| Augmented | 1587 (31.16) | 639 (30.97) | <0.001 |
| Induced | 1577 (30.96) | 824 (39.94) | |
| Unknown | 168 (3.30) | 100 (4.62) | |
| Regional anesthesia | 1914 (88.04) | 556 (91.00) | 0.041 |
| Alcohol | 55 (1.08) | 22 (1.02) | 0.811 |
| Tobacco | 814 (15.98) | 259 (11.97) | <0.001 |