Table 1.
Characteristics of the Study Subjects Meeting the Inclusion Criteria
| Characteristic | Cases With Concordant UA PIs (n = 128) | Cases with Discordant UA PIs (n = 81) | P Value |
|---|---|---|---|
|
| |||
| Maternal age at delivery (years) | 34 [23–43] | 34 [18–43] | .17 |
| Maternal prepregnancy body mass index (kg/m2) | 25.5 [17.5–43.6] | 25.1 [16.5–40.0] | .60 |
| Race (%) | .88 | ||
| Asian | 22 (29/128) | 27 (22/81) | |
| Black | 12 (15/128) | 12 (10/81) | |
| White | 62 (79/128) | 57 (46/81) | |
| Other | 4 (5/128) | 4 (3/81) | |
| Gestational age at delivery (weeks) | 38 [30–41] | 38 [32–41] | .20 |
| Preeclampsia (%) | 4 (5/128) | 9 (7/81) | .22 |
| Cesarean delivery (%) | 39 (50/128) | 40 (32/81) | 1.00 |
| Birth weight (g) | 3136 [1390–4630] | 3226 [1615–4490] | .29 |
| Infant female sex (%) | 53 (68/128) | 43 (35/81) | .20 |
| Small for gestational age (%) | 9 (12/128) | 11 (9/81) | .75 |
| 1-min Apgar score < 7 | 9 (11/128) | 10 (8/81) | .81 |
| 5-min Apgar score < 7 | 1 (1/128) | 1 (1/81) | 1.00 |
| NICU admission | 10 (13/128) | 5 (4/81) | .21 |
| Cord abnormalitya,b | 26 (28/107) | 26 (15/58) | .98 |
| Placental pathologyb,c | 11 (12/107) | 10 (6/58) | .91 |
Data are mean [range] or % (n/N).
a
Velamentous or marginal insertion (<3 cm from the placental disc margin).
b
Forty four placentas did not have an umbilical cord insertion or placental pathology assessed.
c
Defined as maternal vascular malperfusion or fetal vascular malperfusion.