Table 1. Maternal and Neonatal Characteristics.
| Characteristics | Infants with LOM, No./total No. (%) (n = 167) | Infants with LOS and no LOM, No./total No. (%) (n = 4564) | Infants with no LOS or LOM, No./total No. (%) (n = 8641) | P valuea |
|---|---|---|---|---|
| Maternal | ||||
| Maternal age, median (IQR), yb | 26.0 (22.0-31.0) | 27.0 (22.0-32.0) | 27.0 (23.0-32.0) | .002 |
| Maternal education | ||||
| <High school | 34/124 (27) | 851/3437 (25) | 1468/6483 (23) | .002 |
| High school degree | 37/124 (30) | 1087/3437 (32) | 1914/6483 (30) | |
| Partial college, trade, technical | 34/124 (27) | 790/3437 (23) | 1608/6483 (25) | |
| ≥College degree | 19/124 (15) | 709/3437 (21) | 1493/6483 (23) | |
| Private medical insurance | 51/154 (33) | 1646/4214 (39) | 3384/7812 (43) | <.001 |
| Race | ||||
| Black | 63/166 (38) | 1908/4485 (43) | 3524/8465 (42) | .17 |
| White | 95/166 (57) | 2352/4485 (52) | 4439/8465 (52) | |
| Otherc | 8/166 (5) | 225/4485 (5) | 502/8465 (6) | |
| Hispanic | 28/161 (17) | 816/4441 (18) | 1325/8397 (16) | <.001 |
| Maternal diabetes | 8/166 (5) | 211/4549 (5) | 395/8613 (5) | .98 |
| Maternal hypertension | 22/166 (13) | 950/4553 (21) | 1891/8609 (22) | .01 |
| Histological chorioamnionitisd | 61/115 (53) | 1511/3112 (49) | 3322/6788 (49) | .63 |
| Antenatal steroids | 145/165 (88) | 3856/4545 (85) | 7461/8608 (87) | .01 |
| Antibiotics within 72 h of deliveryd | 89/94 (95) | 2215/2416 (92) | 4980/5440 (92) | .55 |
| Multiple gestation | 40/167 (24) | 1106/4564 (24) | 2055/8641 (24) | .85 |
| Cesarean section | 90/167 (54) | 2723/4561 (60) | 5482/8629 (64) | <.001 |
| Neonatal | ||||
| Outborn | 12/167 (7) | 399/4564 (9) | 588/8641 (7) | <.001 |
| Sex | ||||
| Female | 86/167 (51) | 2063/4561 (45) | 4365/8640 (50) | <.001 |
| Male | 81/167 (49) | 2498/4561 (55) | 4285/8640 (50) | |
| Gestational age, median (IQR), wke | 25.0 (24.1-25.9) | 25.0 (24.1-25.9) | 25.6 (24.6-26.3) | <.001 |
| Birth weight, median (IQR), ge | 699 (605-838) | 700 (600-810) | 750 (636-870) | <.001 |
| Small for gestational age | 9/167 (5) | 330/4561 (7) | 566/8640 (7) | .26 |
Abbreviations: LOM, late-onset meningitis; LOS, late-onset sepsis.
P values were calculated from χ2 tests for categorical variables and Kruskal-Wallis tests for continuous variables.
Data on maternal age were available for 167 participants in the LOM cohort, 4562 in the LOS without LOM cohort, and 8636 in the no LOS or LOM cohort.
Races included in other were American Indian or Alaskan Native (82 participants); Asian, Native Hawaiian, or other Pacific Islander (483 participants); more than 1 race (107 participants); and unknown race (63 participants).
Available after 2006.
Data on gestational age and birth weight were available for 167 participants in the LOM cohort, 4564 participants in the LOS without LOM cohort, and 8641 participants in the no LOS or LOM cohort.