Table 1. Sociodemographic and Baseline Clinical Characteristics of Mothers and Offspring.
| Characteristic | Maternal SARS-CoV-2 status during pregnancya | P valueb | |
|---|---|---|---|
| Negative (n = 17 472) | Positive (n = 883) | ||
| Maternal age, mean (SD), y | 33.1 (4.8) | 31.3 (5.6) | <.001 |
| Maternal race | |||
| Asian | 1762 (10.1) | 47 (5.3) | <.001 |
| Black | 1496 (8.6) | 139 (15.7) | |
| White | 12 307 (70.4) | 411 (46.5) | |
| Otherc | 1478 (8.5) | 236 (26.7) | |
| Unknown | 429 (2.5) | 50 (5.7) | |
| Maternal ethnicityd | |||
| Hispanic | 2282 (13.1) | 335 (38.0) | <.001 |
| Non-Hispanic | 14 699 (84.1) | 514 (58.2) | |
| Unavailable | 483 (2.8) | 34 (3.9) | |
| Maternal public insurance | 3166 (18.1) | 427 (48.4) | <.001 |
| Trimester of maternal SARS-CoV-2 infectione | |||
| First | NA | 68 (7.7) | >.99 |
| Second | NA | 233 (26.4) | |
| Third | NA | 546 (61.8) | |
| Delivery hospital type | |||
| Academic medical center | 10 185 (58.2) | 624 (70.7) | <.001 |
| Community hospital | 7287 (41.7) | 259 (29.3) | |
| Delivery method | |||
| Cesarean | 5731 (32.8) | 300 (34.0) | .47 |
| Vaginal | 11 741 (67.2) | 583 (66.0) | |
| Multiple births | 1099 (6.3) | 71 (8.0) | .04 |
| Delivery admission length of stay, median (IQR), d | 3.00 (2.00-4.00) | 3.00 (2.00-4.00) | .65 |
| Birth | |||
| Preterm | 1740 (10.0) | 117 (13.3) | .002 |
| Term | 15 732 (90.0) | 766 (86.7) | |
| Offspring sex | |||
| Female | 8533 (48.8) | 423 (47.9) | .59 |
| Male | 8939 (51.2) | 460 (52.1) | |
Abbreviation: NA, not applicable.
a
Unless otherwise indicated, data are expressed as No. (%) of mothers of live offspring. Percentages have been rounded and may not total 100. Data were collected between March 1, 2020, and May 31, 2021.
b
Calculated using the Wilcoxon rank sum test, Pearson χ2 test, or Fisher exact test.
c
Includes American Indian or Alaska Native, Native Hawaiian or other Pacific Islander, and more than 1 race.
d
Ethnicity was unknown for 8 mothers in the COVID-19–negative group.
e
Trimester of infection was unknown for 36 mothers in the COVID-19–positive group.