Table 2.
Characteristics* of Cases and Controls
| Characteristic | Control (n=339) | Case (n=276) | P ** |
|---|---|---|---|
|
| |||
| Mothers*** | 333 | 264 | |
|
| |||
| MgSO4 treatment group | 155 (46.6) | 119 (45.1) | 0.72 |
|
| |||
| Maternal age (y) | 26.1 ± 6.1 | 26.1 ± 6.6 | 0.98 |
|
| |||
| Race/Ethnicity | 0.69 | ||
| African American | 146 (43.8) | 112 (42.4) | |
| Caucasian | 117 (35.1) | 88 (33.3) | |
| Hispanic | 65 (19.5) | 57 (21.6) | |
| Other | 5 (1.5) | 7 (2.7) | |
|
| |||
| Education (y) | 12.2±2.7 | 11.5±2.6 | <0.001 |
|
| |||
| Smoked during pregnancy | 73 (21.9) | 82 (31.1) | 0.01 |
|
| |||
| Alcohol during pregnancy | 20 (6.0) | 27 (10.2) | 0.06 |
|
| |||
| Drug use during pregnancy | 21 (6.3) | 33 (12.5) | 0.009 |
|
| |||
| Steroids given | 326 (97.9) | 256 (97.0) | 0.47 |
|
| |||
| Time from steroid treatment to delivery (days) | 5 (2 to 12)# | 6 (2 to 15)# | 0.09## |
|
| |||
| Chorioamnionitis | 41 (12.3) | 33 (12.5) | 0.94 |
|
| |||
| Neonates | |||
|
| |||
| Gestational age at birth (wks) | 30.2 ± 2.3 | 29.5 ± 3.0 | 0.001 |
|
| |||
| Birthweight (g) | 1505 ± 485 | 1363 ± 513 | <0.001 |
*
n (%) or Mean ± SD
**
T-test for continuous variables and Chi-square for frequencies, except where indicated.
***
n reflects fewer mothers due to twin gestations
#
Median (25th to 75th percentile)
##
Wilcoxon rank sums test