Table 1 Descriptive statistics for demographic and clinical covariates
Continuous variable | Mean, SD, median |
|---|---|
Maternal age (years) | 29.6, 6.61, 29.5 |
Gestational age (days) | 182.5, 9.17, 184.0 |
Birthweight Z-score | 0, 1, 0.05 |
Categorical variable | Number (proportion) |
|---|---|
ASD | Â |
 Case | 35 (9.3%) |
 Control | 344 (90.7%) |
Race | Â |
 White | 233 (61.5%) |
 Black | 112 (29.5%) |
 Other | 34 (9.0%) |
Sex of baby | Â |
 Female | 180 (47.5%) |
 Male | 199 (52.5%) |
Mother’s smoking status |  |
 Non-smoker | 340 (89.7%) |
 Smoker | 39 (10.3%) |
Mother’s insurance status |  |
 Private | 251 (66.2%) |
 Medicaid | 128 (33.8%) |
Placental chorion inflammation | Â |
 Not inflamed | 252 (66.5%) |
 Inflamed | 127 (33.6%) |