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Table 1 Descriptive statistics for demographic and clinical covariates

From: Evidence for the placenta-brain axis: multi-omic kernel aggregation predicts intellectual and social impairment in children born extremely preterm

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  
 Case 35 (9.3%)
 Control 344 (90.7%)
Race  
 White 233 (61.5%)
 Black 112 (29.5%)
 Other 34 (9.0%)
Sex of baby  
 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  
 Not inflamed 252 (66.5%)
 Inflamed 127 (33.6%)
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