The stressful life event and family adversity scores were standardized to allow a more valid comparison of effect sizes between these variables and with dichotomous variables such as maternal psychopathology. Therefore regression coefficients have been provided for maternal psychopathology but standard regression coefficients (independent variables standardized) have been provided for stressful life event and family adversity scores (Tables 2 and 3). Beta values are presented with 95% confidence intervals. Environmental effects are reported either for a one SD increase in continuous measures or as the additional impact in the presence of adversity (compared to absence) for dichotomous measures.
