In a sensitivity analysis, this nested MFTB cohort used for the measurement of copeptin demonstrated a similar distribution of maternal characteristics (age, BMI, race, gravida, parity) and maternal comorbidities (chronic hypertension, preeclampsia, diabetes, multiple gestations, and mood disorder diagnoses) in SSRI-treated and untreated groups as the larger parent retrospective cohort of 18,604 patients (Online Resource 1). This evidence concerns the gene AVP and preeclampsia.