Associations between second trimester psychological distress scores at 16 weeks and third trimester normalized umbilical vein volume blood flow (n = 65).

aCorrelations (Spearman's correlation coefficient) between ordinal psychological distress scores at 16 weeks of gestational age and umbilical vein volume blood flow (QUVAC, normalized for fetal abdominal circumference, ml/min/cm) at 30 weeks.bMann-Whitney U test comparing QUVAC (median, interquartile range) at 30 weeks of gestational age for women scoring below vs. above the mean for psychological distress at 16 weeks.cMissing n = 1 (page of questionnaire left blank).EPDS, Edinburgh Postnatal Depression Scale; GHQ, General Health Questionnaire; IES, Impact of Event Scale; IQR, inter-quartile range; QUVAC, umbilical vein volume blood flow normalized for fetal abdominal circumference (ml/min/cm); rs, Spearman's rank correlation coefficient.