Maternal Preeclampsia Diagnosis Criteria

In the Danish Medical Birth Registry we identified all mothers of the children included in the study. Preeclampsia, eclampsia and HELLP-syndrome in the mother was identified based on DNPR and the following ICD-10 codes: DO11, DO14, DO140, DO141, DO142, DO149, DO15, DO151, DO152, DO159. To ensure correct linkage of mother and the child included in the study the diagnoses of preeclampsia, eclampsia or HELLP-syndrome had to be given maximum 200 days before or 60 days after birth of the child in question. Based on the diagnostic criteria of preeclampsia, eclampsia, and HELLP-syndrome the fetus had to be 20 weeks of gestation or more at the time of diagnosis (23 ).