GDF15 and hydrops fetalis: Similarly, using a threshold of 6221.50 pg/mL, GDF-15 levels above this value were associated with an increased hazard and incidence of 90-day HF rehospitalization in univariate analysis (CSHR 2.71, CI 1.002–7.34; SDHR 2.68, CI 1.02–7.03).