GDF15 and hydrops fetalis: Interestingly, decrease in GDF-15 levels from admission to discharge was also associated with decreased hazards and incidence of 30-day HF rehospitalization in both univariate (CSHR 0.17, CI 0.06–0.46; SDHR 0.17, CI 0.08–0.36) and multivariate analyses (CSHR 0.25, CI 0.08–0.78; SDHR 0.25, CI 0.10–0.65).