For 30-day HF rehospitalization (Tables 9 and 10), GDF-15 level at discharge was significantly associated with increased hazard and incidence of 30-day HF readmission in both univariate (CSHR 1.92, CI 1.01–3.65; SDHR 1.92, CI 1.18–3.13) and multivariate analyses (CSHR 2.45, CI 1.75–5.13; SDHR 2.43, CI 1.26–4.71). The gene discussed is GDF15; the disease is hydrops fetalis.