NPPB and hydrops fetalis: Baseline sST2 was predictive of all-cause death or HF hospitalization (HR for each standard deviation increase of log2(ST2): 1.30 [1.08–1.56]), and changes in sST2 across repeated measurements were even more predictive (HR for each standard deviation increase of the log value2(ST2): 1.85 [1.02–3.33]), independent from serial NT-proBNP [84].