NPPB and hydrops fetalis: HF risk identification improved when NT-proBNP levels were combined with WATCH-DM scores, showing greater improvement in low/intermediate risk patients [WATCH-DM score <13] than in those at high risk [WATCH-DM score ≥13] (C-index 0.73 [95% CI 0.71–0.75] vs. 0.71 [95% CI 0.68–0.74]) (69).