NPPB and hydrops fetalis: Lower SRI was associated with worse New York Heart Association class (adjusted β=-0.009, p=0.007), BI scores (adjusted β=0.310, p<0.001), frailty (adjusted β=-0.017, p<0.001) and QoL (adjusted β=0.344, p=0.001); longer WASO was associated with slower gait speed (adjusted β=-0.039, p=0.040).<h4>Conclusions</h4>Older adults with HF who had inefficient sleep had significantly higher NT-proBNP levels.