NPPB and chronic kidney disease: We examined whether these parameters predict the risk of unplanned dialysis.<h4>Study design setting & population</h4>This retrospective cohort study included 231 CKD patients initiating maintenance dialysis between 2014 and 2024 at a single Japanese university hospital.<h4>Predictors & outcomes</h4>Predictors were BNP levels and BW ratios, defined as the 3-month value divided by the average of values obtained 6-12 months before dialysis initiation.