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Cumulative mortality risk in patients with 48-h blood urea nitrogen (BUN) levels of ≥8 mg/dl or <8 mg/dl. The lower limit of normal value for BUN is 8 mg/dl. This graph is based on the multivariate Cox regression model of a subset of 129 patients who received continuous sustained low-efficiency dialysis (C-SLED) for at least 48 h (Table 5).
