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. 2009 Aug;4(8):1338–1346. doi: 10.2215/CJN.02130309

Table 6.

Measurements (mean ± SD or percent) in patients with 48-h BUN levels <8 mg/dl or ≥8 mg/dl

BUN mg/dl
P Value
<8 mg/dl (30) ≥8 mg/dl (99)
Age (years) 55 ± 16 (30) 57 ± 16 (99) 0.60
Weight (kg) 76 ± 21 (30) 90 ± 22 (99) 0.001
Serum albumin, pre–C-SLED 2.40 ± 0.80 (28) 2.24 ± 0.70 (81) 0.10
SOFA score 12.6 ± 4.1 (30) 13.2 ± 3.7 (99) 0.44
Mortality (%) 70 (30) 55 (99) 0.028
BUN (mg/dl), pre–C-SLED 46 ± 18 (30) 73 ± 33 (99) 0.001
BUN (mg/dl), 24-h C-SLED 9 ± 5 (28) 23 ± 12 (97) 0.002
BUN (mg/dl), 48-h C-SLED 4.5 ± 1.8 (30) 17.0 ± 9.8 (99) 0.0001
TPN (%), pre–C-SLED 3 (30) 9 (99) 0.001
TPN (%), 24-h C-SLED 4 (30) 14 (99) 0.001
TPN (%), 48-h C-SLED 7 (30) 19 (99) 0.0001
Serum creatinine (mg/dl), pre–C-SLED 3.25 ± 1.24 (30) 3.32 ± 1.80 (99) 0.86
Serum creatinine (mg/dl), 48-h C-SLED 0.78 ± 0.36 (30) 1.06 ± 0.83 (98) 0.09

BUN, blood urea nitrogen; C-SLED, continuous sustained low-efficiency dialysis; SOFA, sequential organ failure assessment; TPN, total parenteral nutrition. The lower limit of normal value for BUN is 8 mg/dl.