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Table 2 Baseline characteristics of the study subjects according to the PEW score

From: A simple protein-energy wasting score for survival prediction of maintenance hemodialysis patients

   Scores 0–1 Score 2 Score 3 Score 4
Clinical and laboratory parameters All Severe wasting Moderate wasting Slight wasting Normal nutritional status
Number of patients 254 36 82 97 39
Number of deaths 26 11 7 5 3
Age (years) 59.3 ± 12.8 66.2 ± 11.5** 63.1 ± 11.8** 55.9 ± 12.6 53.6 ± 11.3
Male (%) 72.8 % 75.0 % 69.5 % 70.1 % 84.6 %
Dry weight (kg) 60.2 ± 13.5 56.2 ± 9.6** 56.8 ± 14.0** 60.4 ± 13.2** 70.7 ± 10.2
BSA (m2) 1.65 ± 0.20 1.59 ± 0.17** 1.59 ± 0.21** 1.65 ± 0.20** 1.78 ± 0.16
Dialysis vintage (years) 11.0 ± 7.7 8.8 ± 7.7 11.0 ± 6.9 12.0 ± 8.1 10.3 ± 7.8
C-reactive protein (mg/dL) 0.29 ± 0.41 0.31 ± 0.29 0.31 ± 0.43 0.26 ± 0.31 0.33 ± 0.63
Serum albumin (g/dL) 3.88 ± 0.32 3.60 ± 0.28** 3.76 ± 0.29** 3.98 ± 0.27** 4.13 ± 0.19
SCr (μmol/L) 1050 ± 217 808 ± 185** 999 ± 178** 1120 ± 173* 1208 ± 200
SCr/BSA (μmol/L/m2) 641 ± 121 507 ± 101** 632 ± 110* 684 ± 108 678 ± 99
Kt/V 1.45 ± 0.24 1.39 ± 0.23 1.47 ± 0.24* 1.49 ± 0.24* 1.38 ± 0.19
nPCR (g protein/kg/day) 0.93 ± 0.17 0.78 ± 0.14** 0.88 ± 0.16** 1.00 ± 0.16 1.01 ± 0.13
  1. BSA body surface area, Scr serum creatinine, Kt/V single pool urea kinetics, nPCR normalized protein catabolic rate
  2. *P < 0.001 versus score 4; **P < 0.05 versus score 4