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Table 8 Bioelectrical impedance analysis (BIA) measurement, subjective global assessment (SGA) and serum albumin levels  of the all subjects according to tertiles of protein intake

From: Foods contributing to nutrients intake and assessment of nutritional status in pre-dialysis patients: a cross-sectional study

Parameters Tertiles of protein intake
(n = 256)1
P value3,6
Tertile 1
(n = 85)
Tertile 2
(n = 86)
Tertile 3
(n = 85)
Bioelectrical impedance analysis
 Phase angle, PhA (degrees) 5.1 ± 0.7b 2 5.3 ± 0.7b 5.6 ± 0.8a < 0.001
 Body cell mass, BCM (kg) 29.3 ± 7.0b 30.9 ± 5.7ab 32.8 ± 5.5a < 0.01
 Intracellular water, ICW (L) 20.4 ± 4.9b 21.6 ± 4.0ab 22.9 ± 3.8a < 0.01
 Extracellular water, ECW (L) 13.0 ± 3.0b 13.6 ± 2.4ab 14.1 ± 2.7a 0.02
 Total body water, TBW (L) 33.4 ± 7.9b 34.6 ± 7.8ab 37.1 ± 6.1a < 0.01
 Extracellular fluid, ECF (ECW/TBW) 0.39 ± 0.01a 0.39 ± 0.01ab 0.38 ± 0.01b < 0.001
 Bone mineral content, BMC (kg) 2.5 ± 0.6b 2.6 ± 0.4ab 2.8 ± 0.4a < 0.01
Subjective global assessment
 SGA score 6.3 ± 0.9b 6.5 ± 0.7a 6.6 ± 0.7a 0.04
 Malnutrition, n (%) 5 18 (21.2)4 7 (8.1) 6 (7.1) < 0.01
Biochemical data
 Serum albumin (g/dL) 4.1 ± 0.3b 4.2 ± 0.3ab 4.3 ± 0.3a < 0.01
  1. 1 The subjects were classified into 3 groups according to tertiles of protein intake in all subjects
  2. 2 The data are presented as means ± standard deviations
  3. 3 One-way ANOVA was performed to compare parameters according to tertiles of protein intake. Means with different letters indicate significant differences (P < 0.05) by Bonferroni multiple comparison test
  4. 4 The data are presented as number (percentage)
  5. 5 Malnourished patients were assessed using modified SGA (subjective global assessment)
  6. 6 Chi-square test was performed to compare the categorical parameters (malnutrition) according to tertiles of protein intake