The Evaluation of Red Cell Distribution Width in Chronic Hemodialysis Patients

Table 2

The comparative clinical and laboratory data of HD patients.

Parameter	Group 1 (𝑛=92)	Group 2 (𝑛=81)	Group 3 (𝑛=74)	Group 4 (𝑛=49)	𝑃
Hemoglobin (g/dL)	12.9±0.8	13.1±1.0	13.0±1.0	12.8±0.7	>0.05*
Hematocrit (%)	41.8±4.6	43.7±5.8	40.2±4.2	39.7±4.1	>0.05*
RDW (%)	𝟏𝟑.𝟐±𝟏.𝟒	𝟏𝟒.𝟕±𝟏.𝟔^‡	𝟏𝟕.𝟖±𝟏.𝟗^§	𝟏𝟖.𝟓±𝟐.𝟎^¶	𝟎.𝟎𝟏𝟒^∗
MCV (fL)	85.9±7.4	83.7±6.1	88.5±5.2	91.4±6.0	>0.05*
MCH (pg)	28.4±2.7	27.9±3.0	31.3±2.9	30.2±3.5	>0.05*
MCHC (g/dL)	34.5±1.4	35.2±1.7	34.0±1.3	33.1±1.0	>0.05*
TS (%)	33.8±17.1	36.1±14.7	34.5±19.8	38.6±18.4	>0.05^†
Ferritin (ng/mL)	627.1±112.6	734.6±140.3	662.8±130.8	704.4±142.9	>0.05*
Creatinine (mg/dL)	𝟖.𝟗±𝟑.𝟏	𝟏𝟎.𝟓±𝟑.𝟗	𝟖.𝟐±𝟒.𝟎	𝟗.𝟔±𝟒.𝟖	𝟎.𝟎𝟐𝟔^†
Calcium (mg/dL)	9.1±1.6	9.6±1.8	8.9±1.3	9.2±1.6	>0.05*
Phosphate (mg/dL)	5.1±1.0	5.3±1.1	4.5±0.8	4.7±0.9	>0.05*
Total cholesterol (mg/dL)	𝟏𝟕𝟖.𝟖±𝟔𝟎.𝟏	𝟏𝟗𝟑.𝟕±𝟖𝟏.𝟓	𝟏𝟔𝟐.𝟒±𝟔𝟓.𝟖	𝟏𝟓𝟓.𝟕±𝟓𝟖.𝟏	𝟎.𝟎𝟒𝟓^†
Triglyceride (mg/dL)	𝟏𝟖𝟑.𝟐±𝟕𝟔.𝟒	𝟏𝟗𝟏.𝟑±𝟔𝟐.𝟖	𝟏𝟓𝟒.𝟒±𝟓𝟖.𝟕	𝟏𝟓𝟗.𝟐±𝟔𝟓.𝟓	𝟎.𝟎𝟑𝟖^†
HDL-cholesterol (mg/dL)	32.1±7.4	37.2±8.5	33.8±6.8	30.7±6.2	>0.05*
LDL-cholesterol (mg/dL)	𝟏𝟐𝟐.𝟑±𝟑𝟗.𝟕	𝟏𝟒𝟓.𝟕±𝟒𝟔.𝟖	𝟏𝟏𝟎.𝟓±𝟑𝟕.𝟐	𝟏𝟎𝟑.𝟒±𝟒𝟖.𝟕	𝟎.𝟎𝟐𝟗^†
Albumin (g/dL)	𝟒.𝟏±𝟎.𝟒	𝟑.𝟖±𝟎.𝟑	𝟑.𝟑±𝟎.𝟑	𝟑.𝟎±𝟎.𝟐	𝟎.𝟎𝟑𝟓^∗
CRP (mg/L)	𝟑.𝟓±𝟐.𝟒	𝟕.𝟗±𝟐.𝟏	𝟒.𝟏±𝟐.𝟕	𝟗.𝟔±𝟒.𝟐	𝟎.𝟎𝟐𝟒^∗
iPTH (pg/mL)	286.5±132.7	261.3±102.2	278.4±130.1	301.2±119.7	>0.05^†
URR (%)	0.71±0.05	0.74±0.06	0.69±0.03	0.70±0.04	>0.05*
kT/V	1.54±0.21	1.50±0.26	1.48±0.31	1.53±0.25	>0.05*

∗One-way ANOVA (for parametric data).
†Kruskal Wallis test (for nonparametric data).
‡RDW difference between group 1 and group 2, post hoc 𝑃=0.028 (Tukey's test).
§RDW difference between group 3 and group 1, post hoc 𝑃=0.017; group 3 versus group 2, post hoc 𝑃=0.031 (Tukey's test).
¶RDW difference between group 4 and group 1, post hoc 𝑃=0.004; group 4 versus group 2, post hoc 𝑃=0.019; group 4 versus group 3, post hoc 𝑃=0.041 (Tukey's test).
RDW: red cell distribution width, MCV: mean corpuscular volume, MCH: mean cell hemoglobin, MCHC: mean corpuscular hemoglobin concentration, TS: transferrin saturation, LDL: low-density lipoprotein cholesterol, HDL: high-density lipoprotein, CRP: C-reactive protein, iPTH: intact parathyroid hormone, and URR: urea reduction ratio.