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Table 3 Univariate linear regression analysis for the factors associated with Hb level

From: Effect of long-acting erythropoiesis-stimulating agents on hemoglobin levels at the initiation of dialysis

  Regression coefficient 95 % CI P
Age, years .036 −0.002 .010 .195
Male .047 −0.023 .320 .089
Diabetes .059 .014 .343 .033
BMI .018 −0.024 .012 .524
Duration of nephrologist care .013 .000 .000 .655
Vascular access .151 .320 .674 .000
Diabetic nephropathy .026 −0.112 .039 .339
Systolic BP .014 −0.004 .002 .622
Diastolic BP .048 −0.001 .011 .090
CTR .157 −0.05 −0.022 .000
Albumin .176 .330 .619 .000
Creatinine .162 −0.1 −0.05 .278
eGFR .187 .090 .163 .000
Total cholesterol .11 .001 .005 .000
Triglyceride .074 .000 .003 .013
HDL-C .040 −0.002 .009 .188
Calcium .201 .223 .383 .000
Phosphate .088 −0.134 −0.032 .001
Ca x P product .020 −0.004 .008 .467
i-PTH .049 −0.001 .000 .113
C-reactive protein .002 −1.087 1.016 .948
Glucose .016 −0.001 .002 .585
Fe .068 .000 .005 .021
TIBC .087 .001 .005 .003
Ferritin .074 −0.001 .000 .013
ESAa .031 −.079 .285 .268
Long-acting ESAb .205 0.524 0.967 .000
Dose of ESA, per 1000 units .075 .002 .019 .015
ARB/ACE-I .019 −0.113 .233 .497
Vitamin D .020 −0.12 0.253 .484
AST-120 .017 −0.148 .275 .554
Iron .000 −0.176 .176 .999
  1. BMI body mass index, BP blood pressure, CTR cardiothoracic ratio, eGFR estimated glomerular filtration rate, HDL-C high density lipoprotein, i-PTH intact parathyroid hormone, CRP c-reactive protein, TIBC total iron-binding capacity, ESA erythropoiesis-stimulating agents, ARB angiotensin receptor blocker, ACE-I angiotensin-converting enzyme inhibitor
  2. aDummy variables was used for usage of any type of ESA (0 for not used, 1 for used)
  3. bDummy variables was used for type of ESA (0 for short-acting ESA, 1 for long-acting ESA)