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Table 4 Trends in relative and standardized standard deviations of all clinical indices by age group

From: Heterogeneity of clinical indices among the older dialysis population—a study on Japanese dialysis population

Age groups

15–29

30–44

45–59

60–74

75–89

90+

Trend analysis

 

Relative CV

p value

Relative CV

p value

Relative CV

p value

Relative CV

p value

Relative CV

p value

Relative CV

p value

Chi-square values

p value

Corrected calcium (mg/dl)

1.069

0.001

1.008

0.134

1

Ref

0.967

<0.001

0.937

<0.001

0.922

<0.001

356.9

<0.001

Phosphate (mg/dl)

1.058

0.006

1.073

<0.001

1

Ref

0.987

0.000

1.041

<0.001

1.105

<0.001

463.8

<0.001

Total cholesterol (mg/dl)

0.993

0.396

0.986

0.038

1

Ref

1.007

0.042

1.007

0.073

1.013

0.160

11.3

0.080

Non-HDL (mg/dl)

0.984

0.299

1.002

0.405

1

Ref

0.993

0.057

0.975

<0.001

0.964

0.008

32.9

<0.001

HDL cholesterol (mg/dl)

0.829

<0.001

0.983

0.021

1

Ref

0.958

<0.001

0.909

<0.001

0.868

<0.001

482.4

<0.001

%creatinine generation rate (%)

0.988

0.347

0.950

<0.001

1

Ref

1.099

<0.001

1.254

<0.001

1.446

<0.001

3282.4

<0.001

Normalized protein catabolic rate (g/kg/day)

0.990

0.370

0.968

<0.001

1

Ref

1.023

<0.001

1.024

<0.001

1.111

<0.001

122.8

<0.001

Albumin (g/dl)

1.126

<0.001

0.999

0.448

1

Ref

1.092

<0.001

1.233

<0.001

1.331

<0.001

3463.1

<0.001

Body height (cm)

1.399

<0.001

1.079

<0.001

1

Ref

0.999

0.401

1.052

<0.001

1.130

<0.001

693.7

<0.001

Postdialytic body weight (kg)

1.167

<0.001

1.172

<0.001

1

Ref

0.847

<0.001

0.825

<0.001

0.808

<0.001

5473.5

<0.001

Body mass index (kg/m2)

1.053

0.013

1.146

<0.001

1

Ref

0.841

<0.001

0.803

<0.001

0.848

<0.001

5456.5

<0.001

Body weight reduction (kg)

1.133

<0.001

1.026

0.001

1

Ref

0.968

<0.001

1.026

<0.001

1.137

<0.001

401.1

<0.001

Fractional body weight reduction (%)

1.029

0.155

1.009

0.123

1

Ref

1.041

<0.001

1.123

<0.001

1.228

<0.001

884.0

<0.001

Session duration (h)

1.071

0.001

1.079

<0.001

1

Ref

0.917

<0.001

0.975

<0.001

1.077

<0.001

1243.2

<0.001

spKt/V

1.010

0.367

1.032

<0.001

1

Ref

0.917

<0.001

0.961

<0.001

1.014

0.160

604.6

<0.001

eqKt/V

1.024

0.207

1.071

<0.001

1

Ref

0.950

<0.001

0.964

<0.001

1.069

<0.001

410.3

<0.001

Blood flow rate (ml/min)

1.098

<0.001

1.034

<0.001

1

Ref

0.970

<0.001

1.003

0.239

1.058

<0.001

243.6

<0.001

Predialytic blood urea (mg/dl)

0.989

0.364

0.986

0.044

1

Ref

1.037

<0.001

1.102

<0.001

1.161

<0.001

620.9

<0.001

Creatinine (mg/dl)

1.032

0.130

0.954

<0.001

1

Ref

1.074

<0.001

1.185

<0.001

1.326

<0.001

1992.9

<0.001

Systolic blood pressure (torr)

0.976

0.164

1.040

<0.001

1

Ref

0.998

0.342

1.034

<0.001

1.095

<0.001

184.0

<0.001

Diastolic blood pressure (torr)

1.126

<0.001

1.061

<0.001

1

Ref

1.036

<0.001

1.102

<0.001

1.186

<0.001

692.0

<0.001

Pulse rate (/min)

1.032

0.100

0.992

0.139

1

Ref

1.045

<0.001

1.089

<0.001

1.095

<0.001

449.3

<0.001

Hemoglobin (g/dl)

1.042

0.035

1.003

0.315

1

Ref

0.998

0.289

1.040

<0.001

1.038

0.001

185.3

<0.001

Glycoalbumin (%)

1.186

0.089

1.171

<0.001

1

Ref

0.877

<0.001

0.826

<0.001

0.887

<0.001

703.6

<0.001

A1c (%)

1.182

0.054

1.128

<0.001

1

Ref

0.899

<0.001

0.868

<0.001

0.842

<0.001

564.6

<0.001

  1. Indicated CVs were relative (i.e., SD of the 45–59 years age group was set as 1) CV. The p values for each age group were calculated from F tests compared with those of the 45 and 59 years age group. Trend analysis was performed using Bartlett’s test; chi-square and p values are shown. HDL high-density lipoproteins, spKt/V single pool Kt/V, eqKt/V equilibrated Kt/V, HbA1c hemoglobin A1c, n number of patients, SD standard deviation, ref reference
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