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Table 1 Clinical characteristics and exercise capacity

From: Association between chronic kidney disease and physical activity level in patients with ischemic heart disease

  All patients
(n = 245)
Stage G1-G2
CKD (n = 131)
Stage G3-G4
CKD (n = 114)
P
Age (years) 64.6 ± 10.5 61.6 ± 11.0 68.0 ± 8.9 <0.001
Gender (% male) 82.9 81.7 84.2 0.60
Height (m) 1.6 ± 0.1 1.64 ± 0.08 1.62 ± 0.08 0.13
Weight (kg) 63.3 ± 11.5 63.7 ± 12.2 63.0 ± 10.6 0.64
Body mass index (kg/m2) 23.8 ± 3.3 23.7 ± 3.4 23.9 ± 3.1 0.54
Unemployed (%) 50.2 40.5 60.5 0.002
Intervention for IHD     0.79
 CABG (%) 22.0 21.4 22.8  
 PCI (%) 78.0 78.6 77.2  
Comorbidities (%)
 Cerebrovascular disease 8.6 6.9 10.5 0.31
 Orthopedic disorder 17.6 19.1 15.8 0.50
 Diabetes mellitus 39.6 34.4 45.6 0.07
Smoking (%)     0.007
 Current 36.1 43.8 27.2  
 Former 36.9 28.5 46.5  
 Never 27.0 27.7 26.3  
Laboratory data
 Hemoglobin (g/dL) 12.9 ± 1.72 13.1 ± 1.62 12.6 ± 1.80 0.008
 Peak creatine kinase (IU/L) 2841 ± 2583 2871 ± 2460 2778 ± 2743 0.83
 Albumin (g/dL) 3.9 ± 0.4 4.0 ± 0.4 3.9 ± 0.4 0.15
 High-sensitive CRP (mg/dL) 0.76 ± 0.33 0.80 ± 1.19 0.73 ± 1.24 0.67
 eGFR (mL/min/1.73 m2) 61.5 ± 18.4 74.5 ± 11.5 46.5 ± 12.5 0.001
 HbA1c (%) 6.03 ± 1.17 6.02 ± 1.29 6.06 ± 1.07 0.87
Left ventricular ejection fraction (%) 50.7 ± 13.3 53.4 ± 11.4 47.5 ± 14.7 0.001
Ankle-brachial index 1.08 ± 0.12 1.09 ± 0.12 1.08 ± 0.13 0.68
Duration of hospital stay (days) 26.8 ± 17.2 24.8 ± 14.4 29.2 ± 19.7 0.04
6-min walk distance (m) 464.6 ± 101.1 470.3 ± 104.2 459.0 ± 97.8 0.43
  1. Values are expressed as mean ± standard deviation or percentage
  2. CABG coronary artery bypass graft, CKD chronic kidney disease, CRP C-reactive protein, eGFR estimated glomerular filtration rate, IHD ischemic heart disease, PCI percutaneous coronary intervention