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Table 1 Baseline demographics

From: Limited referral to nephrologists from a tertiary geriatric outpatient clinic despite a high prevalence of chronic kidney disease and anaemia

  65-75 years old (n = 87) 75-85 years old (n = 221) >85 years old (n = 131) All (n = 439)
Male (%) 42 (47.1%) 89 (40.3%) 44 (33.6%) 175 (39.9%)
Estimated Glomerular Filtration Rate (eGFR) (mL/min/1.73 m2) 74.0 ± 26.7 69.4 ± 31.8 59.7 ±24.2 67.4 ± 29.1
Chronic Kidney Disease (CKD) stage (eGFR) (%)     
1 (>90 mL/min/1.73 m2) 33.3 17.2 11.5 18.7
2 (60–90 mL/min/1.73 m2) 34.5 44.8 26.7 37.4
3 (30–60 mL/min/1.73 m2) 26.4 33.9 56.5 39.2
4 (15–30 mL/min/1.73 m2) 2.3 3.2 5.3 3.6
5 (<15 mL/min/1.73 m2) 3.5 0.9 0 1.1
Haemoglobin (g/dL) 13.0 ± 1.7 13.0 ± 1.8 12.6 ± 1.9 12.9 ± 1.8
Mean Cell Volume (fL) 91.3 ± 4.9 91.5 ± 6.7 92.8 ± 6.1 91.9 ± 6.2
Vitamin B12 (pmol/L) 410.9 ± 203.1 409.3 ± 320.0 436.8 ± 360.2 418.1 ± 318.3
Red cell folate (nmol/L) 1087.9 ± 653.8 1477.6 ± 940.9 1082.1 ± 871.3 1294.2 ± 898.3
Ferritin (μg/L) 251.9 ± 491.6 221.3 ± 342.9 169.3 ± 228.2 212.4 ± 345.9
Transferrin saturation (%) 21.6 ± 9.0 17.2 ± 10.2 16.9 ± 8.8 17.9 ± 9.7