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Table 1 Dialysis populations: demographics and haematological data.

From: Serum free light chain measurement aids the diagnosis of myeloma in patients with severe renal failure

  Whole population (n-142) Multiple myeloma patients (n-41)
Male – percentages 39% 56%
Ethnicity – percentages   
Caucasian 85% 85%
Afro-Caribbean 4% 5%
South-Asian 8% 10%
Other 3% 0%
Median age in years (range) 70 (19–88) 67 (38–84)
Median serum creatinine μmol/L (range) 529 (274–1758) 622 (302–3000)*
Myeloma type – percentages   
IgGκ   24%
IgGλ   22%
IgAκ   7%
IgAλ   15%
IgMλ   2%**
Free κ only   10%
Free λ only   19%
κ light chain class (overall) %   41%
  1. *Serum creatinine significantly higher in multiple myeloma patients compared with the dialysis population as a whole, P < 0.02. **One patient with known chronic lymphocytic leukaemia, in remission, presented with acute renal failure and biopsy proven cast nephropathy. Investigation identified an intact IgM band on immunofixation electrophoresis with an associated λ FLC, bone marrow examination provided a haematological diagnosis of IgM myeloma.