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Background:  Biological variation (BV) and reference change values (RCVs) have been widely described for the general population, but the use of these data derived from adults in the elderly population is a controversial issue. We determined the within- and between-subject BV and RCV in both elderly and young people and compared them with previously published analyses.

Biological variation and reference change values of common clinical chemistry and haematologic laboratory analytes in the elderly population