Letters

Measurement presents technical difficulties

BMJ 1996; 312 doi: https://doi.org/10.1136/bmj.312.7032.709b (Published 16 March 1996) Cite this as: BMJ 1996;312:709
  1. W A Bartlett,
  2. A F Jones
  1. Principal clinical scientist Consultant chemical pathologist Department of Clinical Biochemistry, Birmingham Heartlands Hospital, Birmingham B9 5SS

    EDITOR,—In their evaluation of measurement of the prostate specific antigen concentration as a screening test for prostatic cancer Carol Parkes and colleagues advocate the use of values expressed as multiples of the median value in a healthy population matched for age.1 Currently, laboratories report actual numerical values for prostate specific antigen.

    The authors do not discuss the technical difficulties in measuring the low prostate specific antigen concentrations seen in healthy men, which …

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