RT Journal Article SR Electronic T1 The Leeds regional quality control scheme for clinical biochemistry: A progress report JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 875 OP 880 DO 10.1136/jcp.26.11.875 VO 26 IS 11 A1 Howarth, A. T. A1 Noble, R. L. A1 Payne, R. B. A1 Steel, A. E. A1 Teasdale, P. R. YR 1973 UL http://jcp.bmj.com/content/26/11/875.abstract AB The results from a regional quality control scheme for clinical biochemistry are analysed. Comparison with results from an earlier period shows that the quality of several of the 15 routine analyses has improved. The methods by which the sera are produced and distributed, and the weekly results are analysed, are described. Each of the 25 laboratories receives an individual weekly computer printout within 24 hours of the deadline for the receipt of results. At the end of each six-month period a printout is produced ranking each laboratory for `accuracy' and `precision' for each test.