© 1990 British Society for Rheumatology
brief-report |
RACIAL VARIATION IN SERUM CREATINE KINASE UNRELATED TO LEAN BODY MASS

*Departments of Rheumatology Whittington Hospital, Highgate Hill, London N195NF
Departments of Chemical Pathology Whittington Hospital, Highgate Hill, London N195NF
Correspondence to:
Correspondence to Dr J. Worrall, Bloomsbury Rheumatology Unit, Middlesex Hospital, Arthur Stanley ,Tottenham street, London W1P 9PG
In a group of 30 black and 30 white healthy hospital workers, matched for age, sex and body weight, serum creatine kinase was significantly higher in black males than in white males (P>0.01). Seventeen blacks but only four whites had levels above the accepted upper limit of normal of 195 IU/1. There was no correlation with lean body mass. Elevation of serum creatine kinase need not signify disease in blacks, for whom a separate reference range should be established
Two cases are reported of physically healthy black men subjected to unnecessary investigation on the basis of persistently elevated serum creatine kinase
KEY WORDS: Creatine kinase, Muscle, Racial variation
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