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Related Experiment Videos

Creatine kinase reference intervals determined from a multi-centre data pool.

R Bais1, R A Conyers, A M Rofe

  • 1Division of Clinical Chemistry, Institute of Medical and Veterinary Science, Adelaide, South Australia.

Pathology
|October 1, 1988
PubMed
Summary
This summary is machine-generated.

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New reference intervals for creatine kinase (CK) in Australia show higher values for males and females. The upper limit for males may require adjustment for myocardial infarction diagnosis.

Area of Science:

  • Clinical Biochemistry
  • Diagnostic Laboratory Medicine
  • Enzyme Assays

Background:

  • Establishing accurate reference intervals is crucial for interpreting laboratory test results.
  • Creatine kinase (CK) is an enzyme commonly measured to assess muscle damage and aid in diagnosing conditions like myocardial infarction.
  • Existing reference intervals may not accurately reflect current enzyme assay methodologies.

Purpose of the Study:

  • To determine updated reference intervals for creatine kinase (CK) in an Australian population.
  • To evaluate the suitability of these intervals for diagnosing myocardial infarction.
  • To assess the distribution characteristics of CK levels in the studied population.

Main Methods:

  • Data compilation from 10 Australian laboratories performing CK assays at 37°C.

Related Experiment Videos

  • Utilizing N-acetyl cysteine-activated methods for CK measurement.
  • Statistical analysis of pooled data to determine reference intervals, accounting for skewed distributions.

    • Main Results:

    • Pooled creatine kinase distributions for both males and females were skewed and non-Gaussian.
    • Established reference interval for females: 34–180 U/L.
    • Established reference interval for males: 46–300 U/L.

    Conclusions:

    • The determined reference intervals provide updated values for CK in Australia.
    • The upper limit of the male reference interval (300 U/L) may be too high for diagnosing myocardial infarction.
    • Further investigation into population-specific upper limits for males, such as hospital inpatients, is recommended for diagnostic accuracy.