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Comparison of Chemcard cholesterol test and laboratory cholesterol measurements
1Biochemistry Department, Illawarra Regional Hospital, Wollongong, NSW.
Insights
The Chemcard cholesterol test shows poor agreement with laboratory results, potentially misclassifying patient risk. Formal laboratory cholesterol measurement remains necessary.
Area of Science:
- Clinical Chemistry
- Diagnostic Accuracy
- Cardiovascular Risk Assessment
Background:
- The Chemcard cholesterol test is intended for preliminary cholesterol level estimation in general practice settings.
- Elevated levels detected by Chemcard may prompt referral for laboratory confirmation.
- This study evaluates the diagnostic performance of the Chemcard test.
Purpose of the Study:
- To compare the accuracy of the Chemcard cholesterol test against a standardized laboratory procedure.
- To assess the reliability of Chemcard for estimating cholesterol levels.
Main Methods:
- The Chemcard cholesterol procedure was applied to 200 community subjects.
- Participants were enrolled in a cardiovascular risk assessment program.
- Paired measurements from Chemcard and laboratory methods were analyzed.
Main Results:
- A correlation coefficient of 0.83 was observed between Chemcard and laboratory cholesterol measurements.
- Chemcard results were slightly higher than laboratory results (mean difference: 0.16 +/- 0.58 mmol/L).
- Significant risk group misclassification was identified.
Conclusions:
- The Chemcard cholesterol test demonstrates poor agreement with laboratory methods.
- The test's potential for misclassification suggests it is not a reliable standalone system.
- Formal laboratory cholesterol measurement is still required, refuting manufacturer claims.
Background:
The Chemcard cholesterol test has been designed to estimate cholesterol levels in patients in General Practitioners' surgeries. The patients displaying elevated cholesterol levels may then be referred for a more accurate test at a recognised laboratory.
Aims:
To compare the accuracy of the Chemcard cholesterol procedure with a standardised laboratory procedure for estimating cholesterol levels.
Methods:
The Chemcard cholesterol procedure was applied to 200 subjects from the community, who were enrolled in a cardiovascular risk assessment programme.
Results:
The correlation coefficient between the paired measurements was 0.83. The Chemcard cholesterol procedure gave slightly higher results than did the laboratory procedure as shown by the mean (+/-standard deviation) difference between the two methods of 0.16 +/- 0.58 mmol/L.
Conclusions:
The poor agreement between the two methods and the potential misclassification by Chemcard suggests that the Chemcard is not a reliable test system. The high level of risk group misclassification found in this study refutes the manufacturer's claims and does not eliminate the need for formal laboratory cholesterol measurement.