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Related Experiment Videos

Variation in proficiency testing performance by testing site

T M Stull1, T L Hearn, J S Hancock

  • 1Centers for Disease Control and Prevention, Public Health Practice Program Office, Division of Laboratory Systems, Atlanta, Ga 30341, USA.

JAMA
|February 18, 1998
PubMed
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Clinical Laboratory Improvement Amendments of 1988 (CLIA) data show hospitals and independent labs had better proficiency testing (PT) performance than other sites. This highlights a performance gap in PT under CLIA regulations.

Area of Science:

  • Clinical laboratory science
  • Healthcare quality assurance
  • Regulatory compliance

Background:

  • The Clinical Laboratory Improvement Amendments of 1988 (CLIA) established uniform quality standards for US testing sites.
  • Proficiency testing (PT) performance and inspections are key CLIA indicators.

Purpose of the Study:

  • To assess variations in PT performance across different testing facility types.
  • Evaluate performance during the first year of mandatory CLIA participation.

Main Methods:

  • Analyzed over 1.2 million PT scores from 17,058 sites in 1994.
  • Categorized sites into Hospitals and Independent Laboratories (HI) and All Other Testing sites (AOT).
  • Compared satisfactory and unsatisfactory performance rates between HI and AOT groups.

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Main Results:

  • Aggregate satisfactory performance rates were 97% for HI and 91% for AOT.
  • The odds of unsatisfactory PT performance were 2.89 times higher for AOT compared to HI.
  • Individual analyte odds ratios for unsatisfactory performance ranged from 2.19 to 7.51.

Conclusions:

  • A notable difference in PT performance existed between testing facility types under CLIA.
  • Traditional sites (hospitals, independent labs) demonstrated superior PT performance.
  • Alternative, newly regulated sites showed lower satisfactory performance rates.