External quality assessment in gynaecological cytology: The Trent Region experience. The Trent Regional Gynaecological Pathology Quality Assurance Group for the National Health Service Cervical Screening Programme.
A Department of Health Executive Letter stated in 1998 that the principal function of external quality assessment (EQA) is educational. Subsequently, in England, it has no longer been acceptable to assess performance in gynaecological cytology by proficiency testing. This paper describes the EQA scheme in gynaecological cytology that has been run by the Trent Regional Gynaecological Pathology Quality Assurance Group for the NHS Cervical Screening Programme (NHSCSP) since 1998. It conforms as closely as possible to the recommendations published by the Department of Health Working Group on Histopathology EQA Accreditation, and replaced the national proficiency testing protocol. The educational value of the scheme is derived predominantly from a numerical score which provides confidential and quantitative feedback to all participants. Personal performance monitoring occurs as a secondary function. For primary screeners and checkers, this is based purely on the distinction between negative, inadequate and abnormal smears. For pathologists, personal performance monitoring also includes grading of abnormalities. The EQA has been designed so that all professional groups participate in a manner that closely mimics normal practice. Only slides that have achieved an 80% consensus amongst participants are used in the EQA. Substandard performance has been defined as those participants with scores falling below the 2.5%ile. The paper describes the EQA in detail and illustrates its use by means of the second round results. The EQA protocol developed within Trent and described in this paper has contributed to proposals contained in the current national EQA in gynaecological cytology for the NHSCSP. In particular this paper highlights the effectiveness of the scoring system contained within the Trent and National EQA protocols.
Slater
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Quality Assurance Reference Centre for the Trent NHSCSP, Northern General Hospital, Sheffield, UK. David.Slater@sth.nhs.uk
Hewer
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Melling
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Rice
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D004493:Education; D005260:Female; D006801:Humans; D008403:Mass Screening / Q000592:standards*; D013677:Medical Laboratory Science / Q000193:education*; D011361:Professional Competence / Q000592:standards; D011785:Quality Assurance, Health Care; D006113:United Kingdom; D002583:Uterine Cervical Neoplasms / Q000517:prevention & control*; D014626:Vaginal Smears / Q000592:standards*