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Family Practice Advance Access published online on November 4, 2004
Family Practice, doi:10.1093/fampra/cmh604
© 2004 by Oxford University Press
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Received June 30, 2004
Accepted July 20, 2004

Article

Patient-clinician agreement on signs and symptoms of ‘strep throat’: a MetroNet study

Jinping Xu 1*, Kendra Schwartz 1, Joseph Monsur 1, Justin Northrup 1, and Anne Victoria Neale 1

1 Department of Family Medicine, Wayne State University, Detroit, MI, USA

* To whom correspondence should be addressed.
Jinping Xu, E-mail: jxu{at}med.wayne.edu


  Abstract

Background. Despite substantial use of the telephone in health care, only a few studies have formally evaluated the appropriateness of telephone-based management for acute medical problems. The accuracy of patients' report of signs and symptoms remains unknown.

Objective. We compared the agreement between patient self-assessment and clinician assessment on the typical signs and symptoms of group A {beta}-haemolytic Streptococcus (GABHS) to investigate the potential difficulties of using patient self-report to triage sore throat patients.

Methods. In this cross-sectional study, each of 200 adult pharyngitis patients was instructed to examine him/herself and to record the symptoms and physical findings. Two clinicians independently interviewed and examined each patient and recorded their findings. Each patient then had a rapid GABHS antigen test, the results of which were blinded to both clinicians and patients. Each patient self-assessment was compared with the findings of each clinician, and the agreement and disagreement between them computed.

Results. We found varying levels of agreement ({kappa} = -0.05 to 0.71) between patients and clinicians on sore throat history and physical assessments. Importantly, there was fair to substantial agreement ({kappa} = 0.20-0.71) on the key signs and symptoms used in GABHS clinical prediction rules. As expected, history items had the highest agreement ({kappa} = 0.52-0.71). Patients were more likely than clinicians to report rather than deny a specific physical sign.

Conclusion. Adult sore throat patients may reliably report their symptoms, but may not be able to assess and report accurately on relevant physical signs of pharyngitis. Patients have a tendency to over-report physical signs. This study indicates the potential difficulties associated with telephone triage of sore throat patients, or other illnesses that require assessment of physical signs.

Keywords: Group A {beta}-haemolytic Streptococcus; interobserver agreement; kappa coefficient; pharyngitis; sore throat; telephone triage.
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