Managing sore throat: theory versus practice.

Area of Science:

• Family Medicine
• Infectious Diseases
• Clinical Diagnostics

Background:

• Sore throat is a common ailment in primary care.
• Accurate diagnosis of Group A β-hemolytic streptococcal (GABHS) pharyngitis is crucial to guide antibiotic therapy.
• Clinical impression is often used to guide diagnosis, but its accuracy is debated.

Purpose of the Study:

• To evaluate the reliability of clinical impression in diagnosing GABHS pharyngitis.
• To assess the accuracy of primary care physicians' predictions of GABHS in sore throat patients.

Main Methods:

• Five rural Ontario family physicians evaluated 222 patients with sore throats.
• Clinical impression of GABHS or non-GABHS pharyngitis was recorded for each patient.
• Throat cultures were performed for all patients to confirm diagnosis.

Main Results:

• Physicians predicted 50% of cases would be positive for GABHS, but only 13.5% were confirmed by culture.
• The clinical diagnosis of "strep throat" was correct in only 20% of cases.
• Without throat cultures, an estimated 112 patients would have received unnecessary antibiotics.

Conclusions:

• Clinical prediction of GABHS pharyngitis is highly inaccurate.
• Over-reliance on clinical judgment can lead to significant overuse of antibiotics.
• Throat cultures are essential for accurate diagnosis and appropriate management of sore throats.