Improving diagnostic accuracy: a comparison of interactive and Delphi consultations

Area of Science:

• Radiology
• Medical Decision Making
• Health Services Research

Background:

• Physician consultation is vital for accurate medical diagnoses, often informal and interactive.
• Non-interactive methods may offer superior problem-solving efficacy.
• The Delphi approach, utilizing anonymous pooled information and feedback, is a notable non-interactive technique.

Purpose of the Study:

• To compare the diagnostic accuracy of independent decision-making, interactive group consultation, and Delphi techniques.
• To evaluate the effectiveness of different consultation methods in a clinical radiology setting.

Main Methods:

• 17 radiologists interpreted radiologic examinations under three conditions: independent, interactive group, and Delphi.
• Diagnostic accuracy was the primary outcome measure.

Main Results:

• Interactive consultation improved diagnostic accuracy by 69% compared to individual interpretation.
• Two Delphi strategies yielded an additional 20% mean improvement in accuracy over interactive consultation.
• Delphi enhanced the performance of top readers by 25%, compared to 6% for interactive consultation.

Conclusions:

• The Delphi approach is an effective and practical method for clinical consultation.
• Delphi significantly enhances diagnostic accuracy, particularly for complex cases.
• Further evaluation of Delphi in diverse clinical settings is warranted.