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Evaluation of a Point-of-Care Testing Analyzer for Measuring Peripheral Blood Leukocytes

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A meta-analytic method for summarizing diagnostic test performances: receiver-operating-characteristic-summary point

A S Midgette¹, T A Stukel, B Littenberg

¹Cleveland Veterans Affairs Medical Center, OH 44106.

Medical Decision Making : an International Journal of the Society for Medical Decision Making

|July 1, 1993

Summary

This study introduces a new meta-analytic method for summarizing diagnostic test accuracy. Real-time ultrasonography for deep venous thrombosis showed higher accuracy in symptomatic patients compared to asymptomatic ones.

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Area of Science:

Medical Statistics
Diagnostic Test Evaluation
Radiology

Background:

Accurate summarization of diagnostic test performance is crucial for clinical decision-making.
Existing methods may not adequately account for heterogeneity across studies.
Real-time ultrasonography is a key modality for diagnosing deep venous thrombosis (DVT).

Purpose of the Study:

To develop and validate a meta-analytic method for summarizing diagnostic test performance.
To evaluate the performance of real-time ultrasonography in detecting proximal deep venous thrombosis (DVT).

Main Methods:

A novel meta-analytic approach using summary receiver operating characteristic (ROC) curves and homogeneity tests.
Inclusion criteria were applied to select eight studies on real-time ultrasonography for DVT detection.
Subgroup analyses were performed based on patient symptomatology.

Main Results:

The meta-analytic method successfully summarized test performance, revealing significant differences between symptomatic and asymptomatic patients.
For symptomatic patients, summary true-positive rate (TPR) was 0.97 (95% CI: 0.94–0.99) and summary true-negative rate (TNR) was 0.97 (95% CI: 0.95–0.99).
For asymptomatic patients, summary TPR was 0.66 (95% CI: 0.50–0.81) and summary TNR was 0.96 (95% CI: 0.90–0.99).

Conclusions:

The developed meta-analytic method is effective for summarizing diagnostic test performance.
Real-time ultrasonography demonstrates higher diagnostic accuracy for DVT in symptomatic individuals.
Findings were robust against potential biases like test referral bias or non-independent interpretation.