Meta-analysis on the performance of sonography for the diagnosis of carpal tunnel syndrome.

Objective: We aimed to review and pool recent large methodological studies evaluating the diagnosis performance of ultrasonography vs electrodiagnostic testing (EDX).

Methods: Using the keywords: "carpal tunnel syndrome", "ultrasound", and "validity", recent articles evaluating ultrasonography compared with a reference including EDX were selected from 4 databases (PubMed, Embase, Web of science, and BDSP) and from previous review for older articles, after 2 rounds. Relevant data for different thresholds of cross-sectional area of the median nerve were extracted from the articles to calculate the pooled sensitivity, specificity, and likelihood ratios.