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Poorly Diagnostic Findings

Carpal Tunnel Syndrome: Likelihood Ratios

Introduction: Actual median nerve neuropathy. See also Forearm Flexor Tenosynovitis - most physical exam findings for Carpal Tunnel Syndrome actually pick up Tenosynovitis in the carpal tunnel (i.e. from flexor tendonitis) far better than they do 'Carpal Tunnel' (i.e. median neuropathy). Tendonitis should be managed medically, while neuropathy would be treated by surgical decompression.

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The likelihood ratios of findings for Carpal Tunnel Syndrome are listed below. See the left navigation bar to change the display.

Pre-Test Probability (Prevalence): %. Post-Test Probability (Predictive Value): %. Switch to display mode.
**Note that calculating probabilities from more than one finding is inherently inaccurate because findings are not independent. (For example, using two positive findings that share a common pathogenesis is likely to overestimate the true probability.)
Poorly Diagnostic Findings
FindingResult +LR-LR
[ + ] Tinel's Sign + 0 - 0.91.1
[ + ] Reverse Phalen's Test + 0 - 0.61.7
[ + ] Carpal Tunnel Compression + 0 - 0.62.2
[ + ] Durkan's Test + 0 - 0.91.3
[ + ] Phalen's Test + 0 - 0.63.1