Signs and Evidence

Making clinical sense of scientific data


Hypalgesia in median nerve territory

Carpal tunnel syndrome
 Positive likelihood ratio
3.10 ( Christopher A et al. )
3.40 ( Kuhlman K et al. )
(average) 3.25
Negative likelihood ratio
0.70 ( Christopher A et al. )
0.58 ( Kuhlman K et al. )
(average) 0.64

Sources used:

1.Christopher A et al. Does This Patient Have Carpal Tunnel Syndrome? JAMA. 2000;283(23):3110-3117
2.Kuhlman K et al. Sensitivity and specificity of carpal tunnel syndrome signs. American Journal of Physical Medicine & Rehabilitation. 76(6):451-457, nov 1997