Diagnostic accuracy of clinical tests for sciatic

Authors: Hal D Martin Benjamin R Kivlan Ian J Palmer RobRoy L Martin

Publish Date: 2013/11/12

Volume: 22, Issue: 4, Pages: 882-888

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Abstract

Thirtythree individuals female = 25 and male = 8 with a mean age of 43 years range 15–64 SD ± 11 years were included in the study Twentythree subjects had endoscopic findings of sciatic nerve entrapment Ten subjects without entrapment during endoscopic assessment were used as a control group The results of the SLR active piriformis and seated piriformis stretch tests were retrospectively reviewed for each subject and compared between both groups The accuracy of these tests for the endoscopic finding of sciatic nerve entrapment was determined by calculating the sensitivity specificity positive likelihood ratio negative likelihood ratio and diagnostic odds ratioThe SLR had sensitivity of 015 specificity of 095 positive likelihood ratio of 320 negative likelihood ratio of 090 and diagnostic odds ratio of 359 The active piriformis test had sensitivity of 078 specificity of 080 positive likelihood ratio of 390 negative likelihood ratio of 027 and diagnostic odds ratio of 1440 The seated piriformis stretch test had sensitivity of 052 specificity of 090 positive likelihood ratio of 522 negative likelihood ratio of 053 and diagnostic odds ratio of 982 The most accurate findings were obtained when the results of the active piriformis test and seated piriformis stretch test were combined with sensitivity of 091 specificity of 080 positive likelihood ratio of 457 negative likelihood ratio of 011 and diagnostic odds ratio of 4200

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