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Table 4 Fourfold data of CT criteria indicated CT scan had a sensitivity of 22% and a specificity of 96%

From: Pedicle screw loosening: the value of radiological imagings and the identification of risk factors assessed by extraction torque during screw removal surgery

CT scanning

Loose

Not loose

p value

Positive

12 (22%)

5 (4%)

0.001a

Negative

43 (78%)

107 (96%)

 
  1. Positive—no density zones around screw
  2. aChi-square test
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Journal of Orthopaedic Surgery and Research

ISSN: 1749-799X