Table 4: Sensitivity and specificity of MRI measurements.

VariableSensitivitySpecificityP value

Ulnar nerve hyperintensity90%80%<0.001
Ulnar nerve swelling42%100%0.01
Ulnar nerve hyperintensity and swelling42%100%0.01
Ulnar nerve compression33%100%0.06

MRI: magnetic resonance imaging.