Validation and Test-Retest Reliability of New Thermographic Technique Called Thermovision Technique of Dry Needling for Gluteus Minimus Trigger Points in Sciatica Subjects and TrPs-Negative Healthy Volunteers

Table 2

Definitions of validity elements [24, 25].

Validity elements	Definition	Equation
Sensitivity	Proportion of the positive values that the test correctly identifies	() × 100
Specificity	Proportion of the negative values that the test correctly identifies	() × 100
Positive predictive value (PPV)	Proportion of the patients with positive test results who are correctly diagnosed	() × 100
Negative predictive value (PNV)	Proportion of the patients with negative test results who are correctly diagnosed	() × 100