2.3.3. Pressure Pain Threshold (PPT) with Pressure Algometry
sacroiliac joints, pain
Pressure pain threshold (PPT) is defined as the minimal amount of pressure that produces pain. The PPT assessment was performed with a digital algometer (Wagner FPX 25 Digital Algometer; Wagner Instruments, Greenwich, CT, USA) bilaterally in the quadratus lumborum muscle, in the sacroiliac joints, and paravertebrally in the L4-L5 intervertebral space. The metal rod of the algometer was placed vertically on the site and the examiner applied gradually increasing pressure at a rate of 1 kg/s. The PPT was calculated in kg/cm