2.6. Pain Measurement
knee pain, pain
Before FR intervention was performed in the second postoperative week, the degree of pain was measured using the VAS during knee joint ROM measurement. The VAS allows patients to estimate knee pain by marking an X on a 100-mm line (0 mm for no pain, 100 mm for worst possible pain). The pain was defined as the pain at the maximum ROM the patient could tolerate. The VAS has the highest–retest reliability and has been shown to correlate with other tests of pain intensity [