Efficacy of High-Power Laser in Alleviating Pain and Improving Function of Patients With Patellofemoral Pain Syndrome: A Single-Blind Randomized Controlled Trial.

In this study, a single-blind and randomized controlled trial (RCT) for assessing the effectiveness of high-power (up to 12 W) laser therapy (HPLT) on patients with patellofemoral pain syndrome (PFPS) was carried out. Forty-four patients were randomly assigned to two treatment groups by generating random numbers with MATLAB 2014b software, where odd and even numbers were attributed to sham laser group (group A) and actual laser group (group B), respectively. Group B patients underwent HPLT with total dose of 300 J/session for 5 consecutive sessions separated by a 2-day interval.