Comparison of Short-Term Effects of Extracorporeal Shock Wave Therapy, Low-Level Laser Therapy and Pulsed Electromagnetic Field Therapy in Knee Osteoarthritis: A Randomized Controlled Study.

Knee osteoarthritis (OA) is the most prevalent form of osteoarthritis and a leading cause of chronic pain in adults. This study aimed to compare the short-term effects of extracorporeal shock wave therapy (ESWT), low-level laser therapy (LLLT), and pulsed electromagnetic field therapy (PEMF) on pain, function, and quality of life in patients with knee OA. A hundred and twenty patients with Kellgren-Lawrence grade 2-3 knee OA were randomized into four groups: ESWT (once a week for three sessions), LLLT (twice a week for eight sessions), PEMF (twice a week for eight sessions), and a control group with 30 patients in each group. All participants were instructed in a daily exercise program, including knee joint range of motion, stretching, and strengthening exercises (3 × 10 repetitions). Outcome measures, including the visual analog scale (VAS), the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), Short Form-36 (SF-36), and the Timed Up and Go (TUG) test, were assessed at baseline after treatment and at the third month. There were no significant differences between groups at baseline regarding VAS, WOMAC, SF-36, and TUG scores ( > 0.05). Significant improvements were observed in all parameters post-treatment for all groups ( < 0.001). However, the improvements in the PEMF group were significantly lower than in the ESWT and LLLT groups, particularly for VAS, WOMAC pain, and SF-36 physical function scores ( < 0.05). No significant differences were found between ESWT and LLLT ( > 0.05). In the short-term, ESWT, LLLT, and PEMF effectively reduce pain, improve physical function, and enhance quality of life in patients with knee OA, though PEMF showed less pronounced improvements.