Portable Transcutaneous Electrical Nerve Stimulation Therapy at Different Frequencies in the Treatment of Knee Osteoarthritis: A Quasi-Experimental Study.

Introduction: The prevalence of knee osteoarthritis is on the raise. This raise has been a huge financial burden to developed countries in treating the disease. Transcutaneous electrical nerve stimulation (TENS) is a cost-effective, easily available, and self-applicable mode of non-pharmacological pain relieve technique.