IRCT20191214045724N1 IRCT 2020-02-02 Artesh University of Medical Sciences The effects of tDCS for pain relief of knee osteoarthritis Comparison of tDCS and Sham tDCS for reduction of pain in patients with knee osteoarthritis 2020-01-27 anticipated 54 Complete https://irct.ir/trial/44499 interventional Randomization: Randomized, Blinding: Single blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment, Randomization description: We use block randomization to ensure that the two groups are of the same size. Patients are randomized by blocked randomization of size two or four to the two groups of active or sham tDCS. Random numbers are generated in an independent statistical room using a computer. The units of randomization are individuals. There is no stratification in the randomization process, Blinding description: Our study is a single-blind randomized trial. The participants will be unaware of the sham or active treatment they would receive throughout the study. The investigators and clinicians are not masked to the patients' group assignment. N/A Knee Osteoarthritis. Intervention 1: Intervention group: In this group, stimulation was performed using transcranial direct current stimulation (tDCS) for 5 sessions and for 5 consecutive days using a 35 cm 2 electrode with a current of 2 mA, each stimulation was performed for 20 minutes. Intervention 2: Intervention group: In this group, stimulation was performed using Sham transcranial direct current stimulation (tDCS) for 5 sessions and for 5 consecutive days using a 35 cm 2 electrode with a current of 2 mA, each stimulation was performed for 30 seconds. Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is No more information.