Is interferential current effective in the management of pain, range of motion, and edema following total knee arthroplasty surgery? A randomized double-blind controlled trial

113 patients scheduled for total knee arthroplasty were randomized to postoperative management with either active or sham interferential current therapy. Patients were primarily assessed for outcome related to pain on a visual analog scale, with secondary outcomes of knee range of motion, knee circumference, and paracetamol consumption. Outcomes were assessed after 5 days and 1 month. Results for the primary outcome demonstrated no significant differences between groups at 5 days or 1 month. Results demonstrated no significant differences between groups for all measures, with the exception of paracetamol consumption after 5 days, which was lower in the active IFC group.