Figure 1From: The effectiveness of pulsed electrical stimulation (E-PES) in the management of osteoarthritis of the knee: a protocol for a randomised controlled trial Summary of study procedure. ACR – American College of Rheumatology; WOMAC – Western Ontario and McMaster Universities Osteoarthritis Index; PGA – Patient Global Assessment; SF-36 – Medical Outcomes Study 36-item Short-Form Survey; HAP – Human Activity Profile; GPES – Global Perceived Effectiveness Scale.Back to article page