100 patients with RA fulfilling the 2010 ACR-EULAR classification criteria for RA were recruited from the outpatient clinic of the Rheumatology and Rehabilitation department. All patients were subjected to clinical and laboratory assessment, visual analog score (VAS) scale and Health Assessment Questionnaire (HAQ). Fifty patients were injected intra-articularly with 3 doses of PRP and 50 patients who serve as a control injected with 3 doses of placebo at 4 weeks intervals for the tender joints and revaluated at 1, 3 months post the last injection regarding the same evaluating tools.
