In a pilot study aimed to determine the impact of reiki therapy on the pain perception of patients undergoing total knee arthroplasty (TKA), reiki was shown to have a statistically significant effect on pain reduction.
The study sample included 43 patients undergoing TKA. All subjects had unilateral TKA at the same hospital and were randomized into reiki and non-reiki groups. Pain was assessed before and after reiki therapy using a numeric rating scale.