Tsang, K.L., Carlson, L.E., & Olson, K. (2007). Pilot crossover trial of Reiki versus rest for treating cancer-related fatigue. Integrative Cancer Therapies, 6, 25–35.doi: 10.1177/1534735406298986
Interventions were of two conditions:
Sixteen patients participated in the trial; eight were randomized to each order of condition (Reiki then rest; rest then Reiki). All sessions were administered from the same Reiki master.
The study was a counterbalanced crossover pilot trial of two conditions.
There was a statistically significant change between the pre-first treatment and post-seventh treatment. Scores in the Reiki condition for anxiety were t(16) = 3.38, p < 0.005 (measured on the ESAS VAS for anxiety pre and post Reiki or rest). The Reiki condition demonstrated decrease in daily fatigue compared to rest alone.
The study is a well-designed crossover trial with randomization to groups.
The study had a very limited sample size.