Effect of chrono-moxibustion and its influence on circadian rhythm for rheumatoid arthritis: A study protocol for a randomized controlled trial

BACKGROUNDRheumatoid arthritis (RA) is a chronic disease which is characterized by a circadian variation of key clinical symptoms and findings, with prominent joint swelling, stiffness and pain occurring in the early morning and light clinical symptoms during the day. Chrono-moxibustion is carried out at different time, which could result in dissimilar therapeutic effects. However, its efficacy has seldom been systematically demonstrated and few studies have reported that Chrono-moxibustion may regulate the circadian rhythm of RA. We therefore designed a randomized trial to explore the effective difference of Chrono-moxibustion in RA treatment, as well as to study its influence on circadian rhythm of RA patients. METHODSThis study is a randomized controlled trial involving 120 participants, and a total of 90 eligible RA patients will be randomly allocated to three groups in a 1:1:1 ratio as moxibustion at 7 to 9 am, moxibustion at 5 to 7 pm, and waiting list group, meanwhile, 30 healthy people will be divided into the control group. Patients in moxibustion groups will be treated for 30 minutes per session, 3 times a week, lasting 6 weeks. All of RA patients will be evaluated with questionnaires and laboratory tests before treatment, as well as 3 weeks, 6 weeks, and 3 months after treatment. One way analysis of variance (ANOVA) with multiple comparisons will be applied to identify differences more than two groups. Halberg cosiner software will be used to analysis the circadian rhythm. RESULTSThe results of this study will be published in a peer-reviewed journal. CONCLUSIONThis study will provide evidence-based evidence for the effective difference of Chrono-moxibustion in RA treatment and its influence on circadian rhythm of RA patients.