A multiverse analysis of meta-analyses assessing acupuncture efficacy for smoking cessation evidenced vibration of effects.

Objective: To explore the impact of methodological choices on the results of meta-analyses (MAs), with acupuncture for smoking cessation as a case study.

Study Design And Setting: After performing an umbrella review (using MEDLINE, the COCHRANE Library, the Wan Fang database, and the Chinese Journal Full-text Database/March 2018) of MAs exploring the use of acupuncture for smoking cessation, we extracted all randomized controlled trials. Numerous MAs were performed as per every possible combination of various methodological choices (e.