Evidence mapping of Emotional Freedom Techniques for post-traumatic stress disorder: a systematic review

Emotional Freedom Techniques (EFT) have been investigated as a psychological intervention for post-traumatic stress disorder (PTSD); however, the characteristics, distribution, and methodological quality of the available evidence have not been systematically mapped. This study systematically mapped the clinical evidence on EFT for PTSD by integrating findings from primary studies and systematic reviews with meta-analysis. A systematic evidence mapping review was conducted in accordance with PRISMA 2020. PubMed, Embase, Cochrane Library, Scopus, and Web of Science were searched from inception to March 20, 2026. Eligible records included primary clinical studies and systematic reviews with meta-analysis evaluating EFT in participants with clinically significant PTSD symptoms. Study characteristics, methodological quality, and findings were synthesized descriptively by study design, comparator, population, and outcome. Overlap across systematic reviews was quantified using the Corrected Covered Area (CCA). The protocol was registered in PROSPERO (CRD420261380106). Fourteen studies were included, comprising 11 primary studies and 3 systematic reviews with meta-analysis. Primary studies included six randomized controlled trials, two non-randomized comparative studies, and three uncontrolled before–after studies across veteran, community, and trauma-exposed clinical populations. EFT protocols generally consisted of 4–10 sessions. Randomized trials consistently favored EFT over passive controls, whereas five studies directly compared EFT with active trauma-focused therapies (EMDR, CBT, or narrative exposure therapy), with most reporting no statistically significant differences between treatment groups. Non-randomized and uncontrolled studies generally reported improvements following EFT but provided limited evidence for causal inference. The included systematic reviews with meta-analysis consistently reported favorable effects of EFT, particularly compared with passive controls; however, review overlap was very high (CCA = 0.46), indicating substantial redundancy of the underlying primary evidence. Risk of bias ranged from some concerns to high among randomized trials, moderate among non-randomized studies, and fair among uncontrolled studies. The methodological quality of the systematic reviews was rated as critically low to low using AMSTAR 2. This evidence mapping review demonstrates that the literature on EFT for PTSD consists of a small but growing body of evidence, with research concentrated in randomized trials and systematic reviews with meta-analysis but limited independent replication and substantial overlap across reviews. Although EFT showed favorable findings, particularly compared with passive controls, the comparative effectiveness of EFT relative to established trauma-focused therapies remains uncertain. Future research should prioritize adequately powered, methodologically rigorous comparative trials to strengthen the evidence base. Not applicable.