Acupuncture for patients with mild cognitive impairment: a randomized, patient-assessor-blinded, sham-controlled pilot study.

Background: Mild cognitive impairment (MCI) is the transitional stage between normal aging and early dementia. Although acupuncture is a promising non-pharmacological treatment, higher-quality evidence is needed to confirm its effectiveness.

Methods: A randomized, patient- and assessor-blinded, sham-controlled, pilot clinical trial was conducted to evaluate the feasibility of acupuncture for treating MCI. In total, 30 participants were randomized into acupuncture and sham acupuncture groups. The participants underwent 24 treatment sessions over 12 weeks. The primary outcome was a change in the Alzheimer's Disease Assessment Scale-Cognitive Subscale (ADAS-cog) score over 12 weeks, whereas the secondary outcomes included the Seoul Neuropsychological Screening Battery (SNSB-II) score. Adverse events and the success of blinding were also assessed.

Results: Of the 30 participants, 28 completed the study. Participants in the acupuncture and sham acupuncture groups exhibited a decrease in ADAS-cog scores from 10.27 ± 4.03 and 11.47 ± 3.85 at baseline to 5.78 ± 3.04 and 6.27 ± 2.83 at week 12, respectively. Both groups exhibited clinically meaningful improvements, with no significant difference between groups (P = 0.6590). The SNSB-II memory domain exhibited a moderate effect size favoring acupuncture (Cohen's d = 0.57, P = 0.1317). No intervention-related adverse events were reported, and participant blinding was adequate throughout the trial.

Conclusions: The 12-week acupuncture treatment is feasible for patients with MCI and may improve memory. Although the primary outcomes did not reach statistical significance, the secondary outcomes suggested potential benefits. Larger confirmatory trials are warranted to investigate the effectiveness of acupuncture in patients with MCI.

Trial registration: Clinical Research Information Service (cris.nih.go.kr) KCT0001938 (Registered on June 3, 2016).