The effectiveness of acupuncture on the sleep quality of elderly with dementia: a within-subjects trial

This pioneering study investigated the efficacy of acupuncture in the treatment of sleep disorders in older adults with dementia, a particularly vulnerable population in which 19-50% of individuals suffer from sleep disruptions. Sleep disorders in people with dementia not only impair patients' well-being but also cause significant stress to caregivers, creating a cycle of negative impact on the quality of life of all involved. The study used a within-subjects design (each participant served as their own control), in which 19 older adults with dementia and subjective complaints of sleep problems went through a 6-week control period followed by 6 weeks of treatment with acupuncture. During the treatment period, participants received 12 sessions of acupuncture (twice a week), each lasting approximately 30 minutes.

The treatment protocol included six specific meridian points: Shenmen (HT-7), Baihui (GV-20), Anmian II (EX-HN-9), Yintang (EX-HN-3), Zusanli (ST-36), and Sanyinjiao (SP-6). These points were selected based on existing literature on acupuncture for sleep promotion and Traditional Chinese Medicine theory. Sleep parameters were measured objectively through wrist actigraphy, which detected participants' movements during the night, providing accurate data on rest time, total sleep time, sleep efficiency, and other relevant indicators. Cognitive function was also assessed through the ADAS-Cog scale.

Results demonstrated statistically significant improvements in rest time and total sleep time during the treatment period compared to the control period. Specifically, participants gained an average of 42 additional minutes of rest time during treatment versus a loss of 45 minutes during control. Similarly, total sleep time increased by an average of 42 minutes during treatment, contrasting with a reduction of 33 minutes in the control period. Although a trend toward improvement in sleep efficiency was observed, this did not reach statistical significance.

The study also demonstrated good acceptability of the intervention, with 86% of participants completing the entire treatment protocol. Only three participants dropped out of the study due to illnesses unrelated to the treatment, and only one participant withdrew due to fear of needles. From a clinical standpoint, these results suggest that acupuncture may represent a viable alternative to traditional sleep medications in older adults with dementia. This is particularly relevant considering that commonly prescribed sedative medications can cause harmful side effects in this population, including excessive daytime sleepiness and motor impairment.

Furthermore, polypharmacy in older adults with dementia is associated with functional decline. The proposed mechanism for the beneficial effects of acupuncture on sleep includes increased melatonin secretion, a hormone crucial for regulation of the sleep-wake cycle, and restoration of yin-yang balance according to Traditional Chinese Medicine theory. Despite the promising results, the study presents important limitations that should be considered in the interpretation of the findings. The relatively small sample size may have limited the statistical power to detect significant differences in some parameters.

The absence of a sham acupuncture control group means that the placebo effect cannot be completely ruled out. Additionally, there was no post-treatment follow-up, leaving questions about the durability of the observed benefits unanswered.