An alarming number of additional Alzheimer’s disease (AD) deaths have been reported across various states within the past several months, according to the Alzheimer’s Association. Centers for Disease Control and Prevention data indicate that no less than 31,000 additional people with the neurodegenerative condition had died from the beginning of the pandemic through the end of September 2020. We know that long-term care facilities have been hit hardest, and access to adequate and/or prompt testing has been cited as the most pressing issue during the onset of the pandemic.1
Dr. Faisal Islam
When ADLs become a matter of survival
For individuals affected with Alzheimer’s disease and other types of dementia, performing routine tasks may seem cumbersome and overwhelming. Many of these patients are dependent upon caregivers and family support to facilitate their activities of daily living (ADLs).
Transitioning into the “new normal” set by the pandemic milieu is not an easy task for the average AD individual, because they are now expected to comply with numerous safety instructions (for example, maintaining hygiene, social distancing, etc.). They are also expected to monitor and communicate information about the onset of any suspected symptom to their caregiver or health care clinician.
The additional tasks added to their list of ADLs are particularly distressing given their already compromised short-term memory and overall cognitive decline. Individuals with AD may also be dealing with a host of psychobehavioral challenges, such as the presence of depression, anxiety, and/or agitation amid self-isolation. Enforced social isolation tied to COVID-19 may compound those issues.
Resource diversion and mitigation strategies
Unfortunately, any disruption in services within a long-term care setting may lead to a suboptimal therapeutic environment for patients. The Washington State LTC, for example, reported experiencing a case fatality rate (CFR) exceeding more than a third of its residents; essential staff and health care clinicians were duly affected from exposure to the virus (the risk of transmission increases considerably during transport between facilities). Access to personal protective equipment (PPE) might have been hindered by availability.
Dr. Ranbir Dhillon
Another issue with far-reaching consequences is diversion of resources for urgent care. Health care professionals may simply not be readily available for those with chronic care needs because of the enormous scale of the impact of COVID-19 upon health care systems.
Continuity of therapy might include evaluations or follow-up services via teleconferencing modalities, but an exhaustive initial onsite physical examination is often necessary for accurate diagnostics and care. Medication management for the newly diagnosed AD or dementia patient necessitates a thorough screening process involving appropriate in-person blood or laboratory work. It is for this reason that clinicians will need to plan ahead by preparing a contingency plan with the corresponding mitigation strategies (for example, telemedicine, proposed solutions to anticipated disruption of services, extended support, and feedback from family members, etc.).2
Resilience and recovery in a retrospective study
A research team from Wuhan Red Cross Hospital in China performed a retrospective cohort study on a sample of patients (n = 42) to determine the severity and prognostic features of COVID-19 pneumonia; 19 AD patients (as per National Institute on Aging/Alzheimer’s Association diagnostic guidelines) were directly compared with 23 age-matched non-AD COVID-19 patients in a similar treatment context.
Dr. Zia Choudhry
The study yielded some rather unexpected findings, namely, AD patients experienced remarkably shorter hospital stays and better appetites, especially with respect to their non-AD counterparts. This is even more puzzling when considering that previous studies indicated that dementia patients with concomitant COVID-19 pneumonia are twice as likely to die as those without neurodegenerative compromise.
Aside from a seemingly inexplicable interest in food, the observable positive changes may be attributable to such factors that are particular to the nursing home – residents have immediate access to health care services, which generally allows for timely diagnosis and care. However, the authors of the study speculate that the pathophysiological response of angiotensin-converting enzyme 2 (ACE2) confers to AD patients a therapeutic advantage as they have reduced expression.3 Despite the notoriously high mortality rates of COVID-19 pneumonia among the elderly population, , which underscores the importance of early diagnosis and intervention.
Genetic and environmental susceptibility
One of the more devastating observations about the ongoing pandemic environment is that a whopping 80% of dying patients committed to a long-term facility also include those with AD; it has been reported that almost half of all patients in nursing homes and related services have the neurodegenerative condition. The grim scenario is brought about by several factors, chief of which is the proximity of shared living arrangements within the context of a residential care setting. It should be noted that patients with AD exhibit comorbid conditions (for example, diabetes, cardiovascular disease, and/or respiratory issues) that immediately put them at high risk for COVID exposure. Interestingly enough, the ApoE4 genotype, which is associated with an increased susceptibility for AD, is also correlated with COVID-19 prognosis and severity. Although exact numbers are difficult to come by, it is of utmost importance for clinicians to evaluate the overall scope of the situation, identify at-risk patients such as individuals with AD and related dementias, and work with caregivers to afford care to patients who need it the most.4
Transcending research design
The elderly population, unsurprisingly, experiences the highest COVID-19 mortality rate because of the presence of multiple risk factors, namely, compromised immunity and difficulties maintaining ADLs, and thereby adhering to safety protocols. As far as Alzheimer’s patients are concerned, numerous hurdles affect the domain of neurodegenerative research.
To safeguard the health and well-being of the participants and caregivers, site sponsors and investigators must explore various communication avenues with the goal of facilitating health education (for example, mitigation strategies, adverse effects monitoring, etc.), as well as implementing contingency plans in the event that a site becomes inaccessible (for example, site closure, traveling regulations, lockdowns, etc.).
Alternatives such as telemedicine present viable solutions for ensuring completion of studies. Given the nature of the pandemic, there is a possibility that a research participant may contract the virus, necessitating a break from the established protocol. It is for this reason that site sponsors and corresponding regulatory bodies are advised to proactively engage in dialogue and transparent communications with respect to ensuing protocol deviations. Institutional Review Boards can expedite the review process by making the necessary changes in a timely manner.5
References
1. Ritchie K. KJZZ. 2020 Nov 16.
2. Brown EE et al. Am J Geriatr Psychiatry. 2020 Jul;28(7):712-21.
3. Li J et al. J Alzheimers Dis. 2020;77(1):67-73.
4. Perry G. J Alzheimers Dis. 2020 Jan 1;76(1):1.
5. Alzheimers Dement. 2020 Apr;16(4):587-8.
Dr. Islam is a medical adviser for the International Maternal and Child Health Foundation, Montreal, and is based in New York. He also is a postdoctoral fellow, psychopharmacologist, and a board-certified medical affairs specialist. Dr. Islam disclosed no relevant financial relationships.
Dr. Dhillon is a staff neurologist at Brigham and Women’s Hospital in Boston. Dr. Dhillon is currently on the speaker bureau/advisory board for Biogen, Bristol Myers Squibb, Genzyme, and Teva Neuroscience.
Dr. Choudhry is the chief scientific officer and head of the department of mental health and clinical research at the International Maternal and Child Health Foundation. He has no disclosures.