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Geriatrician Nathaniel Chin argues that persistent subjective cognitive decline can be a reason to establish a thorough cognitive baseline and monitor changes, even when testing falls within the normal range. He stresses that the experience alone does not mean someone has Alzheimer’s and that other health and lifestyle factors can affect thinking.
Geriatrician Nathaniel Chin says persistent concerns about memory or thinking should not automatically be dismissed when cognitive test results are normal, arguing that a careful baseline and follow-up can help identify changes before they meet criteria for measurable impairment. In an October 27, 2026, article for Being Patient, he also emphasizes that subjective cognitive decline is not an Alzheimer’s diagnosis and can have many causes.
Subjective cognitive decline (SCD) describes a person’s continuing sense that their cognitive abilities have fallen from an earlier level, despite testing that does not show objective impairment. Chin, a memory-care physician at UW Health and an associate professor at the University of Wisconsin–Madison, says a normal score does not necessarily mean there has been no change: standard assessments often compare people with others of similar age, rather than with their own previous abilities.
He distinguishes a short screening from a comprehensive cognitive evaluation. Screenings commonly take five to 15 minutes and sample a limited set of abilities. A fuller evaluation generally takes an hour or more and examines memory, language, attention, planning and other functions. Chin says that depth matters when clinicians are trying to determine whether someone has SCD or whether impairment is already measurable.
Chin recommends that clinicians take persistent concerns seriously by establishing a detailed baseline, looking for other possible contributors and, when appropriate, seeking observations from someone who knows the person well. Repeated testing can help show whether abilities are stable or changing over time. He cites “SCD plus,” a set of features proposed by psychiatrist Frank Jessen and colleagues, including memory-focused concerns, recent onset, onset at age 60 or older, worry, persistence, seeking medical help and confirmation by another person. These features may raise concern but do not prove Alzheimer’s disease.
Why Normal Scores May Not End Follow-Up
The clinical issue Chin raises is a gap between a person’s perceived change and what a single test can detect. A person who previously performed far above average might experience a decline and still score within the average range. That can make comparison with an individual’s own baseline useful, especially if concerns continue across visits.
Taking those concerns seriously does not mean labeling them as Alzheimer’s. It means distinguishing a symptom from its cause and considering whether evaluation or monitoring is appropriate. Chin’s account is a physician’s perspective, not evidence that everyone reporting forgetfulness will progress to dementia. The practical implication is a more measured response than either assuming disease or dismissing ongoing concerns based on one normal result.
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How Clinicians Define Subjective Decline
SCD is a description of a reported change in cognition when objective testing does not establish impairment; it does not explain why the change is happening. Chin lists potential contributors including sleep problems, medications, depression or anxiety, medical illness, vascular disease, hearing loss, stress and normal aging. Identifying such factors is part of evaluating a concern rather than presuming Alzheimer’s.
The “SCD plus” features are intended to help identify patterns that may merit closer attention. Chin contrasts longstanding, intermittent word-finding concerns linked to stress or poor sleep with a more recent, persistent memory change that worries the person and is also noticed by a spouse. Both people might test within normal limits, he says, but their histories would prompt different clinical questions. No single feature establishes the cause, and the combination is a reason for closer attention, not a diagnosis.
What SCD Cannot Establish
SCD alone cannot show that Alzheimer’s disease is present, and the features grouped under SCD plus do not prove it either. The source article names sleep, mental health, medications and other medical or sensory factors as possible explanations, but the excerpt does not establish how often each factor accounts for reported decline or how reliably any SCD-plus pattern predicts future disease.
Chin raises whether biomarkers can detect Alzheimer’s-related biological changes before cognitive impairment and mentions blood tests, cerebrospinal fluid testing and amyloid PET. The supplied article text ends before explaining which patients might be considered, what results can establish, or how testing should guide care. It also provides no study data or estimates of progression risk. Those questions cannot be answered from the available material.
Baseline Testing and Follow-Up
For patients with persistent concerns, Chin’s proposed next steps are to document cognitive abilities in depth, check for other contributors, gather observations from a trusted person when possible and repeat assessments over time. The aim is to see whether a pattern of change emerges, rather than treating one normal test as the final word or treating a subjective concern as proof of disease.
The article’s supplied excerpt does not report a new trial, guideline or policy change, and it does not describe a specific next milestone for biomarker testing. It remains unclear from that text how the author would select patients for those tests or what findings would change management. Readers concerned about memory changes should discuss them with a qualified health professional, who can consider their history and decide whether evaluation is appropriate.
Key Questions
Does subjective cognitive decline mean someone has Alzheimer’s?
No. SCD describes a person’s perceived decline when testing does not show objective impairment. It does not identify the cause, and Chin notes that several health and lifestyle factors can affect thinking.
Can a normal cognitive test miss a meaningful change?
It can fail to capture a decline from a person’s own earlier abilities, Chin says, because tests often compare a person with others of similar age. A normal result is not, by itself, proof that a reported change has not occurred.
What does “SCD plus” mean?
It refers to features that may make subjective decline more concerning, such as recent, persistent memory concerns, worry, seeking medical help and another person noticing the change. These features do not diagnose Alzheimer’s.
What follow-up does Chin describe?
He favors a thorough cognitive baseline, consideration of other possible contributors, input from someone familiar with the person’s abilities when available, and repeat testing over time. The appropriate evaluation depends on the individual and should be discussed with a qualified health professional.
Source: beingpatient.com
