Maryam Ghahremani, University of Calgary and Zahinoor Ismail, University of Calgary

For many older adults, life is full of routines. Making breakfast, paying bills, shopping, driving, managing appointments and keeping track of medications are tasks done almost automatically. For most, these routines run smoothly, but for some, small disruptions begin to creep in.

These small struggles matter. Perhaps it starts with uncharacteristically forgetting to add an item to the grocery list or misplacing a pair of glasses. Maybe a chequebook gets mismanaged, or a favourite recipe becomes harder to follow.

These moments can be brushed off as part of aging or blamed on a busy mind. Yet, when these new difficulties persist over time, they may be more than just minor frustrations; they might be early signs of something far deeper.

Daily functioning is a key measure of independence, reflecting not only memory, but the co-ordination, planning and attention required to navigate everyday life. Changes here are often subtle, and they can go unnoticed by family members or health-care providers.

Clinicians have long recognized that loss of functional independence, like difficulty performing everyday activities, is a hallmark of dementia. It is, in fact, part of the formal diagnostic criteria for dementia.

What is less widely appreciated is that these functional changes can emerge years before dementia is diagnosed, providing an early signal that the brain may be at risk. Even when memory seems intact, persistent new struggles in daily tasks may indicate that cognitive decline is starting quietly.

Recent studies tracking older adults without dementia have found that those who experience persistent difficulties in activities of daily living (like preparing meals, shopping or driving) face a higher risk of developing Alzheimer’s disease in the years ahead. In addition, these persistent impairments are linked to biological markers of the disease, detectable in spinal fluid long before memory loss becomes obvious. By contrast, temporary or occasional difficulties do not carry the same risk.

One of the key insights in this new research is the difference between temporary lapses and persistent functional changes. While almost everyone misplaces keys or forgets a name from time to time, chronic struggles that linger or worsen over months and years may reveal early disruptions in the brain’s ability to co-ordinate complex tasks.

These disruptions can be one of the earliest indicators that cognitive decline is on the horizon, even before conventional cognitive tests can detect it.

Families, especially those who live with or spend time daily with an older adult, are often the first to notice subtle but steady changes in function, like moments when their loved one struggles to follow a familiar schedule, double-checks every step in a process that used to be second nature or avoids tasks that were once routine. Recognizing these patterns early can help families seek timely evaluation, support and planning.

These findings also underscore the value of integrating functional assessments into routine health care. Traditionally, cognitive screening has focused on memory, attention or language tests. More recently, including assessments of changes in behaviour or neuropsychiatric symptoms have been included in dementia guidelines, even at screening of cognitively unimpaired older persons.

Measuring the ability to manage daily life may provide a window into brain health that is both a practical and potentially more culturally adaptable approach to early detection than cognitive screening. Standard cognitive screening tests can be affected by language, education or cultural background. For example, someone may score lower simply because the test uses unfamiliar words, assumes certain schooling or reflects cultural norms that differ from their own.

In contrast, observing changes in everyday function over time focuses on real-life abilities and can reveal early signs of brain changes, offering a practical and widely applicable way to detect risk.

The story of everyday struggles as early warning signs challenges common perceptions of aging. What looks like normal forgetfulness may, in some cases, be a signal to pay closer attention. These subtle changes are not personal failures — they are clues, pointing to the need for care, support and awareness.

It’s also important to keep this in balance: not every struggle points to dementia, and many older adults maintain their independence without experiencing any decline in daily functioning. But for those whose difficulties persist and accumulate, the pattern is meaningful.

Based on the latest research, it is this persistence, rather than occasional slips, that is most strongly linked to future cognitive decline and brain changes associated with Alzheimer’s disease.

By shifting the focus from episodic forgetfulness to ongoing functional changes, families and health-care providers can act sooner. Support strategies, such as simplifying routines, using reminders or providing assistance with complex tasks, can help maintain independence while also serving as a form of early intervention. Early recognition also allows for better planning, access to resources and timely medical evaluation.

Ultimately, the story of functional change in aging is one of vigilance and insight. Paying attention to what may seem like small, everyday difficulties can offer a glimpse into the brain’s health years before memory loss becomes obvious. It’s a reminder that the subtle ways life becomes harder can carry vital information, and that early attention to persistent changes may make a meaningful difference in the course of aging and cognitive health.

If you’re interested in contributing to research on everyday function and brain health, Canadian studies like CAN-PROTECT and BAMBI are exploring how subtle changes in daily life may signal early risk for Alzheimer’s.

Both studies are led by Dr. Zahinoor Ismail, a clinician scientist at the University of Calgary and one of the authors of this story. BAMBI is based in Calgary, while CAN-PROTECT is an online study open to participants across Canada. By joining such studies, you can help advance research that could make a real difference.

This article is republished from The Conversation under a Creative Commons license. Read the original article.

(The Conversation/HG)