Functional Decline Precedes Cardiovascular Disease Events By Many Years

TL;DR

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A JAMA Cardiology study found that participants who later had cardiovascular events showed worse frailty, intrinsic capacity and physical health-related quality of life up to a decade beforehand. Differences widened in the five years before an event, but the study does not establish that functional decline causes cardiovascular disease or that screening based on these measures prevents events.

A study of 12,015 participants found that people who later experienced cardiovascular disease events had worse measures of frailty, physical capacity and physical health-related quality of life as far as a decade before the event. Published online Sept. 23 in JAMA Cardiology, the findings point to a long-term association between functional decline and later cardiovascular events, but do not show that the decline causes disease or that measuring it can prevent an event.

Aung Zaw Zaw Phyo of Monash University in Melbourne and colleagues analyzed data from the Aspirin in Reducing Events in the Elderly cohort. The analysis compared 2,403 participants who had a cardiovascular event with 9,612 matched controls. Researchers examined how functional performance measures changed in the years before the event.

Compared with controls, participants who later had an event had consistently higher frailty and lower intrinsic capacity and physical health-related quality of life. The gap widened markedly during the five years before an event. Over time, the event group also showed faster worsening in two frailty measures and steeper declines in intrinsic capacity and physical health-related quality of life.

The authors reported similar broad patterns across the cardiovascular outcomes included in the analysis, with a timing difference: divergence appeared at least 10 years beforehand for heart failure and fatal coronary heart disease, while patterns for myocardial infarction and stroke were different. The study was a nested case-control analysis, not a trial testing a screening program or an intervention.

A Longer Window for Clinical Attention

The findings suggest that cardiovascular events may be preceded by changes in several aspects of function, rather than appearing against a background of stable health. For clinicians, tracking frailty, physical capacity and quality of life over time could provide information to consider alongside established cardiovascular risk factors. The study authors describe the period before an event as a potential window for closer evaluation and early intervention.

That possibility is not the same as evidence that functional measures can predict an individual person’s event with clinical accuracy, or that acting on them will reduce risk. The results describe differences between groups across years; they do not establish a cause-and-effect relationship. Readers should not interpret functional decline alone as a diagnosis of cardiovascular disease. Decisions about symptoms, testing and prevention should be discussed with a qualified health professional.

How Researchers Tracked Aging

The report, published online Sept. 23, is titled Multidimensional Aging Trajectories Preceding Cardiovascular Events and appeared in JAMA Cardiology. It draws on the ASPREE cohort, whose name refers to the Aspirin in Reducing Events in the Elderly study. Researchers used matched controls to compare people who experienced a cardiovascular event with participants who did not have a corresponding event in the analysis.

The study examined more than one dimension of functional aging: frailty, intrinsic capacity and physical health-related quality of life. Those measures capture different aspects of a person’s health and functioning. The researchers followed their trajectories before events rather than testing whether a particular measure, threshold or clinical program could identify and avert a future event.

“Declines in functional aging markers were prominent before clinically apparent CVD.”

— Aung Zaw Zaw Phyo and colleagues, in the study

Prediction and Prevention Remain Untested

The analysis does not establish why functional measures worsened before events, whether the changes directly reflect cardiovascular disease, or whether they result from broader aging and other health conditions. It also does not show whether monitoring these measures can accurately predict which individual will have an event.

The report does not test a specific screening threshold, clinical response or preventive treatment. It therefore cannot establish whether earlier evaluation based on functional decline would prevent heart failure, coronary events, heart attacks or strokes. The source material also does not provide detailed participant demographics or enough information to determine how well the findings apply to populations beyond this cohort of older adults.

Clinical Studies Must Test the Approach

The study presents observational findings; it does not announce a clinical program or a planned next trial. A next step for research would be to test whether repeated functional assessments add useful predictive information beyond existing risk measures, and whether acting on those assessments improves patient outcomes. Until such evidence is available, the reported results support further investigation rather than a change in screening practice.

Key Questions

What did the study find?

Participants who later experienced cardiovascular events had worse frailty, intrinsic capacity and physical health-related quality of life than matched controls, with differences visible up to a decade before events and widening nearer the event.

Does the study show that functional decline causes heart disease?

No. The study found an association in an observational analysis. It did not establish that functional decline causes cardiovascular disease or identify the mechanism behind the pattern.

Which events were included?

The report describes a cardiovascular disease composite and discusses heart failure, fatal coronary heart disease, myocardial infarction and stroke. It reports that the timing of divergence differed for heart failure and fatal coronary heart disease compared with heart attack and stroke.

Does this mean functional assessments can prevent cardiovascular events?

That has not been shown. The researchers did not test a screening strategy or intervention. Whether monitoring functional measures improves prediction or prevents events remains unknown.

Source: rss