People diagnosed with early-onset Alzheimer's disease (EOAD) show a distinct cluster of conditions — including depression, vertigo, and stroke — in the 1–5 years before diagnosis, a new Finnish study reveals. Healthcare visits also spike sharply in the year leading up to diagnosis. These patterns could be key to catching the disease earlier.
A new population-based study out of Finland found that people who go on to develop early-onset Alzheimer's disease (EOAD) — diagnosed between ages 60 and 65 — show a recognizable pattern of health issues years before the diagnosis is made. Conditions like depression, vertigo, headache, delirium, stroke, epilepsy, and thyroid disorders were all significantly more common in EOAD patients during the 1–5 years before diagnosis compared to matched controls.
Interestingly, traditional cardiovascular risk factors like hypertension and high cholesterol did not differ between the groups — suggesting EOAD's prediagnostic fingerprint is distinct from typical dementia risk profiles. The signal also narrowed over time: beyond 5 years before diagnosis, most differences disappeared, pointing to a relatively concentrated pre-diagnostic window.
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Why it matters: Recognizing this comorbidity cluster could help clinicians flag at-risk patients earlier, potentially opening a window for earlier intervention and better outcomes.
