# Early-Onset Alzheimer's Linked to Distinct Pre-Diagnosis Symptoms New research reveals depression and dizziness precede early-onset Alzheimer's, unlike traditional cardiovascular risk factors. - **Source:** [Earth.com](https://www.earth.com) - **Published:** 2026-11-10 - **Topic:** [health](https://brifing.si/c/health) - **Original article:** - **On Brifing:** https://brifing.si/s/a630da73-388b-4077-8e71-25136f39c0ca ## Distinct Symptom Patterns Identified Researchers in Finland discovered that early-onset Alzheimer's disease presents differently than late-onset cases. While cardiovascular issues like high blood pressure are common markers for older patients, they do not correlate with early-onset cases. Instead, patients under 65 frequently experience a unique cluster of neurological and psychological symptoms years before receiving a formal diagnosis. ## Pre-Diagnosis Health Indicators In the five years preceding a diagnosis, future patients showed higher rates of dizziness, depression, and headaches. Other recorded conditions included brain injuries, epilepsy, and delirium. These symptoms, while individually uncommon, appeared significantly more often in the patient group compared to a matched control group of 4,035 healthy individuals from the same regions. ## Cardiovascular Factors Not Predictive The study found no significant link between early-onset Alzheimer's and traditional heart-related risks. High blood pressure and high cholesterol levels were recorded in 10.6% of future patients, compared to 9.3% in the control group. This statistical gap was too narrow to be considered meaningful, suggesting distinct underlying biological mechanisms for younger-onset disease. ## Diagnostic Delays and Challenges Early-onset Alzheimer's is notoriously difficult to diagnose, with an average delay of 42 months after initial symptoms appear. This is significantly longer than the 31-month average for late-onset cases. The study utilized data from memory clinics at Oulu and Kuopio university hospitals to track these diagnostic patterns across a decade of patient records. ## Increased Healthcare Utilization Healthcare encounters for future patients spiked significantly as the diagnosis date approached. In the final year before diagnosis, these individuals averaged 3.3 care episodes, compared to 1.9 for the control group. By the year of diagnosis, this figure rose to 6.3 visits, highlighting a clear increase in medical system engagement during the pre-diagnostic phase. ## Interpreting the Clinical Data The researchers caution that the study cannot determine if these conditions cause Alzheimer's or are early symptoms of brain changes. Conditions like depression or delirium might be manifestations of the disease already in progress. The study design, based on retrospective health records, limits the ability to establish a direct causal link between these events. ## Limitations of the Study The analysis relied on Finnish national health records, which lack data on lifestyle, genetics, or socioeconomic status. Furthermore, the study only included patients who survived through each observation stretch. Because the research is limited to one country's health system, the authors emphasize that these findings require validation through larger, more diverse international datasets. ## Future Diagnostic Implications Recognizing the pattern of seemingly unrelated symptoms could facilitate earlier detection of neurodegenerative diseases. While no single symptom predicts Alzheimer's, the accumulation of these specific health encounters serves as a potential warning sign. This research underscores the need for clinicians to look beyond standard cardiovascular risk factors when evaluating younger patients. ## Sources covering this story - https://www.earth.com/lifestyle/people-with-early-onset-alzheimers-often-face-depression-and-dizziness-before-their-diagnosis-but-not-high-blood-pressure/ — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._