Finnish researchers identify early conditions preceding early-onset Alzheimer's disease

Researchers from Finland analyzed nationwide health registers to evaluate conditions documented years before a diagnosis of early-onset Alzheimer's disease, according to lomazoma.com. The study, published in the journal Alzheimer’s & Dementia, evaluated medical records from 407 Alzheimer's patients who had an average age of nearly 61 years at diagnosis, comparing them with 4,035 age- and sex-matched control subjects lomazoma.comlomazoma.comlomazoma.comOpen source ↗. The authors examined diagnoses across several time intervals preceding the formal detection of the disease.

Symptoms documented five years prior

In the five years immediately preceding diagnosis, specific clinical complaints occurred significantly more often in the patient group than in controls lomazoma.comlomazoma.comlomazoma.comOpen source ↗. Dizziness was recorded in 5.9 percent of future patients compared to 2.1 percent of controls, while depression appeared in 5.7 percent versus 2.3 percent. Headaches were documented in 4.9 percent of patients compared to 1.6 percent of controls, and thyroid disorders were recorded in 2.5 percent compared to 0.8 percent. The authors also noted higher frequencies of strokes, epilepsy, and certain brain injuries during this period, alongside an increase in physician and hospital visits during the final year before diagnosis.

Ear conditions and cardiovascular findings

Ear, nose, and throat issues appeared six to ten years prior to the Alzheimer's diagnosis lomazoma.comlomazoma.comlomazoma.comOpen source ↗. Diagnoses of tinnitus and bilateral sensorineural hearing loss were documented in 4.7 percent of subsequent patients compared to 2.1 percent of controls. Records dating eleven to fifteen years before diagnosis showed no statistically clear differences between the cohorts. The study did not find a significant difference in documented hypertension or elevated blood lipids between the groups, contrasting with the cardiovascular risk factors commonly seen in older cohorts. The authors noted these findings reflect retrospective correlations rather than individual predictive markers.