Using the electronic medical records of 305 339 adults aged between 21 and 90 years, researchers at Pennsylvania State University College of Medicine examined the association between IDA and sensorineural hearing loss (when there is damage to the cochlea or to the nerve pathways from the inner ear to the brain) and conductive hearing loss (hearing loss because of problems with the bones of the middle ear). IDA was determined by low haemoglobin and ferritin levels for age and sex.
Is the amyloid cascade hypothesis of Alzheimer’s disease too big to fail? It proposes that brain deposition of β amyloid protein is the critical early event in the pathogenesis of Alzheimer’s disease and has been the centrepiece of dementia research for decades. The hypothesis suggests that removing β amyloid will reverse or prevent the clinical expression of dementia. However, in all phase III clinical trials to date, treatments targeting β amyloid have failed to improve cognitive outcomes despite reducing brain β amyloid.