Strand AK, et al. - In this 20-year, retrospective, case-control study, researchers assessed 457 patients from a dementia registry and 420 dementia-free controls to quantify the correlation between anesthesia and dementia. Upon analysis, they found that advanced age (≥ 70 years) and prior head trauma were risk factors for dementia. History of exposure to surgery with anesthesia was also calculated as a risk factor for dementia. A correlation between exposure to general anesthetics with halogenated anesthetic gases and a greater dementia risk was also reported.