The Centers for Disease Control and Prevention estimates 8,000-15,000 people per year in the United States are examined or treated in hospitals for carbon monoxide (CO) poisoning, commonly the result of faulty or ill-maintained gas burning appliance in the home. A new study indicates that patients treated for CO poisoning are 1.6 times more likely to develop dementia later in life, with an even greater risk for cases of more severe CO poisoning. Medicine, January 2016