Over a 92-day seasonally excessive period of ambient carbon monoxide (CO), chief cardiorespiratory complaints (CRC) of a nontraumatic origin were identified from each of 8,556 patient encounters at the Emergency Room of Colorado General Hospital. Excessive numbers of CRC were seen above a CO level of 5 ppm for the 24-hour mean and 11 ppm for the one hour mean maximum ambient CO (p<0.05 for both). Increasing relative risk was shown by com-
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.