Control subjects were recruited over the same period as the men presenting with hip fracture to avoid seasonal variation in vitamin D concentrations. We attempted to recruit the same numbers of inpatient and outpatient control subjects as men presenting with hip fracture.
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.