Much of the information on which treatment decisions are based in elde
rly patients is derived from studies involving younger adults. The ben
efit to risk ratio of any given intervention may be quite different in
frail older patients with significant comorbidities, and the applicab
ility of such study findings to routine geriatric medical practice is
therefore limited. The recruitment of significant numbers of elderly p
atients into trials is necessary to enable clinicians to make informed
and rational therapeutic decisions in this expanding population.