The other message in the IOM report is hot and shrill. It shouts about death and disability in US hospitals: "Preventable adverse events are a leading cause of death" and "at least 44,000, and perhaps as many as 98,000, Americans die in hospitals each year as a result of medical errors." The unstated corollary—reinforced by the death rate from motor vehicle collisions juxtaposed with the death rate from adverse events—is that eliminating preventable adverse events also will eliminate the deaths.
Motor vehicle occupants do survive their ride if collisions are avoided. Unlike most people who step into motor vehicles, most patients admitted to hospitals have high disease burdens and high death risks even before they enter the hospital. Although some hospital deaths are preventable, most will occur no matter how many "accidents" we avoid. Of course, medical errors are never excusable, but the baseline death risk has to be known and factored out before drawing conclusions about the real effect of adverse reactions on death rates, preventable or otherwise