Final answer:
The revision of the quality of care definition by the Institute of Medicine excludes personal health choices and behaviors, focusing instead on healthcare system influences on health outcomes like life expectancy.
Step-by-step explanation:
The Institute of Medicine (IOM) revised its definition of quality of care to focus more on healthcare delivery systems and measurable health outcomes, rather than on factors that are difficult to control or measure such as personal health choices and behaviors. It is challenging to ascertain whether a health outcome, like life expectancy, is due to individual life choices like diet, exercise, and risky behaviors, or the result of healthcare interventions such as annual check-ups. Therefore, the revision aimed to concentrate on aspects of quality of care that are directly influenced by the healthcare system, excluding components like personal preferences which can significantly affect health and longevity but are not directly related to the healthcare provided.