According to the IOM definition, health services research examines which dimensions to increase knowledge about health services?

• A. Use, cost, quality, access, delivery, organization, finance, and outcomes
• B. Genetic predisposition and heredity
• C. Pharmacokinetics and pharmacodynamics
• D. Meteorological factors affecting health

Answer: (A)

Health services research aims to understand how care is used, paid for, delivered, organized, and what results it produces, so we can improve the health care system. The IOM defines this field around eight interrelated dimensions: use of health services, costs, quality, access, delivery, organization, financing, and outcomes. Focusing on these areas helps researchers evaluate value, identify gaps, and design improvements that enhance patient experiences and health results. For example, studying access and delivery reveals barriers to receiving care, while looking at quality and outcomes shows whether care actually improves health. The other topics listed—genetic predisposition and heredity, pharmacokinetics and pharmacodynamics, and meteorological factors—are about biology or environmental influences, not how health services are used or organized, so they don’t fit the IOM definition of health services research.