Complex sentence: The three domains that are included when considering underinsurance in healthcare; (1) the economic characteristics of health insurance, (2) the benefits that are or are not covered, and (3) actual access to health services and resources.
Split into simpler sentences: The three domains that are included when considering underinsurance in healthcare. They include; (1) the economic characteristics of health insurance, (2) the benefits that are or are not covered, and (3) actual access to health services and resources.