Personal Health Services: Health care provided to individuals.Health Records, Personal: Longitudinal patient-maintained records of individual health history and tools that allow individual control of access.Patient Access to Records: The freedom of patients to review their own medical, genetic, or other health-related records.Health Services: Services for the diagnosis and treatment of disease and the maintenance of health.Health Services Accessibility: The degree to which individuals are inhibited or facilitated in their ability to gain entry to and to receive care and services from the health care system. Factors influencing this ability include geographic, architectural, transportational, and financial considerations, among others.Mental Health Services: Organized services to provide mental health care.Confidentiality: The privacy of information and its protection against unauthorized disclosure.Computer Security: Protective measures against unauthorized access to or interference with computer operating systems, telecommunications, or data structures, especially the modification, deletion, destruction, or release of data in computers. It includes methods of forestalling interference by computer viruses or so-called computer hackers aiming to compromise stored data.Health Services Needs and Demand: Health services required by a population or community as well as the health services that the population or community is able and willing to pay for.Electronic Health Records: Media that facilitate transportability of pertinent information concerning patient's illness across varied providers and geographic locations. Some versions include direct linkages to online consumer health information that is relevant to the health conditions and treatments related to a specific patient.Delivery of Health Care: The concept concerned with all aspects of providing and distributing health services to a patient population.Health Services Research: The integration of epidemiologic, sociological, economic, and other analytic sciences in the study of health services. Health services research is usually concerned with relationships between need, demand, supply, use, and outcome of health services. The aim of the research is evaluation, particularly in terms of structure, process, output, and outcome. (From Last, Dictionary of Epidemiology, 2d ed)Health Status: The level of health of the individual, group, or population as subjectively assessed by the individual or by more objective measures.Medical Records Systems, Computerized: Computer-based systems for input, storage, display, retrieval, and printing of information contained in a patient's medical record.Access to Information: Individual's rights to obtain and use information collected or generated by others.