|Dataset Full Name||Outcome and Assessment Information Set|
The Outcome and Assessment Information Set (OASIS) is a patient specific, comprehensive assessment tool/database designed to measure the quality of home health services and patient health outcomes. OASIS contains data on all adult (ages 18 years and older) Medicare and Medicaid patients who receive non-maternity skilled health services from Medicare certified home health care agencies. It is completed by home health care personnel (typically an RN) and is specifically designed to measure changes in patient health status between two or more time periods.
OASIS is longitudinal including the patient’s health profile at the beginning of services, with follow-up(s) every 60 days during receipt of services, and at discharge. It includes measures of services utilization, quality improvements, and patient-level risk factors for adverse health outcomes among other topics. The OASIS data contains patient case mix profile reports and patient outcome reports which are used for reimbursement purposes and certification process.
In 2010, a comprehensive version of OASIS (OASIS-C) was implemented to add more information on process of care and clinical interventions. OASIS-C2 is the current version, which accounts for recent changes within the health care system (e.g., to evaluate home health care quality).
|Key Terms||Skilled care, Home Health Agency, Home Health services, Medicare, Medicaid, Quality of care, Therapy|
Department of Health and Human Services (HHS)
Centers for Medicare and Medicaid Services (CMS)
|Health Conditions/Disability Measures|
Alzheimer's/dementia, Anxiety disorders, Body mass index (BMI)/obesity, Cardiovascular conditions, Chronic pain, Depression, Diabetes, Heart attack, ICD-9/10 diagnostic codes, Pulmonary disorders, Stroke
|Disability Measures||Ambulatory disability, Cognitive disability, Communication impairment, Functional limitations (ADLs and/or IADLs), Hearing disability, Independent living disability, Mental health disability, Self-care disability, Special equipment use/assistive technology, Visual disability||Measures/Outcomes of Interest|
|Topics||Socio-demographic, Environmental/living arrangements, Health status, Health service utilization, Medication management, Equipment use, Therapy need, Number of visits, Plan of care/intervention, Functional status (ADL/IADL, ambulation, transfer, dressing, assistance from caregiver, cognitive functioning), Fall risk assessment, Fall prevention, Wound and pressure ulcer management, Urinary incontinence/urinary tract infection, Pain/pain management, Obesity, Unplanned hospital admissions, Emergent care, Inpatient facility admission, Discharge disposition, Hospital admission reason, Nursing home admission reason||Sample|
|Sample Population||Adult (ages 18 years and older) Medicare and Medicaid patients (non-maternity) who receive skilled health services from a licensed Home Health Agency (HHA)|
Adult (ages 18 years and older) non-maternity Medicare and Medicaid patients receiving skilled health services from certified Home Health Agency.
2010: 10,800 Medicare certified home health agencies
2010: 3,446,057 beneficiaries were served
2010: 122,578,603 visits made
|Unit of Observation||Individual|
|Geographic Coverage||United States|
|Geographic specificity||State and Zip Code|
Medicare and Medicaid patients (who receive non-maternity skilled health services from Medicare certified home health care agencies)
|Data Collection Mode||Combination of In-person patient observation and interview|
|Data Collection Frequency||Start of care; Resumption of care following inpatient facility stay; Recertification within the last five days of each 60-day recertification period; Other follow-up during the home health episode of care; Transfer to inpatient facility; Discharge from home care; Death at home||Strengths and Limitations|
|Strengths||Large sample size, both clinical and functional status data. Includes home health care services such as nursing care, physical therapy, occupational therapy, speech-language therapy, and medical-social services. OASIS data can be linked with claims and/or other CMS non-CMS data.|
|Limitations||Does not include vital sign data or home health care reimbursed by payers other than Medicare/Medicaid.||Data Details|
|Data Access||Home Health Outcome and Assessment Information Set is available from RESDAC: https://www.resdac.org/cms-data/request/research-identifiable-files|
|Data Access Requirements||Data Use agreement, No cost|
|Summary Tables/reports||Home Health Compare Database:
|Data Components||NA||Selected papers|
Medicare Payment Advisory Commission (MedPAC), Chapter 9: Home health care services, in Report to the Congress: Medicare payment policy, Medicare Payment Advisory Commission (MedPAC), Editor. March 2013, MedPAC: Washington DC. Pages 186-212. http://www.medpac.gov/docs/default-source/reports/mar17_entirereport.pdf
Tullai-McGuinness, Susan, Madigan, Elizabeth, Fortinsky, Richard (2009). “Validity Testing the Outcomes and Assessment Information Set (OASIS).” Home Health Care Serv Q.; 28(1): 45–57. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3070156/pdf/nihms-282994.pdf
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