Crosswalk Algorithms for Cognitive and Functional Outcomes Among 2013–2018 Medicare Beneficiaries With Dementia

Before 2019, the Minimum Data Set (MDS) and Outcome and Assessment Information Set (OASIS) had incongruent response categories for rating cognitive impairment and activities of daily living (ADLs), hindering direct comparisons between nursing facilities and home health. We devised rule-based algorithms to compare cognitive impairment and ADL limitations between these 2 care settings among people with Alzheimer's disease and Alzheimer's disease–related dementias (ADRD).