Crosswalk Algorithms for Cognitive and Functional Outcomes Among 2013-2018 Medicare Beneficiaries With Dementia.
Kevin T Pritchard, Mufaddal Mahesri, Qiaoxi Chen and 4 others
PMID 39067864WHAT IT FOUND
Home health admission scores often disagree with nursing facility discharge scores for patients with dementia.
Cognitive impairment can be ruled out reliably using specific OASIS items, but ADL limitations are over-identified, making cross-setting comparisons unreliable.
Key findings
01For moderate-to-severe cognitive impairment, the OASIS Cognition 1 algorithm had 94% specificity and 75% positive predictive value, making it useful for ruling out impairment.
02OASIS algorithms for ADL limitations had low specificity (5% to 27%) compared to MDS reference standards, meaning they frequently identified limitations that were not present on the nursing facility assessment.
03There was a notable decline in ADL independence from MDS discharge to OASIS admission, likely due to differences in assessment timing, observer, and scoring instructions rather than true patient change.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTsWhat it means for SLPsWhat it means for RNs
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What it does not show
The study population was older, had fewer Hispanic Americans, and had more healthcare utilization than the general Medicare dementia population, limiting generalizability. The analysis compared pre-2019 OASIS measures to MDS measures; it could not evaluate the newer uniform Section GG measures because they were not required in home health until 2019. The discrepancy in ADL scores may reflect true functional decline due to the transition between settings, but the study design cannot definitively separate assessment bias from actual change.
Declared interests
The study was supported by the National Institute on Aging. The authors did not report any personal financial conflicts of interest.
The easy way to misread this
Do not interpret the high sensitivity of OASIS ADL algorithms as evidence that they accurately identify functional limitations compared to nursing facility assessments. The low specificity (5% to 27%) means OASIS frequently over-identifies limitations relative to the MDS reference, likely due to differences in scoring instructions and observer context.