A 4-Item Case-Finding Tool to Detect Dementia in Older Persons.
Tau Ming Liew
PMID 31399363WHAT IT FOUND
A 4-item MoCA-Brief (clock drawing, tap at letter A, orientation, delayed recall) performed as well as full MoCA for detecting dementia in 8,773 older adults.
Key findings
01In the validation sample of 4,387 older adults, MoCA-Brief distinguished dementia from non-dementia with AUC 94.2%, which was not significantly different from MoCA's AUC 93.8% (p=1.000).
02At its optimal cut-off score of less than 10 out of 15, MoCA-Brief had 88.2% sensitivity and 85.9% specificity for dementia.
03Among participants with more than 12 years of education, MoCA-Brief had AUC 94.0% versus MoCA's 94.5%, while other brief tests had AUC values from 87.8% to 93.5%.
STILL TO COME
How it was doneWhat they foundWhat it means for RNs
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What it does not show
Participants were volunteers from Alzheimer's Disease Centers, so they may not represent older adults seen in ordinary primary-care or geriatric clinics. MoCA-Brief was tested only as part of the full MoCA, not administered by itself, so its real-world standalone performance is unknown. Most participants had 16 years of education, so the tool may behave differently in people with less education, although results were stratified by education. Comparisons with the Memory Impairment Screen, Mini-Cog and GPCOG used scores approximated from MoCA items, so those comparisons are exploratory. 17.4% of diagnoses were made by single clinicians rather than consensus conference, which may reduce certainty about who truly had dementia. The brief test may not separate normal cognition from mild cognitive impairment well enough to replace detailed neuropsychological testing when that distinction is unclear.
Declared interests
No author conflict statement or named funder appears in the supplied text; the paper is listed as supported by non-U.S. government research.
The easy way to misread this
Do not start using MoCA-Brief as a stand-alone dementia screen. It was developed and tested only as items within the full MoCA, and the authors state it must be validated when administered alone.