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Any score of 24 or more (out of 30) indicates a normal cognition. Below this, scores can indicate severe (≤9 points), moderate (10–18 points) or mild (19–23 points) cognitive impairment. The raw score may also need to be corrected for educational attainment and age. [ 23 ]
It is scored out of 100, with a higher score denoting better cognitive function. At the recommended cut-off scores of 88 and 83, the ACE was reported to have good sensitivity and specificity for identifying different forms of dementia and other impairments of memory and judgement (0.93 and 0.71; 0.82 and 0.96, respectively). [ 5 ]
The negative predictive value for the total sample was 0.93 making it a good tool to rule out cognitive impairment. On all measures the GPCOG performed at least as well as the mini–mental state examination (MMSE). [1] [2] Of note, positive and negative predictive values depend on the prevalence of the disorder in the studied population.
A score of 27–30 would be expected for someone with normal cognition; A score of 21–26 would be expected for someone with mild neurocognitive disorder; A score of 1–20 would be expected for someone with dementia; For individuals with less than high school education: A score of 25–30 would be expected for someone with normal cognition
MoCA scores range between 0 and 30. [12] A score of 26 or over is considered to be normal. In a study, people without cognitive impairment scored an average of 27.4; people with MCI scored an average of 22.1; people with Alzheimer's disease scored an average of 16.2. [12]
Serial sevens (or, more generally, the descending subtraction task; DST), where a patient counts down from one hundred by sevens, is a clinical test used to test cognition; for example, to help assess mental status after possible head injury, in suspected cases of dementia or to show sleep inertia.
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In community samples, cutoff scores for likely dementia have ranged from 3.3 and above to 3.6 and above, while in patient samples the cutoff scores have ranged from 3.4 and above to 4.0 and above. [3] To improve the detection of dementia, the IQCODE can be used in combination with the Mini-Mental State Examination.