Mini-Cog
Top Contributors - Safiya Naz, Kim Jackson and Areeba Raja
Description
The Mini-Cog is a neuropsychological test that has been shown to be beneficial in detecting dementia sufferers. Although its sensitivity and specificity for diagnosing cognitive impairment vary by region and way of interpretation, it has been proven to have good sensitivity and specificity. Memory complaints and illnesses such as Alzheimer's disease and other form of dementia are becoming more widespread as a result of the growing number of older persons.[1]
The Mini Cog is a short cognitive impairment screening exam. Mini-Cog, with excellent screening characteristics and spending less time, could be considered to be used as a screening tool among communities to help to diagnose dementia early[2]
It combines a short memory test with a simple clock-drawing test to enable for fast screening for short-term memory problems, learning disabilities, and other cognitive functions that are reduced in dementia patients. [3]
Technique
- The procedure takes about 3 minutes to complete.
- It contains little language, which helps to reduce cultural and educational prejudice.
- A 3-item recall component is combined with a Clock Drawing Test (CDT).
Steps
- Make sure the patient is paying attention to you. Instruct the patient to pay close attention to and recall three unrelated words, then repeat them back to you so you can be sure they heard them correctly.
- Instruct the patient to draw a clock face on a blank sheet of paper or on a page that already has the clock circle drawn on it. Ask the patient to draw the hands of the clock to read a specified time after he or she has placed the numbers on the clock face (11:10 or 8:20 are most commonly used and are more sensitive than some others).
- Request that the patient repeat the three words that were previously presented. [4]
Scoring
Recall: The recall test is graded on a scale of 0 to 3.After the CDT distracter, a score was given for each recalled word.
Clock Drawing Test (CDT): The CDT test presents a score of 0 or 2.A typical CDT is worth two points. A CDT that is irregular earns 0 points. All numbers must be presented in the exact sequence and position for a regular CDT, and the hands must indicate the requested time readably.
Mini-Cog Score: Add the recall and CDT scores to get the mini-cog score. A score of 0-2 indicates a positive dementia screen. A score of 3-5 indicates a negative dementia screening. [4]
Validity
The Mini-Cog has a sensitivity of 76-99 percent and a specificity of 89-93 percent with a 95 percent confidence interval. The chi square test revealed that Alzheimer's dementia had a score of 234.4, while other dementias had a score of 118.3. (p0.001).This tool has a strong predictive value in a range of health settings.[6]
The Mini-Cog is a quick and easy tool to screen for cognitive impairment (CI) in older adults across different healthcare settings. A review of 14 studies involving over 10,000 patients found it to be fairly accurate. For detecting dementia, it showed 76% sensitivity and 83% specificity, and for mild cognitive impairment (MCI), 84% sensitivity and 79% specificity. In primary care, it was 73% sensitive and 84% specific, while in secondary care, it was 73% sensitive and 76% specific. Although some studies had issues with bias, the Mini-Cog remains a practical option for resource-limited or time-sensitive environments.[7]
Resources
- MINI-COG: Instruction for assessment and scoring
- Click here to access MINI-COG in different languages.
References
- ↑ Limpawattana P, Manjavong M. The Mini-Cog, Clock Drawing Test, and Three-Item Recall Test: Rapid Cognitive Screening Tools with Comparable Performance in Detecting Mild NCD in Older Patients. Geriatrics. 2021 Sep;6(3):91.
- ↑ Yang L, Yan J, Jin X, Jin Y, Yu W, Xu S, Wu H. Screening for dementia in older adults: comparison of Mini-Mental State Examination, Mini-Cog, Clock Drawing test and AD8. PloS one. 2016 Dec 22;11(12):e0168949.
- ↑ Michieletto F, Binkin N, Saugo M, Boorson S, Scanlan J. Use of the Mini-Cog test as a screening method for dementia in the Italian population: the Argento Study results. Igiene e sanità pubblica. 2006 Mar 1;62(2):159-72.
- ↑ 4.0 4.1 Borson S, Scanlan J, Brush M, Vitaliano P, Dokmak A. The mini-cog: a cognitive 'vital signs' measure for dementia screening in multi-lingual elderly. Int J Geriatr Psychiatry. 2000 Nov;15(11):1021-7.
- ↑ https://www.youtube.com/watch?v=De7aluks7y8
- ↑ Borson S, Scanlan JM, Chen P, Ganguli M. The Mini‐Cog as a screen for dementia: validation in a population‐based sample. Journal of the American Geriatrics Society. 2003 Oct;51(10):1451-4.
- ↑ Abayomi SN, Sritharan P, Yan E, Saripella A, Alhamdah Y, Englesakis M, Tartaglia MC, He D, Chung F. The diagnostic accuracy of the Mini-Cog screening tool for the detection of cognitive impairment—A systematic review and meta-analysis. PLoS One. 2024 Mar 14;19(3):e0298686.