Description[edit | edit source]
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
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. 
[edit | edit source]
- 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[edit | edit source]
- 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. 
Scoring[edit | edit source]
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. 
Validity[edit | edit source]
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.
References[edit | edit source]
- 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.
- 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.