Mini-Cog Dementia Screening
The Mini-Cog is a brief 3-minute cognitive screening tool that combines 3-word recall with a clock-drawing test. It is validated for dementia screening in primary care and geriatric settings, with minimal education and language bias.
About
The Mini-Cog was developed by Dr. Soo Borson and colleagues in 2000 as a brief, clinically useful screening tool for dementia that overcomes some limitations of longer instruments like the MMSE. It consists of two components: a 3-word recall test (memory domain) and a clock-drawing test (visuospatial/executive domain), taking approximately 3 minutes to administer. The Mini-Cog has several advantages: it is free and in the public domain, requires no special training or materials (only a pen and paper), has minimal language and education bias, and performs well across diverse cultural and linguistic populations. The scoring algorithm prioritizes the memory component: if word recall is 0/3, the screen is positive regardless of clock drawing; if word recall is 3/3, the screen is negative; if word recall is 1-2/3, the clock drawing determines the result (abnormal = positive, normal = negative). The Mini-Cog demonstrates sensitivity of 76-99% and specificity of 76-96% for dementia screening, comparable to the MMSE. It is recommended by the Alzheimer's Association and the US Preventive Services Task Force (USPSTF) as a screening tool for cognitive impairment in older adults.
Formula
Score = Word Recall (0-3) + Clock Draw (0 or 2). Algorithm: 0/3 recall → positive; 3/3 recall → negative; 1-2/3 recall → positive if clock abnormal, negative if clock normal.
The Mini-Cog uses a hierarchical algorithm rather than a simple sum score. The 3-word recall component is primary: if the patient cannot recall any of the 3 words (score 0), dementia is likely and the test is positive regardless of clock-drawing performance. If the patient recalls all 3 words (score 3), dementia is unlikely and the test is negative regardless of clock-drawing. If the patient recalls 1 or 2 words, the clock-drawing test determines the result: a normal clock (drawing with all numbers placed correctly and hands set to a specified time, scored as 2 points) indicates a negative screen, while an abnormal clock (any significant error, scored as 0 points) indicates a positive screen. The total numeric score (0-5) can be tracked over time, but clinical interpretation is based on the algorithm outcome. The Mini-Cog takes approximately 3 minutes to administer and requires only a pen and paper.
Score Interpretation
The Mini-Cog is one of the most widely recommended brief cognitive screening tools for primary care due to its speed (3 minutes), minimal language and education bias, and public domain availability. It has been validated in multiple ethnic and linguistic populations including English, Spanish, Chinese, Korean, and Vietnamese speakers. The Mini-Cog's clock-drawing component provides valuable information about executive function and visuospatial abilities that complement the memory assessment. The Alzheimer's Association recommends the Mini-Cog as a screening tool during the Medicare Annual Wellness Visit. The USPSTF notes that the Mini-Cog has comparable accuracy to the MMSE for dementia screening with the advantage of being freely available. Serial Mini-Cog assessments can track cognitive decline over time.
Positive (High Risk) — 0–2
Positive screen for dementia. Comprehensive evaluation required.
Management: Refer for comprehensive dementia workup including neuropsychological testing, neuroimaging, and laboratory evaluation for reversible causes.
Negative (Low Risk) — 3–5
Negative screen for dementia.
Management: No further evaluation indicated. Reassess if cognitive concerns emerge or progress.
Reference Ranges
| Population | Normal Range | Notes |
|---|---|---|
| Older adults (65+ years) | 3-5 (Negative) | Negative screen — dementia unlikely |
| Older adults (65+ years) | 0-2 (Positive) | Positive screen — comprehensive evaluation needed |
Dr. Mahmoud El-Sayed, MD, Neurology Specialist
Dr. Mahmoud El-Sayed is a neurology consultant with expertise in cognitive disorders and dementia.
View medical review board & editorial policy →Example Calculation
A 76-year-old Spanish-speaking man with 6 years of education presents for Medicare Annual Wellness Visit. The Mini-Cog is administered in Spanish. He recalls 1 of 3 words (apple, penny, table — recalled "apple" only). His clock drawing shows all numbers placed correctly on the clock face but the hands are missing. Word recall: 1/3, Clock draw: 0 (abnormal). Algorithm: word recall 1-2/3 + abnormal clock = positive screen. Total score: 1/5. Result: Positive screen for dementia. Recommended: full dementia workup including neuropsychological testing with Spanish-speaking provider, brain imaging, and laboratory tests to rule out reversible causes.
Related Conditions
Related Medications
Common Mistakes
Scoring clock drawing as 1 point instead of 0 or 2
The Mini-Cog clock is scored as either normal (2 points) or abnormal (0 points). There is no partial score. Any significant error makes the clock abnormal.
Using total score only without applying the algorithm
The Mini-Cog interpretation is algorithm-based, not score-based. A total score of 2 could mean different things: recall 0/3 + clock 2 (positive) vs recall 2/3 + clock 0 (positive). Always apply the algorithm steps.
Frequently Asked Questions
How long does Mini-Cog take to administer?
Does Mini-Cog require special training?
References
- Borson S, Scanlan JM, Chen PJ, et al. The Mini-Cog: a cognitive "vital signs" measure for dementia screening in multi-lingual elderly. Int J Geriatr Psychiatry. 2000;15(11):1021-1027. PubMed
- Borson S, Scanlan JM, Watanabe J, et al. Improving identification of cognitive impairment in primary care. Int J Geriatr Psychiatry. 2006;21(4):349-355. PubMed
- US Preventive Services Task Force. Screening for Cognitive Impairment in Older Adults: Recommendation Statement. JAMA. 2020;323(8):757-763. PubMed