Finding 1 of 11
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About 3 in 10 people with mild cognitive impairment develop dementia within 3 years
We followed 988 people who started with mild cognitive impairment and no dementia, and counted how many were later diagnosed with dementia. About 8 in 100 had been diagnosed by one year, 21 in 100 by two years, 30 in 100 by three years and 38 in 100 by four years. Half had been diagnosed by roughly six and a half years. These are averages across a large group and say little about any one person.
| Measure | Value | n |
|---|---|---|
| Diagnosed with dementia by 12 months | 8.2% (95% CI 6.6-10.1) | 988 |
| by 24 months | 20.9% (18.4-23.7) | 988 |
| by 36 months | 30.2% (27.2-33.4) | 988 |
| by 48 months | 37.7% (34.3-41.3) | 988 |
Caveat. This is a research cohort of volunteers seen at memory clinics, so rates are higher than in the general population, and allowing for the timing of clinic visits moves the one-year figure up to about 13%.
Source report: /home/arodrig5/adni_pipeline/out/summary.md