Dementia Risk Calculator

Dementia Risk Calculator

Estimate the 20-year risk of dementia from midlife factors with the CAIDE risk score.

years
Sex
years
The top number.
mmHg
kg/m²
Total cholesterol
mg/dL
Physically active?At least 20–30 minutes of exercise causing breathlessness and sweating, twice a week or more.

Your result

Enter your numbers and press the button. Your result appears here.

How the CAIDE score works

CAIDE adds points for seven midlife factors linked with dementia 20 years later in a Finnish study of 1,409 people.

Age 47–53: 3, over 53: 4 · Education 7–9 y: 2, 0–6 y: 3 · Male: 1 · SBP > 140: 2 · BMI > 30: 2 · Cholesterol > 6.5 mmol/L: 2 · Inactive: 1

Score 0–5: 1.0% risk; 6–7: 1.9%; 8–9: 4.2%; 10–11: 7.4%; 12–15: 16.4% over 20 years.

CAIDE score and 20-year risk

ScoreDementia risk in 20 years
0–51.0%
6–71.9%
8–94.2%
10–117.4%
12–1516.4%

Common questions

How accurate is a life expectancy estimate?

It is an average for everyone your age and sex. Your own health, habits and family history can move it by many years either way.

Is PhenoAge the same as an epigenetic clock?

No. PhenoAge uses routine blood tests; epigenetic clocks use DNA methylation. Both were developed by Levine and colleagues.

How can I lower my risk of falling?

Strength and balance exercise such as tai chi, a medicine review, eye checks, safe footwear and removing trip hazards at home.

What is a normal walking speed for older adults?

About 1.2 to 1.3 m/s in the 60s and 70s. Below 0.8 m/s is considered slow.

What is a good Barthel score?

100 means fully independent in the 10 activities. Under 60 usually means significant help is needed.

Sources

  • US Social Security Administration. Actuarial life table, 2022 period life table (2025 Trustees Report).
  • Levine ME et al. An epigenetic biomarker of aging for lifespan and healthspan. Aging 2018;10:573–591; Liu Z et al. PLoS Med 2018;15:e1002718 (and correction).
  • Morris JF, Temple W. Spirometric "lung age" estimation for motivating smoking cessation. Prev Med 1985;14:655–662. Quanjer PH et al. ECSC lung volumes and forced ventilatory flows. Eur Respir J 1993;6 Suppl 16:5–40.
  • CDC. STEADI: Stay Independent brochure. Morse JM et al. A prospective study to identify the fall-prone patient. Soc Sci Med 1989;28:81–86.
  • Bohannon RW, Andrews AW. Normal walking speed: a descriptive meta-analysis. Physiotherapy 2011;97:182–189. Studenski S et al. Gait speed and survival in older adults. JAMA 2011;305:50–58.
  • Mahoney FI, Barthel DW. Functional evaluation: the Barthel Index. Md State Med J 1965;14:61–65. Shah S et al. J Clin Epidemiol 1989;42:703–709.
  • Morley JE et al. A simple frailty questionnaire (FRAIL). J Nutr Health Aging 2012;16:601–608. Searle SD et al. A standard procedure for creating a frailty index. BMC Geriatr 2008;8:24.
  • Kivipelto M et al. Risk score for the prediction of dementia risk in 20 years among middle aged people. Lancet Neurol 2006;5:735–741. Tombaugh TN, McIntyre NJ. J Am Geriatr Soc 1992;40:922–935.