段階的な説明
Gather Your Health Metrics
Collect your current metrics, including age, years of education, systolic blood pressure, BMI, total cholesterol, activity levels, and genetic status if known.
Assign Points to Each Category
Use the simplified CAIDE point system to score each metric. Be careful to use the correct units for cholesterol (mmol/L vs. mg/dL) and blood pressure.
Sum Your Points
Add the points from all categories together to calculate your total Dementia Risk Score. The maximum potential score is 15 points.
Interpret Your Score and Plan Next Steps
Map your total score to the risk categories (Low, Moderate, or Elevated). Identify modifiable factors like exercise or blood pressure where you can make positive improvements.
Empowering Your Brain Health
Taking charge of your cognitive future can feel incredibly empowering! While we cannot predict the future with absolute certainty, researchers have developed reliable scoring models to help us understand our risk of developing dementia as we age. The most famous of these is the CAIDE (Cardiovascular Risk Factors, Aging, and Incidence of Dementia) Risk Score.
By calculating this score manually, you will learn which health and lifestyle factors play the biggest roles in cognitive longevity. Remember, this tool is designed to encourage positive lifestyle adjustments—not to cause worry. Many of these risk factors are highly modifiable, meaning you have the power to change them!
Prerequisites and What You Need
Before starting, gather the following information about yourself or the person you are calculating for:
- Age
- Education level (in years)
- Systolic blood pressure (the top number on your BP reading, in mmHg)
- Body Mass Index (BMI) (you can find this using weight and height)
- Total cholesterol level (in mmol/L or mg/dL)
- Physical activity level (active vs. inactive)
- APOE ε4 status (optional genetic marker; if unknown, we can score without it)
The Simplified CAIDE Scoring Formula
To find your risk score, you will assign points to different categories and then add them together.
1. Demographic Factors
- Age:
- Under 47 years: 0 points
- 47 to 53 years: 3 points
- Over 53 years: 4 points
- Education:
- More than 9 years of formal education: 0 points
- 9 years or less: 2 points
2. Physical Health & Lifestyle Factors
- Systolic Blood Pressure:
- 140 mmHg or lower: 0 points
- Over 140 mmHg: 2 points
- Body Mass Index (BMI):
- 30 kg/m² or lower (not obese): 0 points
- Over 30 kg/m² (obese): 2 points
- Total Cholesterol:
- 6.5 mmol/L or lower (under 250 mg/dL): 0 points
- Over 6.5 mmol/L (250 mg/dL or higher): 2 points
- Physical Activity:
- Active (moderate exercise 2-3 times/week for 20+ mins): 0 points
- Inactive: 1 point
3. Genetic Factor (Optional)
- APOE ε4 Carrier Status:
- Negative (or unknown): 0 points
- Positive (carries at least one ε4 allele): 2 points
Worked Example: Sarah's Score
Let's calculate the score for Sarah, a vibrant 55-year-old woman:
- Age: 55 years old �KINL1� 4 points (over 53)
- Education: Completed college (16 years) �KINL2� 0 points (more than 9 years)
- Systolic BP: 135 mmHg �KINL3� 0 points (under 140)
- BMI: 28 kg/m² �KINL4� 0 points (under 30)
- Total Cholesterol: 6.8 mmol/L �KINL5� 2 points (over 6.5)
- Physical Activity: Exercises once a month �KINL6� 1 point (inactive)
- APOE ε4 Status: Unknown �KINL7� 0 points
Sarah's Total Score: �KBLK0�
What Does Sarah's Score Mean?
Based on epidemiological studies, we map the total score to a 20-year dementia risk probability:
- 0 to 5 points (Low Risk): Under 5% probability of developing dementia in the next 20 years.
- 6 to 8 points (Moderate Risk): Approximately 5% to 15% probability.
- 9 to 15 points (Elevated Risk): 15% to 40%+ probability.
Sarah's score of 7 puts her in the Moderate Risk category. By increasing her physical activity and working with her doctor to lower her cholesterol, she could potentially lower her score to 4, dropping her into the Low Risk category!
Common Pitfalls to Avoid
- Confusing Cholesterol Units: Cholesterol can be measured in mmol/L (common in Canada/Europe) or mg/dL (common in the US). Ensure you convert correctly: �KINL8�.
- Assuming Risk is Destiny: A high score is not a diagnosis. It is a statistical probability designed to highlight areas where you can make healthy lifestyle changes.
- Using Current Age for Future Predictions: This model is optimized for mid-life risk factors (ages 40-60) predicting late-life dementia. If you are already over 75, this specific scoring system may not accurately reflect your current risk profile.
When to Use an Online Calculator
While doing the math by hand is a fantastic way to understand the underlying science, an online Dementia Risk Calculator is highly convenient when:
- You don't have time to look up point values.
- You want to run multiple "what-if" scenarios quickly (e.g., "What if I lower my blood pressure and start walking daily?").
- You want to generate a clean, printable report to share with your primary care physician during your next wellness checkup.