Calculator Inputs
Use recent measurements when possible. This tool is a structured screening aid, not a diagnosis.
Example Data Table
Use this sample profile to understand how the weighted model behaves.
| Age | BMI | Weight Loss % | Exhaustion Days | TUG Seconds | Grip kg | Activity Minutes | Comorbidities | Cognitive Score | ADL Limits | Falls | Score | Band |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 79 | 20.2 | 7 | 4 | 15 | 21 | 60 | 4 | 25 | 2 | 2 | 56.69 | Moderate Frailty Risk |
Formula Used
This calculator uses a weighted screening model. Each input becomes a normalized risk value between 0 and 1. Larger burden means a larger normalized value.
Frailty Risk Score = Σ (Normalized Domain Risk × Domain Weight)
- Each domain is scaled into a 0 to 1 risk range.
- Direct-risk measures rise as the observed burden rises.
- Inverse measures, such as strength and activity, add risk when values fall below target ranges.
- All domain weights sum to 100, so the final score ranges from 0 to 100.
| Domain | Weight | Scaling Logic |
|---|---|---|
| Age | 10 | (Age − 50) ÷ 40, clamped to 0–1 |
| BMI / Nutrition | 6 | Low BMI adds more risk; very high BMI adds moderate risk |
| Weight Loss | 10 | Weight loss % ÷ 10, capped at 1 |
| Exhaustion | 8 | Exhaustion days ÷ 7 |
| Timed Up and Go | 16 | (Seconds − 8) ÷ 12, capped to 0–1 |
| Grip Strength | 12 | (35 − Grip kg) ÷ 20, capped to 0–1 |
| Physical Activity | 8 | (150 − Weekly minutes) ÷ 150, capped to 0–1 |
| Comorbidity Burden | 10 | Condition count ÷ 6 |
| Cognitive Score | 8 | (30 − Score) ÷ 10 |
| ADL Limitations | 8 | ADL limitations ÷ 6 |
| Falls History | 4 | Falls count ÷ 4 |
Interpretation bands: below 25 = low risk, 25–49.99 = mild risk, 50–74.99 = moderate risk, and 75+ = high risk.
How to Use This Calculator
- Enter recent measurements for function, mobility, cognition, and daily living status.
- Use realistic values from screening notes, clinic visits, or home assessments.
- Press Calculate Frailty Score to place the result above the form.
- Review the score, the risk band, and the highest weighted drivers.
- Study the Plotly graph to see which domains are contributing most.
- Use the CSV or PDF buttons to export the calculated result.
- Compare your output with the example table for a practical benchmark.
- Use results for screening support only, not as a diagnosis.
FAQs
1) What does this frailty score estimate?
It estimates overall frailty burden by combining functional, physical, and cognitive indicators into one weighted score. It is best used for screening, tracking trends, and prioritizing follow-up discussion.
2) Is this the same as a formal clinical diagnosis?
No. This page provides a structured estimate, not a formal diagnosis. Clinical assessment, history, examination, and validated tools should guide final decisions.
3) Why are mobility and strength weighted heavily?
Mobility delay and low strength often reflect reduced reserve, fall risk, and functional decline. They are strong practical markers, so they receive larger weights in this model.
4) Can younger adults use this calculator?
Yes, but it is most meaningful for older adults and higher-risk populations. Results in younger people should be interpreted carefully and alongside full clinical context.
5) What if I do not know one measurement?
Try to collect the missing value instead of guessing. Estimated or assumed values can change the final score and distort the true risk pattern.
6) How often should frailty risk be reviewed?
Review intervals depend on health status. Many teams reassess after a significant illness, fall, hospital visit, or noticeable change in function or nutrition.
7) Why does activity lower the score?
Higher weekly movement usually supports endurance, muscle function, and independence. Lower activity can signal deconditioning, which increases frailty burden in this model.
8) Can the score improve over time?
Yes. Better nutrition, safer mobility, strength training, chronic disease control, and support for cognition or daily tasks may improve several weighted domains.