What is the Clinical Frailty Scale?
The CFS is a 9-point judgement-based frailty tool from Dalhousie University. It describes function two weeks before any acute illness.
CFS levels
| Level | Description |
|---|
| 1–3 | Not frail (very fit, fit, managing well) |
| 4 | Living with very mild frailty |
| 5–6 | Mild to moderate frailty |
| 7–8 | Severe to very severe frailty |
| 9 | Terminally ill |
It is validated mainly in people aged 65 and over. Avoid using it in younger people, those with stable single-condition disability, or learning disability.
Frequently asked questions
What CFS score means frail?
Level 5 or more is generally regarded as frail. Level 4 is very mild frailty.
Is the Clinical Frailty Scale free to use?
Dalhousie University allows free use in clinical care, education and research.
Who should the CFS be used for?
Mainly adults aged 65 and over.
References
- Rockwood K, Song X, MacKnight C, et al. A global clinical measure of fitness and frailty in elderly people. CMAJ 2005;173(5):489–95.
- Clinical Frailty Scale version 2.0. Dalhousie University. dal.ca
MedToolbox supports, and does not replace, clinical judgement, national guidance and local policy.
