💪 SARC-F Sarcopenia Screening
SARC-F is a rapid five-item, patient-reported screen for sarcopenia suitable for community and outpatient settings.
SARC-F has high specificity but only moderate sensitivity, so it is a rule-in first-line screen and a low score does not fully exclude sarcopenia in high-risk patients (original synthesis · not guideline verbatim).
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When to use
Score each of the five domains (strength, walking, rising from a chair, climbing stairs, falls) 0–2; the tool totals them out of 10.
How it works
Total = strength + walking + chair-rising + stair-climbing + falls, each 0–2 (range 0–10). A total ≥4 suggests sarcopenia risk.
Key points
- SARC-F has high specificity but only moderate sensitivity, so it is a rule-in first-line screen and a low score does not fully exclude sarcopenia in high-risk patients (original synthesis · not guideline verbatim).
- A positive screen (≥4) should be followed by objective assessment: grip strength, gait speed, and muscle mass by DXA or BIA.
- Adding calf circumference (SARC-CalF) improves sensitivity where a more thorough first-pass screen is wanted.
References
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| Difficulty lifting ~5 kg | No difficulty |
|---|---|
| Difficulty walking across a room | No difficulty |
| Difficulty rising from a chair or bed | No difficulty |
| Difficulty climbing 10 stairs | No difficulty |
| Falls in the past year | None |
→SARC-F0pts
- Interpretation：Lower sarcopenia risk
| Difficulty lifting ~5 kg | Much difficulty/unable |
|---|---|
| Difficulty walking across a room | Much difficulty/needs aid/unable |
| Difficulty rising from a chair or bed | Much difficulty/needs help |
| Difficulty climbing 10 stairs | Much difficulty/unable |
| Falls in the past year | ≥4 |
→SARC-F10pts
- Interpretation：Suggests sarcopenia risk, further assessment advised
Frequently asked questions
- What is SARC-F Sarcopenia Screening?
- SARC-F is a rapid five-item, patient-reported screen for sarcopenia suitable for community and outpatient settings.
- How is SARC-F Sarcopenia Screening calculated? What is the core formula?
- Total = strength + walking + chair-rising + stair-climbing + falls, each 0–2 (range 0–10). A total ≥4 suggests sarcopenia risk.
- When is SARC-F Sarcopenia Screening used?
- Score each of the five domains (strength, walking, rising from a chair, climbing stairs, falls) 0–2; the tool totals them out of 10.
- What are the key clinical points for SARC-F Sarcopenia Screening?
- SARC-F has high specificity but only moderate sensitivity, so it is a rule-in first-line screen and a low score does not fully exclude sarcopenia in high-risk patients (original synthesis · not guideline verbatim). A positive screen (≥4) should be followed by objective assessment: grip strength, gait speed, and muscle mass by DXA or BIA. Adding calf circumference (SARC-CalF) improves sensitivity where a more thorough first-pass screen is wanted.
- What are the limits and cautions when using SARC-F Sarcopenia Screening?
- For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.
- How is SARC-F Sarcopenia Screening calculated in practice? Can you show a worked example?
- Inputs: Difficulty lifting ~5 kg No difficulty, Difficulty walking across a room No difficulty, Difficulty rising from a chair or bed No difficulty, Difficulty climbing 10 stairs No difficulty, Falls in the past year None → Result: SARC-F 0 pts（Interpretation: Lower sarcopenia risk） Inputs: Difficulty lifting ~5 kg Much difficulty/unable, Difficulty walking across a room Much difficulty/needs aid/unable, Difficulty rising from a chair or bed Much difficulty/needs help, Difficulty climbing 10 stairs Much difficulty/unable, Falls in the past year ≥4 → Result: SARC-F 10 pts（Interpretation: Suggests sarcopenia risk, further assessment advised）