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Printed on 4/21/2026
For informational purposes only. This is not medical advice.
SARC-CalF combines the SARC-F functional questionnaire with an added calf-circumference risk component to improve sensitivity for probable sarcopenia. The method keeps SARC-F (0-10) and adds points when calf circumference falls below sex/population cutoffs. A common positive threshold is 11 or higher, signaling need for objective muscle strength and performance evaluation.
Formula: SARC-CalF total = SARC-F (0-10) + calf-risk points (0 or 10), range 0-20; common positive threshold >=11.
SARC-CalF improves sensitivity over SARC-F alone in many cohorts; a threshold around >=11 is commonly applied but population-specific performance varies.
Higher SARC-CalF scores indicate higher probability of clinically meaningful sarcopenia risk and functional vulnerability.
Use in older-adult screening when quick sarcopenia risk triage is needed and calf circumference is available.
Calf circumference cutoffs vary by sex and population; this screen should be interpreted with local standards and confirmatory testing.
For related assessments, see SARC-F, SPPB Score and FRAIL Scale.
Disclaimer: This tool is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with questions about your health.
Screen for probable sarcopenia risk using SARC-F (0-10) across strength, walking, chair rise, stair climbing, and falls.
GeriatricsEstimate lower-extremity functional performance with SPPB total score (0-12) from balance, gait speed, and chair stands.
GeriatricsScreen frailty using the 5-item FRAIL scale (Fatigue, Resistance, Ambulation, Illnesses, Loss of weight).
GeriatricsAssess mobility and fall risk with the Timed Up and Go (TUG) test. TUG >12 seconds indicates high fall risk. Times the performance of standing, walking 3 meters, turning, and returning to seated.