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Cutoff of the US-measured RFCSA, sensitivity, specificity, and NPV by gender.
| RFCSA | Sensitivity | Specificity | NPV | |
|---|---|---|---|---|
| Males | 13.2 mm | 90% | 70% | 67.74% (95% CI 48.63 to 83.32) |
| Females | 10.9 mm | 94% | 85% | 67.31% (95% CI 52.89 to 79.67) |
RFCSA: Rectus femoris cross-sectional area; NPV: Negative predictive value; US: Ultrasound; CI: Confidence interval.
