Comparison of C-index between combined group and skeletal muscle index or serum creatinine alone
| Included variable | Combined group | SMI | Combined group | Creatinine |
|---|---|---|---|---|
| C-index (95% CI) (bootstrapped) | 0.626 (0.587–0.666) | 0.564 (0.524–0.602) | 0.626 (0.587–0.666) | 0.583 (0.544–0.623) |
| Estimated difference | 0.062 (0.031–0.103) | 0.043 (0.017–0.081) | ||
C-index = Harrell’s concordance index; SMI = skeletal muscle index; CI = confidence interval.