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Restricted cubic spline with 5 knots at percentiles 5%, 27.5%, 50%, 72.5%, and 95% (vertical dotted lines) showing the relationship between skeletal muscle index (SMI) (cm2/m2) and hazard ratios of overall survival (red line). Ninety‐five per cent confidence interval is indicated by the dotted blue lines. The model is adjusted for significant covariates depicted in Table 3.
