Explanatory power of known prognostic scoring systems to predict OS. (A) The addition of SPPB and SGDS-K improved the power of existing survival prediction models of the Wheatley index (without to with SPPB+SGDS-K; 32.1% to 42.2%; P < .001) and AML score for ED (without to with SPPB+SGDS-K; 25.7% to 35.7%; P = .007) but not in AML score for CR (without to with SPPB+SGDS-K; 37.0% to 41.5%; P = .093). (B) Adding gait speed and SGDS-K improved the prediction power of the Wheatley index (without to with gait speed+SGDS-K; 32.1% to 46.9%; P < .001), AML score for ED (without to with gait speed+SGDS-K; 25.7% to 43.2%; P < .001), and AML score for CR (without to with gait speed+SGDS-K; 37.0% to 47.5%; P = .013). (C) Adding sit-and-stand speed and SGDS-K improved the prediction power of the Wheatley index (without to with sit-and-stand speed+SGDS-K; 32.1% to 51.2%; P < .001), AML score for ED (without to with sit-and-stand speed+SGDS-K; 25.7% to 48.9%; P < .001), and AML score for CR (without to with sit-and-stand speed+SGDS-K; 37.0% to 50.7%; P = .027). *P < .05; **P < .01; ***P < .001.