|Variables Entered in Model||Model Without Gait Speed||Model With Gait Speed|
|Variables entered in model*|
|STS risk score||1.06 (1.02–1.11)||1.05 (1.004–1.10)|
|Slow gait speed||—||3.05 (1.23–7.54)|
|Hosmer-Lemeshow chi-square†||11.53 (0.17)||10.29 (0.25)|
|AUC‡||0.70 (0.60–0.80)||0.74 (0.64–0.84)|
Improved model performance is suggested by a decrease in AIC, BIC, Hosmer-Lemeshow chi-square; an increase in AUC; and a positive IDI (24,25). STS risk score indicates the predicted risk of mortality or major morbidity according to the STS risk score (percentage).
Abbreviations as in Tables 1 and 3.