The use of a frailty index to predict adverse postoperative outcomes of older surgical patients/reply

[...]the FI used in this study only includes the preoperative factors associated with adverse postoperative outcomes, such as medical comorbidities, physical and cognitive impairments, psychosocial risk factors, common geriatric syndromes, etc.Because the surgical burden and major complications are the important determinants for postoperative mortality, the preoperative risk factors commonly used for predictive models may not completely explain postoperative outcomes.[...]a limitation of this study design is the lack of comparison of the predictive ability of the preoperative FI for adverse postoperative outcomes with those of other established preoperative risk scores or models, such as modified frailty index, American Society of Anesthesiologists physical status classification, Charlson Comorbidity Index, Portsmouth-modified Physiological and Operative Severity Score for the enumeration of Mortality and Morbidity, etc.[...]an important issue that cannot be answered by this study is whether the predictive ability of the preoperative FI for adverse postoperative outcomes in older surgical patients equals or surpasses these established preoperative risk scores or models.