We read with great interest the prospective single-center cohort study by Sundaramurthy and colleagues evaluating frailty in critically ill cancer patients and its association with acute clinical outcomes and 90-day post-discharge health-related quality of life. 1 The authors should be commended for addressing a clinically relevant and understudied area in onco-critical care, particularly within a lower-middle-income country setting.One of the most striking findings of the study is the reported 100% prevalence of frailty among the enrolled cohort. 1 While this observation highlights the extreme vulnerability of critically ill oncology patients, its interpretation warrants careful consideration in light of the clinical frailty scale (CFS) threshold used to define frailty.In this study, patients with a CFS score of 4 were classified as frail.However, in the original description and in much of the existing critical care literature, CFS 4 is generally described as "vulnerable" or "prefrail," whereas CFS scores 5 more consistently represent established frailty. 2 Including CFS 4 within the frailty definition may, therefore, inflate frailty prevalence estimates, potentially explaining the discrepancy between the present findings and previously reported prevalences of approximately 25-45% in general ICU and oncological ICU populations. 344]5 This methodological distinction is important, as frailty prevalence directly influences prognostication, resource allocation, and the external validity of frailty-based clinical decision-making.We believe that the manuscript would be further strengthened by the inclusion of a sensitivity analysis using CFS 5 as an alternative frailty cutoff or by reporting outcomes separately for patients classified as CFS 4 ("vulnerable") and those with CFS 5 ("frail").Such an approach would preserve the authors' key observations while improving comparability with prior studies and facilitating inclusion in future pooled analyses.Additionally, age and comorbidity burden are described as "risk factors for frailty."Given that all enrolled patients met the study's frailty definition, these variables may be more appropriately interpreted as predictors of increasing frailty severity rather than of frailty occurrence itself.Clarifying this distinction, potentially by emphasizing ordinal progression in CFS categories, would enhance conceptual clarity.Despite these considerations, the study provides valuable evidence that increasing frailty severity is associated with prolonged organ support, longer ICU and hospital stays, higher mortality, and impaired post-discharge quality of life.The emphasis on frailtyinformed care pathways and rehabilitation strategies is particularly relevant for improving outcomes in onco-critical care.In conclusion, we congratulate the authors on this important contribution.Clarifying the operational definition of frailty and incorporating sensitivity analyses based on alternative CFS thresholds would further strengthen the manuscript's impact and clinical applicability.
Ferhan Demirer Aydemir (Wed,) studied this question.