Frailty and Long-Term Mortality Following Emergency Laparotomy: A Comparison Between the 11-Item and 5-Item Modified Frailty Indices.

Emergency laparotomy (EL) is a high-risk operation which is increasingly performed on an aging patient population. Objective frailty assessment using a validated index has the potential to improve preoperative risk stratification. This study aimed to assess the correlation between frailty and long-term mortality and morbidity outcomes for older EL patients. Secondary aims were to compare the 11-item and shortened five-item modified frailty indices (mFIs) in terms of value and predictive validity. A prospective multicenter observational study of patients aged ≥55 y undergoing EL was conducted across five hospitals in New Zealand between 2017 and 2022. Frailty was measured using the 11-item and abbreviated five-item mFIs. Multivariable logistic regression was used to determine whether frailty was independently associated with one-year postoperative mortality and other morbidity outcomes. Correlation between the two frailty indices were assessed with the Spearman's correlation coefficient (P). Frailty assessments were performed in 861 participants, with the prevalence being 18.7% and 29.8% using the 11-item and five-item mFIs, respectively. Both frailty indices demonstrated similar associations with one-year mortality (two-fold increased risk), major complications, admission to intensive care unit, rehabilitation, and 30-d readmission. The 11-item mFI demonstrated a greater association with early mortality (four-fold increased risk), reoperations, and increased length of stay compared with the five-item frailty index. Spearman P was 0.6 (P < 0.001). Frailty, as identified by the 11-item and five-item mFIs, was associated with one-year mortality and other important morbidity outcomes for older EL patients. These forms of frailty assessment provide important information that may aid in risk assessment and patient-centered decision-making.

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