Modified Frailty Index Predicts Morbidity and Mortality After Pancreaticoduodenectomy.

Abstract

Pancreatic cancer is a disease of older adults, who may present with limited physiologic reserve. The authors hypothesized that a frailty index can predict postoperative outcomes after pancreaticoduodenectomy (PD). All patients who underwent PD were identified in the 2005-2012 NSQIP Participant Use File. Patients undergoing emergency procedures, those with an American Society of Anesthesiologists (ASA) classification of five, and those with a diagnosis of preoperative sepsis were excluded from the study. A modified frailty index (mFI) was defined by 11 variables within the National Surgical Quality Improvement Program (NSQIP) previously used for the Canadian Study of Health and Aging-Frailty Index. An mFI score of 0.27 or higher was defined as a high mFI. Uni- and multivariate analyses were performed to evaluate postoperative outcomes. This study enrolled 9986 patients (age 65±12years, 48.8% female) who underwent PD. Of these patients, 6.4% (n=637) had a high mFI (>0.27). Increasing mFI was associated with higher prevalence of postoperative morbidity (p<0.001) and 30-days mortality (p<0.001). In the univariate analysis, high mFI was associated with increased morbidity (odds ratio [OR] 1.68; 95% confidence interval [CI] 1.43-1.97; p<0.001) and 30-days mortality (OR 2.45; 95% CI 1.74-3.45; p<0.001). After adjustment for age, sex, ASA classification, albumin level, and body mass index (BMI), high mFI remained an independent preoperative predictor of postoperative morbidity (OR 1.544; 95% CI 1.289-1.850; p<0.0001) and 30-days mortality (OR 1.536; 95% CI 1.049-2.248; p=0.027). High mFI is associated with postoperative morbidity and mortality after PD and can aid in preoperative risk stratification.