Authors: Ngamruengphong S, Li F, Zhou Y, Chak A, Cooper GS, Das A
Title: EUS and survival in patients with pancreatic cancer: a population-based study.
Journal: Gastrointest Endosc 72(1):78-2
Date: 2010 Jul
Abstract: BACKGROUND: There is no direct evidence that EUS improves patient outcome. OBJECTIVE: To study the association of undergoing EUS with survival in patients with pancreatic adenocarcinoma. DESIGN: Population-based study. PATIENTS: Persons aged 65 years and older with a diagnosis of pancreatic cancer who were captured in the linked Surveillance Epidemiology and End Results-Medicare database between 1994 and 2002 were identified. INTERVENTIONS: Demographic, cancer-specific, and EUS procedural information was extracted, and survival curves were compared for patients who underwent EUS in the peridiagnostic period (1 month before the diagnosis to 3 months after the date of diagnosis: group I) with those who had not undergone EUS (group II). MAIN OUTCOME MEASUREMENTS: Relative hazard ratios for survival. RESULTS: A total of 8616 patients with pancreatic adenocarcinoma were identified. Only 610 (7.1%) patients underwent EUS evaluation. In patients with locoregional cancer, the median survival (interquartile range) in group I and II patients was 10 (5-17) and 6 (2-12) months, respectively, P < .0001. There were more patients with early-stage disease in group I than group II (69.3% vs 36.2%, P < .001). Curative-intent surgery, chemotherapy, and radiation therapy were also performed more frequently in the patients in group I. Undergoing EUS, adjusted for age, race, sex, tumor stage, curative-intent surgery, chemotherapy, radiation therapy, and comorbidity score, was an independent predictor of improved survival (relative hazard, 0.71; 95% CI, 0.63-0.79). LIMITATIONS: Retrospective design. CONCLUSIONS: EUS evaluation is independently associated with improved outcome in patients with locoregional pancreatic cancer, possibly because of detection of earlier cancers and improved stage-appropriate management including more selective performance of curative-intent surgery.