BACKGROUND:Although there is a general perception that, as the older population grows in number, more are undergoing surgery, there are few data on trends in major resections for cancer and short-term outcomes in this group. METHODS: The Nationwide Inpatient Sample was (NIS) used to estimate the national trends of major upper abdominal resections (esophagus, stomach, liver, pancreas) for cancer in octogenarians (aged 80 years) from 2001 to 2011. Resection rates performed per year were incidence-adjusted within this age group for each cancer type as determined by the NIS database. Joinpoint regression was used to calculate average annual percentage changes (AAPC) when evaluating trends over time. RESULTS: During the study period, octogenarians underwent an estimated 30,356 upper abdominal organ resections for cancer in the United States, representing 3.8% of all cancer admissions among octogenarians. Resection rates in octogenarians increased significantly over time (AAPC, 2.54; P < .001) secondary to increasing trends in pancreatic (AAPC, 11.52; P < .001) and hepatic (AAPC, 6.67; P < .001) resections. Elixhauser comorbidity index scores increased from a mean of 3.61 to 4.20 (AAPC, 1.31; P < .001), whereas inpatient mortality during this time decreased from 13.6% to 8.2% (AAPC, 5.58; P < .001). CONCLUSIONS: Overall rates of major upper abdominal cancer resections in octogenarians are increasing over time, driven by increases in liver and pancreatic resections. These increases were observed despite a less favorable patient morbidity profile over time. These patterns may suggest shifting selection criteria for octogenarians undergoing major abdominal surgery over time in the context of diminishing postoperative mortality. Cancer 2018;124:125-35. V C 2017 American Cancer Society.KEYWORDS: abdominal surgery, gastrointestinal cancer, national trends, octogenarian, outcomes.
INTRODUCTIONOctogenarians (patients ages 80 years) have traditionally been considered at higher risk for major surgical procedures, including various types of cancer resections. This particular population is growing rapidly, with current forecasts estimating an increase in the population aged 85 years older from 1.7% of the population (5.4 million individuals) in 2008 to 7.5% of the population (projected, 27-35 million individuals) by 2050. 1 Likewise, it is estimated that adults aged 75 will increase from 18.7 million (6.1%) in 2010 to a projected 33.3 million (11%) by 2030. 2 The older population is also at the higher risk of developing cancer, with 60% of new diagnoses of malignancies occurring in those aged 65 years. 3,4 However, data reporting specific trends and outcomes in octogenarians with regard to major abdominal operations for cancer are relatively lacking. Characterization of such trends may be particularly important to help identify changes in selection criteria for surgery in this growing older adult population.Several recent studies have demonstrated similar postoperative outcomes in older adult patients compared with younger cohort...