Publication date: November 2017
Source:European Journal of Cancer, Volume 86
Author(s): M. Plas, E. Rotteveel, G.J. Izaks, J.M. Spikman, H. van der Wal-Huisman, B. van Etten, A.R. Absalom, M.J.E. Mourits, G.H. de Bock, B.L. van Leeuwen
BackgroundElderly patients undergoing oncological surgery experience postoperative cognitive decline. The aims of this study were to examine the incidence of cognitive decline 3 months after surgery and identify potential patient-, disease- and surgery-related risk factors for postoperative cognitive decline in onco-geriatric patients.MethodsA consecutive series of elderly patients (≥65 years) undergoing surgery for the removal of a solid tumour were included (n = 307). Cognitive performance was assessed pre-operatively and 3 months postoperatively. Postoperative decline was defined as a decline in scores of cognitive tests of ≥25% on ≥2 of 5 tests.ResultsOf the patients who had completed the assessments, 117 (53%, 95% confidence interval [CI]: 47–60) had improved cognitive test scores, whereas 26 (12%, 95% CI: 7.6–16) showed cognitive decline at 3 months postoperatively. In patients aged >75 years, the incidence of overall cognitive decline 3 months postoperatively was 18% (95% CI: 9.3–27). In patients with lower pre-operative Mini–Mental State Examination (MMSE) score (≤26) the incidence was 37% (95% CI: 18–57), and in patients undergoing major surgery it was 18% (95% CI: 10.6–26). Of the cognitive domains, executive function was the most vulnerable to decline.ConclusionAbout half of the elderly patients show improvement in postoperative cognitive performance after oncological surgery, whereas 12% show cognitive decline. Advanced age, lower pre-operative MMSE score and major surgery are risk factors for cognitive decline at 3 months postoperatively and should be taken into account in the clinical decision-making progress. Research to develop interventions to preserve quality of life should focus on this high-risk subpopulation.
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