1808PTaste and smell alterations (TSAs) in patients (pts) with stage II-III colon cancer (CC): A pilot within the PROTECT study

Abstract Background TSAs are common side effects among cancer pts undergoing chemotherapy and may lead to inadequate dietary intake and reduced quality of life. Here, we investigate the incidence of multiple components of self-reported TSAs and its etiological determinants in a homogeneous group of pts with stage II-III CC. Methods We used data collected in an ongoing observational study within the Prospective Dutch Colorectal Cancer Cohort, designed to study nutritional factors and oncological outcomes. Pts receive questionnaires on dietary intake by food-frequency questionnaire (past month average intake), dietary supplement use and TSAs at diagnosis (T0), and at 6, 12, 24 months post-diagnosis. Here, we selected pts with stage II-III CC, with completed T6 questionnaires and available clinical data. Results We included 87/468 pts for analysis (updated for ESMO) with a mean age 64.0±7.6 years, 70% male and 70% current/former smokers. Adjuvant chemotherapy (ACT), received by 52% of pts, consisted of CAPOX (90%), FOLFOX (5%), or CAP (5%) as initial regimen. TSAs were reported at T0 (4% of pts) and at T6 (32% of pts). TSA presence was significantly related to receiving ACT (RR 13.8, 95%CI: 3.5-54.3), but not to age, sex, education and smoking status. ACT treated pts more often reported a change in taste ability (49%, p  Conclusions TSAs are more prevalent in CC pts who received ACT compared to pts who did not, with taste more affected than smell. Pts had caloric intake below guideline recommendations at T6. The influence of TSAs on caloric intake appears to be limited when caloric intake is already insufficient. More pts, follow-up, and data on macronutrients and quality of life are needed to confirm and enrich these preliminary findings and ultimately help improve supportive care. Legal entity responsible for the study University Medical Center Utrecht. Funding Province of Utrecht, The Netherlands. Disclosure B. Dorresteijn: Full / Part-time employment: Danone Nutricia Research. M. Jourdan: Full / Part-time employment: Danone Nutricia Research. All other authors have declared no conflicts of interest.