The association between sarcopenia and quality of life in patients undergoing colorectal cancer surgery: an...

To describe changes in health-related quality of life (QoL) from before colorectal cancer (CRC) surgery to 1 and 3-month post-surgery in patients diagnosed pre-operatively as sarcopenic or non-sarcopenic by computed tomography (CT) analysis.

Secondary analysis of a prospective observational cohort study with one pre-operative and two post-operative assessments. Patient-reported outcome measures (PROMs) were collected at each timepoint using Functional Assessment of Cancer Therapy-Colorectal and the EuroQol-5D (EQ-5D) questionnaires. Pre-operative staging CT scans of the third lumbar vertebra (axial slice) were analysed using Slice-O-Matic Software to determine if patients had CT defined sarcopenia by employing sex-specific threshold values for skeletal muscle index. Patient-reported outcome measure scores were compared with minimal clinical important difference estimates to determine if changes were clinically significant.

Twenty-five of 40 patients were found to be sarcopenic. The difference between sarcopenic groups on the EQ-5D was medium-sized and clinically significant, with the sarcopenic group reporting lower health status. The non-sarcopenic group displayed a clinically significant reduction in physical wellbeing post-operatively. The sarcopenic group did not demonstrate a clinically important reduction in physical wellbeing. For functional wellbeing, the sarcopenic group recorded a clinically significant reduction at the 1-month timepoint, trending back towards baseline by the 3-month timepoint. The non-sarcopenic group recorded almost no change in functional scores.

This study explored the novel concept of the effect of sarcopenia on QoL in the CRC surgical setting. Clinically significant changes were identified at both post-operative timepoints. This highlights an important proof of concept that PROMs can detect meaningful clinical change in CRC patients in the context of sarcopenia and should be further explored.