Abstract
Introduction: Preoperative frailty is a key determinant of post-surgical outcomes and often co-exists with sarcopenia and malnutrition. Older patients account for a significant proportion of patients undergoing surgery for colorectal cancer and are therefore more likely to be affected by these risk factors.
Methods: Patients aged 65 and over undergoing planned surgery for colorectal cancer were recruited across five sites. Participants were screened preoperatively using the Clinical Frailty Scale (CFS) and Groningen Frailty Indicator (GFI). Nutritional status was assessed using the short form mini nutritional assessment (MNA-SF) and participant collection of spot urine samples to objectively measure habitual dietary intake. Sarcopenia was assessed through grip strength, gait speed and psoas muscle measurement using preoperative CT imaging. The non-radiological screening measures were repeated eight-weeks postoperatively, with additional urine samples collected in the first and fourth weeks.
Results: Forty-three participants (mean age 76 years, 60 % male) were recruited, of which 32% were frail. Using the mini-nutritional assessment 42 % of participants were identified as at risk of malnutrition and 9 % as malnourished. Urine assessment of habitual dietary intake is ongoing. There was a high prevalence of sarcopenia - 67 % determined by hand grip strength and 42% by CT analysis. Mean length of stay following surgery was 6.9 days. 28 % of participants were unable to complete the in-person post-operative follow up due to ill health, poor appetite and exhaustion.
Conclusions: This ongoing study has demonstrated the feasibility of incorporating frailty, nutritional status and sarcopenia screening alongside routine clinical care, in older adults undergoing surgery. However, retaining participants in observational studies during postoperative periods of convalescence, or whilst undergoing adjuvant treatment, is challenging. This study has also highlighted the potential of home urine sampling as a viable method of dietary assessment within community settings to aid malnutrition screening.