Outcomes following colorectal cancer surgery: Results from a population-based study in Queensland, Australia, using quality indicators.

RATIONALE, AIMS AND OBJECTIVES: Colorectal cancer (CRC) is one of the most common cancers diagnosed worldwide, and rates are continuing to rise. Surgery is the primary treatment for CRC, and our aim was to examine clinical outcomes following major resection using a series of established quality indicators and to identify factors associated with poor clinical outcomes.

METHOD: This population-based retrospective study included 4321 patients with diagnosed with CRC in 2012 and 2014 in Queensland, Australia, who underwent a major resection. Primary outcomes included in-hospital mortality, 30-day unplanned readmission, extended hospital stay (>21 days), and 30- and 90-day mortality. Multivariable logistic regression modelling was conducted to establish factors independently associated with each outcome of interest.

RESULTS: Overall, in-hospital mortality was 1.5%, 3.0% had an unplanned readmission, 8% had an extended hospital stay, and 30- and 90-day postoperative mortality was 1.6% and 3.1%, respectively. After adjustment, we found that factors such as older age, presence of comorbidities, emergency admission, and stoma formation were significantly associated with poorer outcomes with these findings being consistent across each of the outcomes of interest. In addition to these factors, the risk of 90-day mortality was significantly elevated for patients with advanced stage disease (OR = 1.95, CI 1.35-2.82). Sex, primary site, hospital volume, residential location, nor socioeconomic status was found to be associated with any of the outcomes of interest.

CONCLUSION: Overall, the risk of poorer clinical outcomes for CRC patients in Queensland, Australia, is low. There is however a subgroup of patients at particularly elevated risk of poorer outcomes following CRC. Strategies to reduce the poorer clinical outcomes this group of patients experience should be explored.