AIM: This study aimed to estimate the impact of socioeconomic status on the probability of receiving open (OPEN) or minimally invasive surgery (MIS) for curative abdominal rectal cancer resection. METHODS: All patients diagnosed with rectal cancer clinical Stage I-III during the period 2010-2021 who underwent curative abdominal resection surgery, MIS or OPEN, were included. Patients were identified in the Colorectal Cancer Database, a register-linkage based on the Swedish Colorectal Cancer Register and linked to several national Swedish health-related and demographic registers. Socioeconomic factors, sex, patient and tumour characteristics, number of previous surgical procedures and category of hospital were collected. Exposures were level of education (categorized as 6-9, 10-12, >
12 years), household income (quartiles 1-4) and country of birth (Sweden, Nordic countries outside Sweden, Europe outside the Nordic countries, outside Europe), and outcome was MIS or OPEN. Multivariable logistic regression models were fitted for each exposure, adjusted for age, sex, cT and cN, level of tumour, and number of previous abdominal surgical procedures. RESULTS: A total of 13 778 patients were included of whom 43.6% underwent MIS (n = 6007) and 56.4% OPEN (n = 7771). Highest level of education (OR for highest vs. lowest level of education 1.15
95% CI 1.03-1.29) and highest household income quartile (OR for highest vs. lowest household income quartile 1.27
95% CI 1.12-1.44) increased the likelihood of receiving MIS. CONCLUSION: Despite the tax-financed healthcare system in Sweden, rectal cancer patients with the highest level of education and the highest household income had an increased probability of receiving MIS.