Aspirin use in relation to long-term survival after gastrectomy for gastric adenocarcinoma.

"Declarations Conflict of interestThe authors declare no conflict of interest. Conflict of interest The authors declare no conflict of interest."

"Funding Open access funding provided by Karolinska Institutet. The study was supported by the Swedish Research Council, Swedish Cancer Society, and Stockholm Cancer Society."

"This was a nationwide Swedish population-based cohort study, titled the Swedish Gastric Cancer Surgery Study (SWEGASS), which has been presented in detail in a recent cohort description []. The cohort included 98% of all patients having undergone gastrectomy for gastric adenocarcinoma (including Siewert type III tumours of the gastric cardia) in Sweden from July 1, 2006 to December 31, 2015 and for the purpose of the present study, the follow-up was updated until December 31, 2020. Potentially eligible patients were initially identified in the Swedish Cancer Registry and Swedish Patient Registry by the disease, histopathology and surgery codes defining gastric adenocarcinoma and gastrectomy. The final cohort was then selected after a review of medical records from all patients, including notes from histopathology reports, multidisciplinary meetings, surgery and hospital discharge []. The study was approved by the Regional Ethical Review Board in Stockholm, Sweden (registration number 2017/141-31/2)."