“…First, this study has sufficient median follow-up duration, 77.3 months in ASA-PS group 1/2 and 67.8 months in ASA-PS group 3, compared with previous studies (33.4-64.0 months) [8,10,11]. Secondly, this study also has a large sample size when Table 2 The cause of death and adverse events before and after propensity score matching Other cancers were detected during the follow-up period after ESD, although patients with history of another malignancy before ESD were excluded ASA-PS American Society of Anesthesiologist Physical Status, pulmonary disease (pneumonia, interstitial pneumonia, respiratory failure), cardiovascular disease (heart failure, ischemic heart disease, aortic dissection), cerebrovascular disease (hemorrhage, infarction), Other types of cancers (after ESD) (colon, lung, liver, bile duct), other diseases (esophageal varix rupture, acute peritonitis, hypoglycemia, senility, accident) a The number of patients who contracted each disease as a comorbidity on treatment and died of the same disease Before matching (n = 488) After matching (n = 178) compared to previous reports [8,10,11]. Thirdly, we demonstrated that the ASA-PS group 3 was an independent risk factor for overall mortality and resulted in shorter patient survival when adjusted for other confounding factors using propensity score matching and IPTW methods.…”