{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T16:05:28Z","timestamp":1790697928064,"version":"4.1.0"},"reference-count":33,"publisher":"American Medical Association (AMA)","issue":"9","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JAMA Netw Open"],"abstract":"\n Importance<\/jats:title>\n South Korea\u2019s 2018 Life-Sustaining Treatment Decisions (LSTD) Act was enacted to promote patient autonomy, yet its impact on systemic antibiotic utilization near the end of life in patients with advanced cancer remains unexplored.<\/jats:p>\n <\/jats:sec>\n \n Objective<\/jats:title>\n To evaluate shifts in systemic antibiotic use among end-of-life patients with advanced cancer following the LSTD Act.<\/jats:p>\n <\/jats:sec>\n \n Design, Setting, and Participants<\/jats:title>\n This cohort study used the National Health Insurance Service database to evaluate decedents with 8 major advanced cancers (lung, liver, stomach, colorectal, pancreatic, prostate, gallbladder or biliary tract, and breast). Inverse probability of treatment weighting was performed to balance cancer types, comorbidities, and demographic characteristics. Data were collected and analyzed between October 2025 and February 2026.<\/jats:p>\n <\/jats:sec>\n \n Exposures<\/jats:title>\n Implementation of the LSTD Act, comparing the pre\u2013LSTD Act (2012-2017) and post\u2013LSTD Act (2018-2023) eras.<\/jats:p>\n <\/jats:sec>\n \n Main Outcomes and Measures<\/jats:title>\n The primary outcomes were antibiotic prescription proportion and days of therapy (DOT) per 1000 patient-days during the final 6 months of life. Broad-spectrum antibiotics, defined as antipseudomonal \u03b2-lactams, carbapenems, or glycopeptides, were separately analyzed. The utilization patterns were evaluated across 5 predefined intervals using odds ratios and risk ratios. A seasonally adjusted monthly interrupted time-series analysis was performed to characterize the longitudinal shifts in DOT during the final months of life.<\/jats:p>\n <\/jats:sec>\n \n Results<\/jats:title>\n \n A total of 743 842 eligible decedents (mean [SD] age, 71.9 [12.2] years; 487 690 male [65.6%]) were evaluated, including 348 813 in the pre\u2013LSTD Act era and 395 029 in the post\u2013LSTD Act era. During the final 6 months of life, the overall prescription proportion increased from 88.3% to 90.8% (odds ratio, 1.34; 95% CI, 1.32-1.37), widening particularly in the final 3 months. Similarly, total antibiotic DOT showed a significant overall increase from 231.4 to 261.6 per 1000 patient-days (risk ratio, 1.14; 95% CI, 1.13-1.14) across all intervals. These 2 measures showed comparable trends across broad-spectrum antibiotics and other classes. Monthly interrupted time-series analysis revealed a significant postenactment slope increase in overall antibiotic DOTs (\u03b2\u2009=\u20090.94; 95% CI, 0.67-1.21;\n P<\/jats:italic>\n \u2009&amp;lt;\u2009.001), driven largely by other antibiotics alongside the ongoing increase in broad-spectrum antibiotics.\n <\/jats:p>\n <\/jats:sec>\n \n Conclusions and Relevance<\/jats:title>\n In this retrospective cohort study of patients with advanced cancer, the LSTD Act was not associated with reduced end-of-life antibiotic use, suggesting the need to reshape perceptions of antibiotics as potential life-sustaining therapy.<\/jats:p>\n <\/jats:sec>","DOI":"10.1001\/jamanetworkopen.2026.36508","type":"journal-article","created":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T15:30:28Z","timestamp":1790695828000},"page":"e2636508","source":"Crossref","is-referenced-by-count":0,"title":["End-of-Life Antibiotic Use After the Life-Sustaining Treatment Decisions Act in Korea"],"prefix":"10.1001","volume":"9","author":[{"given":"Jin-Ah","family":"Sim","sequence":"first","affiliation":[{"name":"Graduate School of Public Health and Healthcare Management, The Catholic University of Korea, Seoul, South Korea"},{"name":"Department of Population and Quantitative Health Sciences, UMass Chan Medical School, Worcester, Massachusetts"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wantaek","family":"Lee","sequence":"additional","affiliation":[{"name":"Graduate School of Public Health and Healthcare Management, The Catholic University of Korea, Seoul, South Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jung Soo","family":"Son","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine, Seoul National University Hospital, Seoul, South Korea"},{"name":"Center for Palliative Care and Clinical Ethics, Seoul National University Hospital, Seoul, South 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