1. United Nations, Department of Economic and Social Affairs, Population Division. World population ageing 2019: highlights. New York: United Nations; 2019.
3. Kim KW, Kim OS. Super aging in South Korea unstoppable but mitigatable: a sub-national scale population projection for best policy planning. Spat Demogr. 2020; 8:155–73.
Article
4. Al-Dorzi HM, Tamim HM, Mundekkadan S, Sohail MR, Arabi YM. Characteristics, management and outcomes of critically ill patients who are 80 years and older: a retrospective comparative cohort study. BMC Anesthesiol. 2014; 14:126.
Article
5. Lee SI, Koh Y, Huh JW, Hong SB, Lim CM. Characteristics and prognostic factors of very elderly patients admitted to the intensive care unit. Acute Crit Care. 2022; 37:372–81.
Article