Clare Fong, Wern Lunn Kueh, Sennen Jin Wen Lew, Benjamin Choon Heng Ho, Yu-Lin Wong, Yie Hui Lau, Yew Woon Chia, Hui Ling Tan, Ying Hao Christopher Seet, Wen Ting Siow, Graeme MacLaren, Rohit Agrawal, Tian Jin Lim, Shir Lynn Lim, Toon Wei Lim, Vui Kian Ho, Chai Rick Soh, Duu Wen Sewa, Chian Min Loo, Faheem Ahmed Khan, Chee Keat Tan, Roshni Sadashiv Gokhale, Chuin Siau, Noelle Louise Siew Hua Lim, Chik-Foo Yim, Jonathen Venkatachalam, Kumaresh Venkatesan, Naville Chi Hock Chia, Mei Fong Liew, Guihong Li, Li Li, Su Mon Myat, Zena Zena, Shuling Zhuo, Ling Ling Yueh, Caroline Shu Fang Tan, Jing Ma, Siew Lian Yeo, Yiong Huak Chan, Jason Phua, and for SICM-NICER group
Abstract Background Clinical practice guidelines on limitation of life-sustaining treatments (LST) in the intensive care unit (ICU), in the form of withholding or withdrawal of LST, state that there is no ethical difference between the two. Such statements are not uniformly accepted worldwide, and there are few studies on LST limitation in Asia. This study aimed to evaluate the predictors and outcomes of withholding and withdrawal of LST in Singapore, focusing on the similarities and differences between the two approaches. Methods This was a multicentre observational study of patients admitted to 21 adult ICUs across 9 public hospitals in Singapore over an average of three months per year from 2014 to 2019. The primary outcome measures were withholding and withdrawal of LST (cardiopulmonary resuscitation, invasive mechanical ventilation, and vasopressors/inotropes). The secondary outcome measure was hospital mortality. Multivariable generalised mixed model analysis was used to identify independent predictors for withdrawal and withholding of LST and if LST limitation predicts hospital mortality. Results There were 8907 patients and 9723 admissions. Of the former, 80.8% had no limitation of LST, 13.0% had LST withheld, and 6.2% had LST withdrawn. Common independent predictors for withholding and withdrawal were increasing age, absence of chronic kidney dialysis, greater dependence in activities of daily living, cardiopulmonary resuscitation before ICU admission, higher Acute Physiology and Chronic Health Evaluation (APACHE) II score, and higher level of care in the first 24 h of ICU admission. Additional predictors for withholding included being of Chinese race, the religions of Hinduism and Islam, malignancy, and chronic liver failure. The additional predictor for withdrawal was lower hospital paying class (with greater government subsidy for hospital bills). Hospital mortality in patients without LST limitation, with LST withholding, and with LST withdrawal was 10.6%, 82.1%, and 91.8%, respectively (p