Unintentional Weight Loss as a Predictor of Adverse Prognosis in Older Adults With Chronic Obstructive Pulmonary Disease in the Intensive Care Unit: A Retrospective Cohort Study - Hongtao Cheng; Yonglan Tang; Shanyuan Tan; Simeng Song; Jia-Ming Xiong; Xiaxuan Huang; Yitong Ling; Zichen Wang; Fuling Zhou; Jun Lyu (Journal of the Academy of Nutrition and Dietetics, 2026)