id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-004299-ydm6j046	Lu, Yifang	New-onset atrial fibrillation can be falsely associated with increased length of stay in ICU due to immortal time bias	2020-02-06		.txt	text/plain	947	52	54	title: New-onset atrial fibrillation can be falsely associated with increased length of stay in ICU due to immortal time bias New-onset atrial fibrillation can be falsely associated with increased length of stay in ICU due to immortal time bias Yifang Lu 1 and Tenggao Chen 2* Dear editor, In a recent study published in Critical Care, Fernando SM and colleagues investigated the impact of new-onset atrial fibrillation (NOAF) on clinical outcomes in critically ill patients [1] . The authors would like to thank Drs. Lu and Chen for their comments on our recent article related to outcomes and costs associated with new-onset atrial fibrillation (NOAF) in critically ill adults [1] . Drs. Lu and Chen suggest caution in the interpretation of our study results, particularly as they relate to the length of stay and costs, due to the possibility of immortal time bias.	./cache/cord-004299-ydm6j046.txt	./txt/cord-004299-ydm6j046.txt