id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-012665-fflye8a3	Marques-Vidal, Pedro	Statistical issues regarding the article by Liu et al.	2020-09-02		.txt	text/plain	241	29	82	key: cord-012665-fflye8a3 title: Statistical issues regarding the article by Liu et al. cord_uid: fflye8a3 I read with interest the article by Liu et al. [1] on the effect of malnutrition status among elderly patients with COVID-19. I have some questions regarding the analysis of the data. • For each patient, four nutritional risk scores were computed. Comparing the prevalence of "at risk" patients between scores cannot be performed by simple chi-square, as the data come from the same sample (i.e., the data is not independent). It seems that the authors computed the OR for the non-at risk patients. Recomputing the OR leads to a value of 9.80, which is more compatible with the effects of malnutrition on increased LOS. • I am surprised that p values of zero are presented. Clinical significance of nutritional risk screening for older adult patients with COVID-19	./cache/cord-012665-fflye8a3.txt	./txt/cord-012665-fflye8a3.txt