id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-257870-b52k75m4	Chen, Qianqian	Carcinoembryonic Antigen: A Potential Biomarker to Evaluate the Severity and Prognosis of COVID-19	2020-10-06		.txt	text/plain	3851	203	46	The standardized and weighted receiver operating characteristic curve (ROC) analysis adjusted to age, sex, and ferritin levels suggested that the area under the curve (AUC) of the serum CEA levels was 0.808 in discrimination between death cases and discharged cases with COVID-19 (P < 0.001). Among discharged patients, CEA levels were significant lower in moderate cases compared to the severe and critical cases (P = 0.005; OR = 0.488, 95% CI: 0.294–0.808) from binary logistic regression analysis. All patients included met the following inclusion criteria: Confirmed COVID-19 cases was diagnosed by real-time fluorescent reverse transcription-polymerase chain reaction (RT-PCR) based on "Diagnosis and Treatment Protocol for Novel Coronavirus Pneumonia (Trial Version 7)" published by the National Health Commission of the People's Republic of China (20) . This study validated the previous result that CEA levels were related to severity of COVID-19 reported by different research groups (Union Hospital of Tongji Medical College, Wuhan) (19) .	./cache/cord-257870-b52k75m4.txt	./txt/cord-257870-b52k75m4.txt