id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-263735-sos2ovng	Li, K.	Diagnostic performance of CT and its key signs for COVID-19: A systematic review and meta-analysis	2020-05-26		.txt	text/plain	5251	310	69	Furthermore, several studies reported that CT had high sensitivity for COVID-19 [7, 9, 10] , but a recent study including 121 cases found 56% of patients had a normal CT finding in the early stage of infection [11] . Furthermore, there are 10 studies reported the diagnostic sensitivity of the initial PCR assay [7, 10, 11, 18, 22, 29, 32, [34] [35] [36] , while 5 of them mentioned the rate of missed diagnosis after the second tests [10, 22, 29, 32, 35] . For these 25 studies, the diagnostic sensitivity and specificity of CT for COVID-19 ranged from 69% to 100% and from 0% to 96%, with pooled estimates of 93% (95% CI, 89-96%) and 44% (95% CI, 27-62%) (Figure 4 ), respectively. For the 10 studies with repeated PCR assay, the pooled sensitivity of the initial RT-PCR test in diagnosis of COVID-19 was 76% (95% CI: 59-89%; I 2 =96%).	./cache/cord-263735-sos2ovng.txt	./txt/cord-263735-sos2ovng.txt