D-Dimer and Prothrombin Time Are the Significant Indicators of Severe COVID-19 and Poor Prognosis

Table 4

Correlation analysis between DD and chest CT in the same period.

The different stages of CT	DD
	<0.55	0.55-1.10	>1.10	Total
CT1
Normal	3	0	2	5
Mild	16	1	4	21
Progressive	29	10	16	55
Severe	17	4	13	34
Total	65	15	35	115
,
,
CT2
Normal	1	0	0	1
Mild	6	7	4	17
Progressive	16	14	23	53
Severe	1	2	23	26
Total	24	23	50	97
,
,
CT3
Normal	0	0	0	0
Mild	19	10	4	33
Progressive	10	4	13	27
Severe	1	2	5	8
Total	30	16	22	68
,
,