Table 1.

The associations between the severity and myocardial injury indexes.

Parameters	Mild	Severe	Critically ill
Cases, N	213	90	52
CK (U/L)	70.0 (47.0, 101.0)	72.0 (47.3, 160.0)	149 (70.0, 319.0)**##
CKMB, N (%)	69 (33.7)	51 (59.3)	38 (74.5)*
LDH (U/L)	222.0 (186.0, 272.0)	299.0 (226.0, 370.0)**	442.0 (277.5, 630.3)**##
AST (U/L)	26.0 (20.0, 35.0)	29.0 (22.8, 54.0)*	49.0 (35.0, 80.0)**##
Tn (ng/mL)	0.01 (0, 0.02)	0.04 (0.02, 0.06)*	0.07 (0.05, 0.12)**##
Myocardial injury cases (%)	22 (10.3)	19 (21.1)*	18 (34.6)**#

Compared with “Mild”,

^*P < 0.05,

^**P < 0.01;

Compared with “Severe”,

^#P < 0.05,

^##P < 0.01.

Myocardial injury was defined as troponin beyond normal range.