Table 1.

Baseline characteristics

Characteristics	Reference range	Total COVID-19 (n = 25)	hs-TnI (+, n = 8)	hs-TnI (−, n = 17)	P
Age (years)	–	23 (18–33.5)	20.5 (19–27)	27 (18–42.5)	0.56
Male	–	15 (60%)	5 (62.5%)	10 (58.8%)	0.60
Fever	–	14 (56%)	3 (37.5%)	11 (67.7%)	0.39
PT (°C)	–	37.4 ± 0.9	37.2 ± 0.9	37.5 ± 1	0.59
Cough	–	13 (52%)	4 (50%)	9 (52.9%)	0.61
Palpitation		3 (12%)	2 (25%)	1 (5.9%)	0.23
CMRTime days		6.7 ± 5.7	5.5 ± 1.7	6.1 ± 3.1	0.64
Inpatient days	–	19 (15–24)	22.5 (16–25.8)	17 (14.5–23)	0.24
Smoking history	–	2 (8%)	1 (12.5%)	1 (5.9%)	0.55
History of alcohol	–	2 (8%)	1 (12.5%)	1 (5.9%)	0.55
Comorbidity	–	4 (16%)	1 (12.5%)	3 (17.6%)	0.62
CK (U/L)	29–168	72 (63.5–120)	67.5 (63–115.3)	79 (65.5–123.5)	0.48
CK-MB (ng/mL)	0–24	12 ± 2.3	12.2 ± 2	11.9 ± 2.5	0.72
LDH (mmol/L)	120–250	186 (176–209.5)	181 (173.3–202.5)	187 (177–239.5)	0.24
Pro-BNP (pg/mL)	0–250	25.1 (16.2–71.7)	27.1 (17.6–86.3)	23 (14.6–62.8)	0.55
WBC (/L)	3.5–9.5	4.8 (3.9–6.7)	4.9 (4.6–5.9)	4.8 (3.6–7.4)	0.81
Neutrophil (/L)	1.8–6.3	3 (2.1–3.1)	2.7 (2.2–3.6)	3.1 (1.8–4.7)	0.66
Leukocytes (/L)	1.1–3.2	1.3 (1.1–1.7)	1.7 (0.9–1.7)	1.3 (1.1–1.7)	0.51
CT pneumonia	–	17 (68%)	4 (50%)	13 (76.5%)	0.36
Abnormal ECG	–	19 (56%)	7 (87.5%)	12 (70.6%)	0.62
PE	–	7 (28%)	5 (62.5%)	2 (11.8%)	0.020
Clinical severity
Mild		18 (72%)	3 (37.5%)	15 (88.2%)	0.020
Moderate		7 (28%)	5 (62.5%)	2 (11.8%)

Numbers are given as median (interquartile ranges) or mean ± standard deviation or as absolute frequency with percentages in parentheses. hs-TnI (−): 0–0.04 (pg/mL).

CMRTime, Time duration between onset of symptoms to CMR scan; CK, creatine kinase; CK-MB, Creatinine kinase-myocardial band; ECG, Electrocardiograph; hs-TnI, high-sensitivity troponin I; LDH, Lactate dehydrogenase; Pro-BNP, pro-B-type natriuretic peptide; PT, Peak temperature; Total, total patients with COVID-19; WBC, white blood cell.. P values represent the comparison between hs-TnI (+) and hs-TnI (−).