Table 1 Demographics and cardiovascular magnetic resonance (CMR) data among COVID-19 + soldiers (soldier cases) compared to healthy soldier controls

Age, median (IQR), years

26.5 (23, 31)

25 (23, 33)

0.82

Height, cm

178 (175, 183)^a

177 (173, 185)

0.95

Weight, kg

87 (78, 99)^a

86 (75, 98)

0.83

Body surface area, kg/m²

2.1 (2.0, 2.2)^b

2.1 (1.9, 2.2)

0.80

Gender, male

49 (98%)

49 (98%)

0.75

Active duty

49 (98%)

49 (98%)

1.00

Creatinine, mg/dL

0.9 (0.9, 1.0)^c

1.1 (1.0, 1.2)^c

n/a

Hematocrit, %

44 (43, 46)^a

42 (41, 44)^d

n/a

Acute cardiovascular symptoms, N, %

42 (86%)

n/a

n/a

(*Convalescent) CV symptoms

46 (94%)

n/a

 Dyspnea on exertion

41 (84%)

3 (6%)

 < 0.001

 Chest pain

35 (71%)

21 (42%)

0.005

 Palpitations

9 (18%)

6 (12%)

0.401

COVID-19 severity N (%)

 Mild (no CV symptoms)

2 (4%)

n/a

n/a

 Moderate (CV symptoms)

42 (86%)

n/a

 Severe (hospitalized)

3 (6%)

 Severe (ICU)

2 (4%)

CV PASC

 Survey completion, N, %

19 (39%)

n/a

n/a

 Median time to survey (days)

91

 Ongoing CV symptoms

6 (32%)

Laboratory

 Troponin I > 99%

2 (4%)^a

0 (0%)^e

n/a

 Abnormal ECG

4 (8.5%)^a

9 (28%)^f

0.05

 Hematocrit

44 (43, 45)^c

42 (41, 43)^d

0.06