Table 2 Prevalence of 6 months persisting symptoms and serum biomarkers.

Total patients, n (%)

248 (100%)

172 (69.4%)

76 (30.6%)

Any symptom, n (%)

119 (48.0%)

90 (52.3%)

29 (38.2%)

p = 0.040

Chest symptoms, n (%)

67 (27.0%)

55 (32.0%)

12 (15.8%)

p = 0.008

Dyspnoea, n (%)

51 (20.6%)

43 (25.0%)

8 (10.5%)

p = 0.010

Grade MMRC 1, n (%)

43 (17.3%)

36 (20.9%)

7 (0.9%)

p = 0.029

Grade MMRC 2, n (%)

8 (3.2%)

7 (4.1%)

1 (1.3%)

p = 0.441

Chest pain, n (%)

15 (6.0%)

11 (6.4%)

4 (5.3%)

p = 0.444

Cough, n (%)

11 (4.4%)

10 (5.8%)

1 (1.3%)

p = 0.673

Extra-thoracic symptoms, n (%)

97 (39.1%)

74 (43.0%)

23 (30.3%)

p = 0.058

Digestive symptoms, n (%)

10 (4.0%)

7 (4.1%)

3 (3.9%)

p = 0.999

Abdominal pain, n (%)

7 (2.8%)

5 (2.9%)

2 (2.6%)

p = 1.000

Diarrhoea, n (%)

4 (1.6%)

3 (1.7%)

1 (1.3%)

p = 1.000

Musculoskeletal symptoms, n (%)

18 (7.3%)

16 (9.3%)

2 (2.6%)

p = 0.068

Myalgia, n (%)

10 (4.0%)

10 (5.8%)

0

p = 0.034

Arthralgia, n (%)

12 (4.8%)

10 (5.8%)

2 (2.6%)

p = 0.354

Fatigue, n (%)

40 (16.1%)

36 (20.9%)

4 (5.3%)

p = 0.001

Anosmia, n (%)

17 (6.9%)

9 (5.2%)

8 (10.5%)

p = 0.054

Ageusia, n (%)

10 (4.0%)

5 (2.9%)

5 (6.6%)

p = 0.181

Headache, n (%)

12 (4.8%)

6 (3.5%)

6 (8.0%)

p = 0.196

Brain fog, n (%)

9 (3.6%)

9 (5.2%)

0

p = 0.061

Mood disorder, n (%)

10 (4.0%)

5 (2.9%)

5 (6.6%)

p = 0.396

Hair loss, n (%)

18 (7.3%)

16 (9.3%)

2 (2.6%)

p = 0.068

Sleep disorder, n (%)

9 (3.6%)

9 (5.2%)

0

p = 0.061

Conjunctival chemosis, n (%)

1 (0.4%)

1 (0.6%)

0

p = 1.000

Serum biomarkers

CRP, median (mg/dL), IQR

0.93 (2.83)

1.19 (3.40)

0.35 (1.70)

p = 0.001

LDH, median (IU/L), IQR

189.0 (43.0)

176.5 (33.0)

192.0 (41.0)

p < 0.001

Ferritin, median (ng/mL), IQR

78.0 (108.0)

82.0 (107.0)

74.0 (109.0)

p = 0.486