Table 3. Pulmonary function test and computed tomography among COVID-19 survivors according to disease severity.

	All of them (n = 108)	Mild/Moderate (n = 58)	Severe (n = 50)	P value
Days elapsed from symptom onset to test performance, median (p25; p75)	104.0 (90.5; 125.0)	104.5 (94.7; 127.0)	103.0 (88.5; 121.2)	0.273
Functional lung parameter and imaging CT
FVC (%), median (p25; p75) FVC >80%, n(%)	106.1 (93.2; 114.0)	105.0 (95.0; 114.5) 53 (91.4)	107.6 (91.0; 113.0) 47 (94.0)	0.671 0.722
FEV1 (%), median (p25; p75) FEV1 >80%, n (%)	104.5 (95.0; 113.5)	103.0 (94.7; 119.0) 54 (93.1)	105.0 (95.0; 113.0) 48 (96.0)	0.651 0.684
FEV1/FVC ratio, median (p25; p75)	1.0 (0.9; 1.0)	1.0 (0.9; 1.0)	1.0 (0.9; 1.1)	0.590
DLCO (%), median (p25; p75) DLCO <80%, n (%)	79.0 (71.5; 93.5)	87.0 (75.5; 100.5) 18 (34.6)	74.5 (65.0; 81.0) 34 (65.4)	0.001 <0.0001
6MWT distance, mean (± SD)	557.0 (492.6; 610.0)	570.0 (523.4; 632.5)	516.0 (452.7; 598.6)	0.036
Pathologic CT, n (%)	56 (52.8)	24 (42.1)	32 (65.3)	0.017

Note: 6MWT, 6-minute walk test; CT, chest-computed tomography; DLCO, diffusion capacity of the lung for carbon monoxide; FEV1, forced expiratory volume in the first second; FVC, forced vital capacity; SD, Standard deviation.