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Table 2 Lung function, dyspnea, quality of life, and chest CT assessments in COVID-19 patients 3 months after ICU discharge

From: Post-discharge critical COVID-19 lung function related to severity of radiologic lung involvement at admission

Pulmonary function test, n = 22
(mean ± SD)
FEV1 (L) 2.88 ± 0.66
  FEV1 (%) 89.4 ± 15.7
  FVC (L) 3.38 ± 0.81
  FVC (%) 83.64 ± 16.9
  FEV1/FCV 0.86 ± 0.06
  DLCO (%) 80.7 ± 14.3
PFT interpretation Normal
Restrictive pattern
Restrictive + altered diffusion
Altered diffusion
n = 10
n = 2
n = 4
n = 6
6MWDT, n = 20
(mean ± SD)
Distance (m) 514.4 ± 93.1
Distance (%) 73.5 ± 12.3
Distance < 80% n = 13
Desaturation n = 6
Respiratory muscle strength, n = 21
(mean ± SD)
MIP (cm H2O) 85.7 ± 24.9
MIP (%) 81.8 ± 15.2
MIP < 80% n = 9
MEP (cm H2O) 102.8 ± 32.3
MEP (%) 66.1 ± 30.7
MEP < 80% n = 17
MMRC, n = 21, mean ± SD 0.7 ± 1.7
SF-36, n = 22 (mean ± SD) Physical functioning 70.79 ± 21.30
Role physical 33.82 ± 37.44
Pain 64.60 ± 26.61
General health 59.90 ± 17.62
Vitality 56.84 ± 16.68
Social 69.38 ± 22.02
Role emotional 38.61 ± 48.77
Mental health 69.68 ± 16.99
Chest CT Scan, n = 22 Baseline 3-months
Normal n = 0 n = 3
Number of affected segments in both lungs (mean ± SD), score/20 17.2 ± 19 8.1 ± 10.1
Predominant abnormalities   
 Ground glass opacities n = 22 n = 0
 Consolidation n = 16 n = 2
 Fibrosis n = 9 n = 19
Abnormalities distribution   
 Peripheral location n = 8 n = 7
 Diffuse location n = 14 n = 12
 Lower lobes predominant involvement n = 12 n = 11
  1. SF-36: Short Form 36 questionnaire, mMRC: modified Medical Research Council dyspnea scale, ICU: intensive care unit, FEV1: forced expiratory volume in 1 s, FVC: forced vital capacity, DLCO: Diffusion capacity of the lung for carbon monoxide, MIP:maximum inspiratory pressure, MEP: maximum expiratory pressure