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Table 2 Results of systematic review with cohort studies of COVID-19 patients—chest CT

From: Radiological and functional lung sequelae of COVID-19: a systematic review and meta-analysis

Author Follow-up timing of latest tests Cohort Size, N Residual CT abnormalities % (N) Parenchymal band or fibrous stripe % (N) GGO % (N) Consolidation % (N) Interstitial thickening or interlobular septal thickening % (N) Bronchovascular bundle distortion or bronchiectasis % (N) Thickening of adjacent pleura % (N) Pleural effusion % (N) Crazy paving % (N)
You [17] PFT
Non-severe cases: 40 ± 11.6 days
Severe cases: 34.7 ± 16.5 days
CT was taken closest to the date of PFT
18 83% (15) NA 61.1% (11) NA NA NA NA NA NA
Huang [18] 30 days after discharge 57 54.4% (31) NA NA NA NA NA NA NA NA
Liu [19] 31 (20–37) days after discharge 51 35.3% (18) NA 33.3% (17) 2.0% (1) 35.3% (18) 3.9% (2) 23.5% (12) NA NA
Zhao [20] 64–93 days after discharge 55 70.9% (39) NA 12.7% (7) NA 27.3% (15) NA 41.8% (23) 1.8% (1) 5.5% (3)
Zhong [21] 39.6 ± 6.0 days after symptom onset
19.7 ± 4.1 days after discharge
52 69.2% (36) 36.5% (19) 63.5% (33) 9.6% (5) 5.8% (3) 7.7% (4) NA NA NA
Liang [22] 3 months after discharge 21 23.8% (5) NA 23.8% (5) NA NA NA NA NA NA
Tabatabaei [23] 91 ± 15.5 days after initial CT 52 42.3% (22) 19.2% (10) 36.5% (19) NA NA NA NA NA NA
van den Borst [24] 13.0 ± 2.2 weeks after symptom onset
9.1 ± 1.6 weeks after discharge
84 90.5% (76) 64.3% (54) 86.9% (73) NA NA 60.7% (51) NA NA NA
Smet [25] 74 ± 12 days after diagnosis 220 26.4% (58) NA 25.0% (55) 3.6% (8) NA NA NA NA 40.9% (90)
Lerum [27] 83 [73, 90] days after hospital admission 103 NA 18.4% (19) 23.3% (24) NA NA NA NA NA NA
Huang [29] 186 [175, 199] days after symptom onset 353 52.7% (186) 15.9% (56) 44.8% (158) 1.1% (4) 0.8% (3) NA 4.2% (15) NA NA
Guler [30] 128 [108, 144] days after symptom onset 52 NA 51.9% (27) 57.7%(30) 28.8% (15) 1.9% (1) 38.5% (20) 1.9% (1) NA NA
Han [31] 175 ± 20 days after symptom onset 114 62.3% (71) NA 62.3% (71) 23.7% (27) NA 10.5% (12) 35.1% (40) 8.8% (10) NA
  1. Value is shown as mean ± SD or median [Q1, Q3]. Abbreviations: CT computed tomography, GGO ground glass appearance, NA non-applicable, PFT pulmonary function test. Studies are in order of publication date.