Three-month follow-up after severe COVID-19 infection: are chest CT results associated with respiratory outcomes and respiratory recovery in COVID-19 patients?

Table 2 CT-severity score and oxygen suppletion during hospitalization

	Range CT-SS (minimum-maximum)	Mean CT-SS Mean (SD)	P-value *
WHO score baseline†			P = 0.022
- 4: hospitalisation, requiring oxygen (N = 87)	6.5–24.0	14.7 (3.7)
- 5: hospitalisation, requiring high-flow nasal oxygen therapy or non-invasive ventilation (N = 14)	11.0–22.5	16.9 (3.4)
- 6: hospitalisation, requiring ECMO, invasive mechanical ventilation or both (N = 7)	12.0–23.0	17.8 (4.0)
Maximum oxygen suppletion during the whole hospitalization			P < 0.001
- Nasal oxygen (N = 42)	6.5–22.5	13.6 (3.1)
- Oxymask/NRM (N = 23)	9.0–23.0	14.8 (3.7)
- High flow nasal cannula (N = 19)	8.0–19.0	15.32 (3.2)
- Mechanical ventilation (N = 24)	11.5–24.0	18.23 (3.7)

†WHO score: The WHO score consists of 7 stages which are: (1) non-hospitalized, able to resume normal activities; (2) non-hospitalized, but unable to resume normal activities; (3) hospitalized, not requiring oxygen therapy; (4) hospitalized, requiring additional oxygen therapy; (5) hospitalized, requiring high-flow nasal oxygen therapy, non-invasive mechanical ventilation or both; (6) hospitalized, requiring extracorporeal membrane oxygenation, mechanical ventilation or both; and (7) death. The scale was used from 2 to 7 for this study
†Baseline is at the day on which patients fulfilled the criteria for hyperinflammation during hospitalisation
*Calculated with one-way ANOVA or Kruskal Wallis, as appropriate.
CT-SS, CT severity score; WHO, World Health Organisation; ECMO, extracorporeal membrane oxygenation; NRM, non-rebreathing mask

ISSN: 1471-2466