Table 3. Characteristics of quantitative airway dimensions of patients with COVID-19 who had paired CT scans versus non-COVID-19 participants.
| Airway dimensions | COVID-19 | Non-COVID-19 (n=32) | |
|---|---|---|---|
| At initial stage (n=66) | At convalescent stage (n=66) | ||
| 1st gen. WA (%)†‡§ | 46.59 (2.80) | 45.49 (2.43) | 44.39 (2.03) |
| 2nd gen. WA (%)†‡§ | 51.19 (2.78) | 50.03 (2.69) | 48.50 (2.61) |
| 3rd gen. WA (%)†‡§ | 59.85 (3.39) | 58.13 (3.51) | 56.12 (3.71) |
| 4th gen. WA (%)†‡§ | 65.22 (2.58) | 63.95 (2.52) | 61.97 (3.26) |
| 5th gen. WA (%)†‡§ | 67.84 (2.28) | 66.38 (1.94) | 64.74 (2.73) |
| 6th gen. WA (%)†‡ | 69.02 (2.08) | 67.53 (1.70) | 66.79 (2.64) |
| 7th gen. WA (%)†‡§ | 69.84 (2.02) | 68.33 (2.38) | 67.08 (2.28) |
| 8th gen. WA (%)†‡§ | 70.21 (3.10) | 68.99 (1.99) | 67.10 (2.81) |
| Pi 10 (mm)†‡ | 4.07 (0.20) | 3.90 (0.12) | 3.91 (0.20) |
Values are presented as mean (standard deviation). †, denotes P<0.05 by paired-sample t-test for comparison between the initial stage and convalescent stage; ‡, denotes P<0.05 by two independent-sample t-test for comparison between the initial stage and non-COVID-19 controls; §, denotes P<0.05 by two independent-sample t-test for comparison between the convalescent stage and non-COVID-19 controls. WA%, wall area fraction; gen., generation; Pi10, internal airway perimeter of 10 mm.