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Table 4 Comparison of intervals on initial, peak, and pre-discharge CTs of COVID-19a during hospitalization

From: CT appearances, patterns of progression, and follow-up of COVID-19: evaluation on thin-section CT

  Initial CT (yesb, days; noc, days; p value) Peak CT (yesb, days; noc, days; p value) Pre-discharge CT (yesb, days; noc, days; p value)
Initial Interval Consolidation (6.65 ± 3.649; 3.78 ± 1.957; 0.002)
Air bronchogram (6.23 ± 3.524; 2.86 ± 1.215; 0.015)
Irregular line (7.29 ± 3.934; 4.67 ± 2.586; 0.002)
No significant statistically difference Irregular line (6.31 ± 3.603; 4.17 ± 2.875; 0.026)
Peak Interval No significant statistically difference Irregular line (10.50 ± 3.443; 8.17 ± 3.892; 0.014) Irregular line (10.37 ± 3.605; 7.89 ± 3.579; 0.014)
Air bronchogram (10.54 ± 3.641; 7.89 ± 3.579; 0.014)
Pre-discharge Interval No significant statistically difference Irregular line (23.02 ± 6.191; 17.13 ± 8.374; 0.002) Consolidation (19.53 ± 6.768; 23.92 ± 8.032; 0.019)
Crazy-paving pattern (19.26 ± 6.072; 22.80 ± 8.345; 0.049)
Reticulation (25.13 ± 7.356; 19.83 ± 7.130; 0.012)
Peak-initial Interval Consolidation (3.22 ± 3.423; 5.78 ± 2.211; 0.004)
Pleural thickening (3.40 ± 3.339; 5.67 ± 2.717; 0.019)
No significant statistically difference No significant statistically difference
Pre-discharge-peak Interval Crazy-paving pattern (12.26 ± 6.048; 8.50 ± 6.334; 0.044) Irregular line (12.54 ± 5.995; 8.96 ± 6.116; 0.023) Consolidation (9.80 ± 5.814; 14.25 ± 6.045; 0.004)
Crazy-paving pattern (9.44 ± 5.177; 13.20 ± 6.663; 0.011)
Reticulation (14.25 ± 6.445; 10.47 ± 5.947;0.032)
  1. aThe other imaging findings not shown in the table had no significantly statistically difference in intervals
  2. bYes = imaging manifestation
  3. cNo = no imaging manifestation