Table 3.

Age, total CT scores on admission and durations of hospitalization of 45 follow-up patients with coronavirus disease 2019 (COVID-19) pneumonia.

Variable	All patients (n = 45)	Group A (n = 11)	Group B (n = 17)	Group C (n = 11)	Group D (n = 6)	P
Age—years						0.005
Median (IQR)	51.0 (40.0–63.0)	41.0 (37.0–50.0)	50.0 (37.0–56.0)	63.0 (51.0–65.5)	64.5 (59.5–65.8)
Mean ± SD	51.2 ± 12.1	43.6 ± 9.6	48.5 ± 11.9	56.9 ± 11.3	61.8 ± 6.2
Total CT score on admission—points						< 0.001
Median (IQR)	6.0 (3.0–10.0)	2.0 (1.0–4.0)	4.0 (3.0–7.0)	9.0 (7.5–13.0)	12.5 (7.8–15.8)
Mean ± SD	6.7 ± 4.9	2.9 ± 2.3	5.4 ± 3.6	10.1 ± 4.5	11.2 ± 5.4
Duration of hospitalization—days						0.595
Median (IQR)	17.0 (14.0–20.0)	15.0 (13.0–18.5)	17.0 (14.0–20.0)	18.0 (16.5–19.0)	19.0 (15.8–23.8)
Mean ± SD	17.8 ± 6.1	15.7 ± 3.6	18.2 ± 7.2	17.5 ± 4.0	21.0 ± 9.1

We categorized the 45 patients who had at least two follow-up scans into four groups: Group A, patients whose lesions reduced ≥ 75%; Group B, those whose lesions reduced 50–75%; Group C, those whose lesions reduced 25–50%; Group D, those whose lesions reduced < 25%. Continuous data were summarized as median with interquartile range (IQR) in brackets and mean ± standard deviation (SD). The Kruskal–Wallis test was applied to compare continuous variables across four groups.