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Table 2 The distribution and frequency of the radiographic findings.

From: Chest X-ray findings monitoring COVID-19 disease course and severity

  No. (%)
X-ray findings
 Negative 82 (23.4)
 Initial negative then become positive 48 (13.7)
 Positive from start 220 (62.9)
Initial X-ray (n = 350)
 Negative 130 (37.1)
 Positive 220 (62.9)
1st follow-up X-ray (1–4 days) (n = 276)
 Negative 40 (14.5)
 Positive 236 (85.5)
2nd follow-up X-ray (5–9 days) (n = 167)
 Negative 29 (17.4)
 Positive 138 (82.6)
3rd follow-up X-ray (10–15 days) (n = 135)
 Negative 39 (28.9)
 Positive 96 (71.1)
4th follow-up X-ray (> 15 days) (n = 132)
 Negative 51 (38.6)
 Positive 81 (61.4)
Affected lung
 Right 42 (15.7)
 Left 45 (16.8)
 Both 181 (67.5)
Distribution
 Perihilar 31(11.6)
 Peripheral 156 (58.2)
 Neither 81 (30.2)
Ground glass appearance 87 (32.5)
Consolidation 218 (81.3)
Reticular thickening 107 (39.9)
Pulmonary nodules 25 (9.3)
Pleural effusion 20 (7.5)
Predominance
 Upper zone 17 (6.4)
 Lower zone 196 (73.1)
 Non-zonal 55 (20.5)
Maximum severity score
 0 82 (23.4)
 1 57 (16.2)
 2 91 (26.0)
 3 38 (10.9)
 4 24 (6.9)
 5 20 (5.7)
 6 16 (4.6)
 7 20 (5.7)
 8 2 (0.6)
Time to maximum total severity score
 Initial X-ray 113 (42.2)
 1–4 days 92 (34.3)
 5–9 days 58 (21.6)
 10–15 days 5 (1.9)