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Table 2 Distribution of the lesions integrated into the grading system, number of involved zones (n), and percentages (%) (n = 113, total zone = 678)

From: Efficacy of chest X-ray in the diagnosis of COVID-19 pneumonia: comparison with computed tomography through a simplified scoring system designed for triage

  Grade 1 Grade 2 Grade 3 Total
CXR CT CXR CT CXR CT CXR CT
RLZ 26.5% (30) 52.2% (59) 20.4% (23) 17.7% (20) 14.2% (16) 23.9% (27) 61.0% (69) 93.8% (106)
RMZ 23.9% (27) 45.1% (51) 12.4% (14) 24.8% (28) 10.6% (12) 20.4% (23) 46.9% (53) 90.3% (102)
RUZ 8.0% (9) 53.1% (60) 5.3% (6) 15.9% (18) 5.3% (6) 7.1% (8) 18.6% (21) 76.1% (86)
LLZ 24.8% (28) 46.9% (53) 15.9% (18) 20.4% (23) 10.6% (12) 17.7% (20) 51.3% (58) 85.0% (96)
LMZ 13.3% (15) 45.1% (51) 8.0% (9) 23.0% (26) 9.7% (11) 14.2% (16) 31.0% (35) 82.3% (93)
LUZ 4.4% (5) 53.1% (60) 2.7% (3) 10.6% (12) 5.3% (6) 5.3% (6) 12.4% (14) 69.0% (78)
Total 16.8% (114) 49.2% (334) 11.6% (73) 18.7% (127) 9.2% (63) 14.7% (100) 36.9% (250) 82.7% (561)
  1. CXR chest X-ray, CT computed tomography, LLZ left lower zone, LMZ left middle zone, LUZ left upper zone, RLZ right lower zone, RMZ right middle zone, RUZ right upper zone