Table 3 Results for quantitative variables
From: The impact of lung parenchyma attenuation on nodule volumetry in lung cancer screening
Variable | Reader | Tool | n | Mean ± SD | Min | Q1 | Q2 | Q3 | Max |
|---|---|---|---|---|---|---|---|---|---|
Volume (cm3) | Global | 5030 | 98.9 ± 193.2 | 0.0 | 43.5 | 67.0 | 100.0 | 8200.0 | |
Reader 1 | Tool 1 | 1250 | 102.7 ± 257.7 | 3.0 | 43.9 | 67.4 | 100.0 | 8200.0 | |
Tool 2 | 1264 | 97.1 ± 105.5 | 0.0 | 42.0 | 66.5 | 110.0 | 1401.0 | ||
Reader 2 | Tool 1 | 1251 | 100.3 ± 250.6 | 1.3 | 44.0 | 67.2 | 100.0 | 8200.0 | |
Tool 2 | 1265 | 95.5 ± 98.5 | 0.0 | 43.0 | 66.0 | 110.5 | 1402.0 | ||
Manual long-axis diameter (mm) | Global | 5060 | 6.19 ± 1.12 | 4.0 | 5.3 | 6.1 | 7.0 | 10.0 | |
Reader 1 | Tool 1 | 1265 | 6.13 ± 1.11 | 4.4 | 5.2 | 6.0 | 7.0 | 8.4 | |
Tool 2 | 1265 | 6.27 ± 1.11 | 4.2 | 5.4 | 6.2 | 7.1 | 9.3 | ||
Reader 2 | Tool 1 | 1265 | 6.11 ± 1.12 | 4.0 | 5.2 | 6.0 | 7.0 | 9.0 | |
Tool 2 | 1265 | 6.26 ± 1.11 | 4.0 | 5.3 | 6.1 | 7.1 | 10.0 | ||
Manual short-axis diameter (mm) | Global | 5060 | 4.68 ± 1.00 | 1.9 | 4.0 | 4.6 | 5.3 | 9.1 | |
Reader 1 | Tool 1 | 1265 | 4.62 ± 1.00 | 2.2 | 3.9 | 4.5 | 5.2 | 8.3 | |
Tool 2 | 1265 | 4.74 ± 1.00 | 2.3 | 4.1 | 4.6 | 5.3 | 9.1 | ||
Reader 2 | Tool 1 | 1265 | 4.63 ± 1.00 | 1.9 | 3.9 | 4.5 | 5.2 | 8.5 | |
Tool 2 | 1265 | 4.75 ± 0.99 | 2.6 | 4.1 | 4.6 | 5.3 | 8.4 | ||
‘Average of long and short diameters’ (mm) | Global | 5060 | 5.44 ± 0.95 | 3.2 | 4.7 | 5.3 | 6.1 | 9.2 | |
Reader 1 | Tool 1 | 1265 | 5.38 ± 0.96 | 3.4 | 4.7 | 5.2 | 6.0 | 8.3 | |
Tool 2 | 1265 | 5.51 ± 0.94 | 3.6 | 4.8 | 5.4 | 6.2 | 9.2 | ||
Reader 2 | Tool 1 | 1265 | 5.37 ± 0.96 | 3.2 | 4.7 | 5.2 | 6.0 | 8.8 | |
Tool 2 | 1265 | 5.51 ± 0.95 | 3.6 | 4.8 | 5.4 | 6.2 | 8.7 | ||
‘Mean attenuation of the adjacent lung parenchyma’ (HU) | Global | 5060 | − 774.2 ± 84.7 | − 937.0 | − 833.0 | − 790.2 | − 735.8 | − 296.0 | |
Reader 1 | Tool 1 | 1265 | − 761.1 ± 85.3 | − 933.4 | − 821.0 | − 775.2 | − 722.5 | − 306.8 | |
Tool 2 | 1265 | − 787.8 ± 82.4 | − 932.0 | − 845.0 | − 804.0 | − 752.0 | − 317.0 | ||
Reader 2 | Tool 1 | 1265 | − 760.3 ± 84.7 | − 925.9 | − 819.9 | − 775.4 | − 722.4 | − 315.1 | |
Tool 2 | 1265 | − 787.5 ± 82.0 | − 937.0 | − 845.0 | − 805.0 | − 749.5 | − 296.0 |