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Table 3 Comparison of patients with central and peripheral lung cancers in X, Y, and Z axes (P value)

From: Comparison of different registration methods and landmarks for image-guided radiation therapy of pulmonary tumors

 

Central type (n = 42)

Peripheral type (n = 18)

P

Age (median, range)

67.0 ± 8.9

67.4 ± 10.4

0.869

Gender (n, %)

25, 60%

10, 56%

 

Weight

65.6 ± 10.0

72.3 ± 11.4

0.027

Primary NSCLC

42

14

0.002

Pulmonary metastasis

0

4

 

Tumor size

 Diameter of tumor (cm) (mean ± SD)

6.2 ± 2.2

5.2 ± 2.2

0.095

 Range (cm)

1.67–12.00

1.5–9.00

 

Target number of each patient

  

0.007

 One target

42

14

 

 Two targets

0

3

 

 Three targets

0

1

 

The whole lung (absolute value)

 X direction (mm)

0.043 ± 0.059

0.039 ± 0.050

0.804

 Y direction (mm)

0.093 ± 0.116

0.144 ± 0.154

0.158

 Z direction (mm)

0.081 ± 0.117

0.067 ± 0.069

0.632

Affected side (absolute value)

 X direction (mm)

0.033 ± 0.053

0.067 ± 0.067

0.045

 Y direction (mm)

0.136 ± 0.139

0.133 ± 0.137

0.952

 Z direction (mm)

0.110 ± 0.103

0.156 ± 0.172

0.205

Tumor (absolute value)

 X direction (mm)

0.086 ± 0.075

0.128 ± 0.118

0.102

 Y direction (mm)

0.148 ± 0.157

0.150 ± 0.154

0.957

 Z direction (mm)

0.162 ± 0.132

0.189 ± 0.230

0.568

Vertebral body (absolute value)

 X direction (mm)

0.102 ± 0.078

0.139 ± 0.129

0.181

 Y direction (mm)

0.219 ± 0.203

0.267 ± 0.214

0.416

 Z direction (mm)

0.107 ± 0.095

0.144 ± 0.115

0.195