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. 2015 Sep 16;7(2):199–206. doi: 10.1111/1759-7714.12312

Table 1.

Clinicopathologic characteristics of the 4L and non‐4L groups

Factor 4L dissection Non‐4L dissection P value
Gender
Male 130 61 0.969
Female 40 19
Age (years) 58.45 ± 8.54 60.31 ± 9.10 0.117
Tumor location
Upper 22 8 0.381
Middle 114 50
Lower 34 22
P stage
I 43 19 0.665
II 54 30
III 73 31
Tumor invasion degree
T1 39 26 0.263*
T2 33 16
T3 94 35
T4 4 3
Number of retrieved nodes
Mediastinal nodes 21.06 ± 6.89 14.90 ± 5.65 <0.001
Abdominal nodes 13.10 ± 6.71 11.73 ± 4.89 0.102
Total operation time (minutes)
Chest 130 (30) 125 (30) 0.675
Abdomen and neck 110 (22.5) 120 (20) 0.920
Blood loss total (mL)
Thorax 200 (112.5) 150 (100) 0.009
Abdominal and neck 30 (30) 30 (10) 0.124
Conversion (cases)
Thoracotomy 6 3 1.000*
Length of hospital stay 13 (5) 12 (5) 0.261

*Fisher's exact test.