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Table 1 Patients’ characteristics

From: Prognostic impact of vascular invasion and standardization of its evaluation in stage I non-small cell lung cancer

   All ≤3 cm (IA or IB [PL]) 3–5 cm (IB)
Number of patients   467 335 132
Age range Years 29–88 29–86 46–88
(mean/median) (65.4/66) (64/65) (68.6/69.5)
Sex Male 234 164 70
Female 233 171 62
Smoking status Smoker 247 170 77
Non-smoker 220 165 55
p-Stage IA 299 299 0
IB 168 36 132
Histological differentiation Adenocarcinoma 387 288 99
Squamous cell 47 24 23
carcinoma    
Others 33 23 10
Recurrence   51 28 23
Deaths Present 81 45 36
Absent 386 290 96
(Cause of death) (Lung cancer) (37) (18) (19)