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. 2021 Jan;10(1):506–518. doi: 10.21037/tlcr.2020.03.40

Table 3. Characteristics of lung cancer patients: comparison between advanced and localized stages (sourced from different studies).

Localized stages (I–II) Advanced stages (III–IV) P
Mean age (years old) 64
Men (%) 73.4%
Smoking habit 46% former smoker; 39.6% current smoker; 13.1% never smoker
Histology 63.8% Adenocarcinoma; 27.7% Squamous; 3.1% Neuroendocrinecarcinoma
PS 0–1 85%
Stage at diagnosis (%) III 28.4% (IIIA 15.8%; IIIB 11.6%; IIIC 1%)
IV 52.2%
Absence of comorbidities (cardiovascular risk factors, stroke, COPD, vasculophaty) 36.6% 63.4% <0,001
Symptoms (cough, chest pain, dyspnea, hemoptysis, weight loss) Infrequent Most frequent <0,001
Previous exposure, %
   Arsenic 65.1 87.5 0.020
   Acrylonitrile 65.1 75 0.020
   Asbestos 47.5 34.9 0.020
   Paint 38.1 34.9 0.020
   Diesel engine fumes 38.2 34.9 0.020
History of other tumor(s), % 47.6 34.9 0.001
Smoking habit
   Active smoking habit Least frequent Most frequent 0.001
   Passive smoking habit Least frequent Most frequent 0.003
Mutations ALK 30.7% (2012) vs. 64.8% (2018) ROS1 6.7% (2012) vs. 20.7% (2018) EGFR 84.8% (2012) vs. 92.1% (2018) 0.001