Tobacco addiction and consumption n=71 The smoking period Smokers 66 (93%) <40 years 37 (52%) ≥40 years 29 (41%) Non-smokers 5 (7%) The amount of cigarettes smoked 10-15 cigarettes per day 6 (8%) 20 cigarettes per day (1 pack) 43 (61%) 30-40 cigarettes per day (1,5-2 packs) 17 (24%) Pack Years (PYs) Up to 40 PYs 30 (42%) ≥40 PYs 36 (51%)

Table 1: Characterization of the studied NSCLC patients regarding their tobacco addiction and consumption (amount of cigarettes smoked per day and PYs).