TP53 and lung cancer: Among patients with TP53-mutated lung cancer, no significant differences in either the proportion of smokers (segments 1–8: 86.8%, segments 9–10: 82.1%, p = 0.55) or the smoking index, defined as number of cigarettes smoked per day multiplied by years smoked (segments 1–8: 280 ± 54, segments 9–10: 234 ± 62, p = 0.83), were observed between those with lung cancers located in segments 9 and 10 and those with lung cancers located in segments 1 to 8.