Table 1 Descriptive statistics of the enrolled subject population. Smoking status encompasses patients that never smoked (never); former smokers that included patients that quit smoking greater than one year (former); and current smokers (current). Pack years refers to packs per day multiplied by years smoked and quit years the number of years since quitting smoking. Never – never smoker; LUAD – lung adenocarcinoma; and LUSC– lung squamous cell carcinoma. Data is shown as mean ± SD. Never smokers were of a significantly lower age than the other groups and the fraction of smokers within the cancer cases was statistically higher than chance (*P < 0.05 and **P < 0.01). #Total number of donors per category aggregating all experiments, with individual figures in the text representing subgroups from each donor category. &Self reported; ^Medical records/physician/chart verified

From: Distinctive field effects of smoking and lung cancer case-control status on bronchial basal cell growth and signaling