Risk prediction models versus simplified selection criteria to determine eligibility for lung cancer screening: an analysis of German federal-wide survey and incidence data.

For both sexes, analyses by 5-year age group showed a trend towards progressively lower percentages of current smokers with increasing age (Fig. 1 a): 34% of men and 33% of women reported current smoking at ages 50–54 versus 12% and 6%, respectively, at ages 75–79.

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