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. Author manuscript; available in PMC: 2022 Sep 1.
Published in final edited form as: Environ Res. 2021 May 29;200:111394. doi: 10.1016/j.envres.2021.111394

Figure 1: Flow chart of the case-cohort sampling procedure.

Figure 1:

From recruiting the Diet Cancer and Health Cohort (DCH) until the final sample of all never-smoking cases and a random sub cohort.

a: Invitees for the DCH cohort where all cancer free 50-64 year old Danish born residents of Copenhagen and Aarhus area, Denmark; 1993-1997.

b: Cancer diagnosed but not recorded in the Danish Cancer Register prior to recruitment.

c: Of the 534 stroke cases in the never smoking DCH members, 45 were also part of the randomly sampled subcohort.