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. Author manuscript; available in PMC: 2014 Oct 11.
Published in final edited form as: Epidemiology. 2009 May;20(3):321–329. doi: 10.1097/EDE.0b013e31819e370b

Figure 1.

Figure 1

Figure 1

Figure 1

Figure 1

Nested case-control sampling from the Colorado Plateau uranium miners cohort. A. Risk sets at the age of lung cancer deaths. The ‘●’ denote cases and ‘|’ risk set controls. B. Year of birth matched risk sets. C. Sampling controls from matched risk sets. The ‘○’ are sampled controls. D. Sampling cases from the cohort. The ‘●’ denote sampled cases, ‘*’ cases not sampled, and ‘○’ are sampled controls.