Skip to main content

Advertisement

Figure 1 | BMC Medical Research Methodology

Figure 1

From: The impact of attrition on the representativeness of cohort studies of older people

Figure 1

Changes to prevalence of the hypothetical risk factor, assuming no association between the risk factor and the risk of death, in the population or the cohort; no association between the risk factor and non-death attrition in the cohort. The left panel, Figure 1A, assumes no bias and the right panel, Figure 1B, assumes lower prevalence of the risk factor at the beginning of the study.

Back to article page