comparability

What are Common Issues Affecting Comparability?

Several factors can impact the comparability of groups in epidemiological studies:
Selection bias: If the method of selecting participants leads to groups that differ systematically, the results may be skewed.
Confounding: When an extraneous variable is associated with both the exposure and the outcome, it can distort the true relationship being studied.
Information bias: Differences in the accuracy or completeness of data collected from different groups can affect comparability.

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