pre existing health conditions

What are the Challenges in Studying Pre-existing Conditions?

One of the main challenges in studying pre-existing conditions is data collection. Self-reported data may be subject to recall bias, and medical records may be incomplete. Additionally, the heterogeneity of pre-existing conditions makes it difficult to generalize findings. Researchers must also account for confounding variables that could influence the relationship between pre-existing conditions and new illnesses.

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