What Are the Challenges in Database Searches for Epidemiology?

Despite their importance, database searches in epidemiology can present several challenges, including:

Volume of Data: The sheer volume of available data can be overwhelming, making it difficult to identify the most pertinent studies.
Inconsistent Terminology: Variability in terminology and classification systems across studies can complicate searches.
Access Restrictions: Some databases require subscriptions or institutional access, limiting availability for independent researchers.
Publication Bias: There is a tendency for studies with positive results to be published more often, potentially skewing available data.