In this article I describe more fully ecological studies, their uses, advantages and limitations. Evidence-Based Dentistry - Study Design VI - Ecological Studies Skip to main content ...

Active-comparator designs and new-user designs can help mitigate such biases in observational studies and improve the validity of their findings by making them more closely approximate RCTs.

Methods to analyze data from studies with test-negative designs are the focus of considerable ongoing research. 5,7–10 A clear understanding of the assumptions underlying the design, the reasons ...

In a population-level observational study, researchers used three different study designs to examine vaccine effectiveness among 14,416 patients with stage 5 CKD who had taken a collective of ...

Objective This study evaluates whether Taiwan’s national oral cancer screening programme, implemented in 1999, has led to a ...