Skip to main content

Table 1 Example definitions of cohort studies and case series [2]

From: Clarifying the distinction between case series and cohort studies in systematic reviews of comparative studies: potential impact on body of evidence and workload

Cohort study

A study in which a defined group of people (the cohort) is followed over time, to examine associations between different interventions received and subsequent outcomes.

Case series

Observations are made on a series of individuals, usually all receiving the same intervention, before and after an intervention but with no control group.

Back to article page

BMC Medical Research Methodology

ISSN: 1471-2288

Contact us