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Table 3 Possible presentation of study without a preexisting exposure based comparison (cohort study requiring a reanalysis)

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

Patient

Exposure

Outcome

Patient 1

Yes (e.g. treated)

Yes (e.g. died)

Patient 2

No (e.g. not treated)

No (e.g. alive)

.

.

.

.

.

.

.

.

.

Patient 20

Yes (e.g. treated)

Yes (e.g. alive)

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BMC Medical Research Methodology

ISSN: 1471-2288

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