- Case series
A case series (also known as a clinical series) is a medical research descriptive study that tracks patients with a known exposure given similar treatment or examines their medical records for exposure and outcome. It can be retrospective or prospective and usually involves a smaller number of patients than more powerful case-control studies or randomized controlled trials. Case series may be consecutive or non-consecutive, depending on whether all cases presenting to the reporting authors over a period of time were included, or only a selection.
Case series may be confounded by selection bias, which limits statements on the causality of correlations observed; for example, physicians who look at patients with a certain illness and a suspected linked exposure will have a selection bias in that they have drawn their patients from a narrow selection (namely their hospital or clinic).
- ^ "Definition of case series - NCI Dictionary of Cancer Terms". http://www.cancer.gov/Templates/db_alpha.aspx?CdrID=44006.
- ^ "Definition of consecutive case series - NCI Dictionary of Cancer Terms". http://www.cancer.gov/Templates/db_alpha.aspx?CdrID=285747.
- ^ "Definition of nonconsecutive case series - NCI Dictionary of Cancer Terms". http://www.cancer.gov/Templates/db_alpha.aspx?CdrID=44575.
- Study Design Tutorial Cornell University College of Veterinary Medicine
Biomedical research: Clinical study design / Design of experiments Overview Controlled study
(EBM I to II-1; A to B)
(EBM II-2 to II-3; B to C)
occurrence: Incidence (Cumulative incidence) · Prevalence (Point prevalence, Period prevalence)
association: absolute (Absolute risk reduction, Attributable risk, Attributable risk percent) · relative (Relative risk, Odds ratio, Hazard ratio)
other: Virulence · Infectivity · Mortality rate · Morbidity · Case fatality · Specificity and sensitivity · Likelihood-ratios · Pre/post-test probability
Trial/test types Analysis of clinical trials
Interpretation of results Category · Glossary · List of topics
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