Direct comparison
Case Study vs. Case Report
Case study is a qualitative research method; case report is a clinical publication format for one patient. Key differences and consent rules.
Side-by-side comparison
| Dimension | Case Study | Case Report |
|---|---|---|
| What it is | A qualitative research methodology for investigating a bounded, real-world case (a person, group, organization, program, or event) in depth. | A short clinical publication format documenting one patient's (or a small case series') unusual presentation, intervention, or outcome. |
| Primary fields | Business, education, social science, nursing/health-services research, program evaluation, and other qualitative-research disciplines. | Clinical medicine — published in medical and biomedical journals. |
| Data sources | Multiple, triangulated sources: interviews, direct observation, documents, archival records, and physical artifacts. | The patient's clinical record: history, examination findings, investigations, treatment, and follow-up. |
| Purpose | Builds contextual, often theory-generating understanding of a bounded phenomenon; driven by an explicit research question and theoretical framework. | Documents a novel, rare, or instructive clinical finding to alert or educate other clinicians; hypothesis-generating, not hypothesis-testing. |
| Reporting standard | No single universal reporting checklist; established methodological texts (notably Robert Yin's and Robert Stake's case-study research traditions) and some journals' own structural requirements guide reporting. | CARE (CAse REport) Guidelines — a 13-item checklist covering title, patient information, timeline, diagnostic assessment, intervention, outcome, and informed consent. |
| Scope / N | Typically one case, but a 'case' can be an individual, an institution, a program, or an event, examined from many angles. | One patient, or a small case series of a handful of patients with the same or a related presentation. |
| Place in the evidence hierarchy | Not ranked on the clinical evidence hierarchy — evaluated on its own methodological rigor (trustworthiness, transferability), not against RCTs. | Sits at the base of the clinical evidence hierarchy alongside case series — generates hypotheses rather than testing them. |
| Patient consent | Governed by the study's own IRB/ethics approval and participant-consent process for the underlying qualitative research (interviews, records access). | Almost always requires a separate, specific patient consent to publish identifiable clinical details or images, per ICMJE and CARE checklist item 13, independent of any IRB approval for the underlying care. |
| Typical publication venue | Qualitative-research, education, business, or health-services-research journals. | Medical/biomedical journals and dedicated case-report journals (e.g., BMJ Case Reports, Journal of Medical Case Reports). |
Common questions
FAQ
Is a case study the same as a case report?+
No. The terms are frequently used loosely as synonyms, but they describe different things. A case study is a research methodology for investigating a bounded case in depth using multiple data sources. A case report is a specific clinical publication format documenting one patient's unusual presentation. A write-up of a single clinical episode is a case report; it is not a case study in the qualitative-research sense unless it follows a case-study protocol with multiple triangulated data sources and an explicit research question.
What reporting guideline should I follow for a case study versus a case report?+
For a clinical case report, use the CARE Guidelines, a 13-item checklist. For a case study as qualitative research, there is no single universal checklist; established texts, most often those by Robert Yin and Robert Stake, describe accepted case-study design and reporting practice, and some journals set their own structural requirements.
Do case reports on children (pediatric case reports) follow different rules?+
The reporting structure is the same — CARE Guidelines apply regardless of patient age — but consent adds a layer: for a minor, informed consent for publication is typically obtained from a parent or legal guardian, and many journals also seek the child's assent where developmentally appropriate, in addition to any institutional child-protection or IRB review the case may trigger.
Does a case report need IRB approval?+
Practice varies by institution. Many institutions treat a single retrospective case report as exempt from formal IRB review since it doesn't test a hypothesis across a population, but this determination is institutional, not universal — check local policy. An IRB exemption, if granted, does not remove the separate ICMJE/CARE requirement for patient consent to publish identifiable details.
