NBME 20 Case series (NBME Answers)

Retired NBME 20 Answers

nbme20/Block 4/Question#27 (reveal difficulty score)
An investigator is studying patients with ...
Case series 🔍 / 📺 / 🌳 / 📖
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submitted by ∗sympathetikey(1600)

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Case Series

A group or series of case reports involving patients who were given similar treatment. Reports of case series usually contain detailed information about the individual patients. This includes demographic information (for example, age, gender, ethnic origin) and information on diagnosis, treatment, response to treatment, and follow-up after treatment.

In this question, it looks like they didn't really focus on the treatment part of it but otherwise, makes sense

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sympathetikey Source: https://www.cancer.gov/publications/dictionaries/cancer-terms/def/case-series +2

ngman I think another factor is that in case series studies there is no control group vs case-control, cohort...ect +21

leaf_house "There is often confusion in designating studies as 'cohort studies' when only one group of subjects is examined. Yet, unless a second comparative group serving as a control is present, these studies are defined as case-series." https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2998589/ +

fataldose explanation of one of the wrong options - correlational study A correlational study is a type of research design where a researcher seeks to understand what kind of relationships naturally occurring variables have with one another. In simple terms, correlational research seeks to figure out if two or more variables are related and, if so, in what way. (source - https://study.com/academy/lesson/what-is-a-correlational-study-definition-examples.html ) +2

j44n you dont need a control group in a cross sectional one so how do you differentiate that +

imatinib2412 The key to eliminate cross-sectional study here is the "During a 5-year period" part; cross-sectional studies you basically "take a picture" of a certain population and evaluate prevalence of disease/risk factors at that point in time +1

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submitted by bibobra(2)

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A case series is simply a collection of case studies, typically conservative, that document a similar patient presentation or disease manifestation.

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submitted by ∗aoa05(34)

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Case series is the correct answer. This is because there is no relationship being studied here. There is one outcome of interest with is West Nile virus infection. By definition, case series study is descriptive only (no comparison group). It includes group of patients with certain disease or with abnormal sign and symptom.

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