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9.1 years ago
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I want to find all cohort studies on type 2 diabetes published in the last 5 years. I used the following query:
"diabetes mellitus, type 2"[MeSH Terms] AND "cohort studies"[MeSH Terms] AND ("2010/03/09"[PDat] : "2015/03/07"[PDat])
However, among the results, there are some studies that don't have the "cohort studies"[MeSH Terms], but
- Cross-Sectional Studies[MeSH Terms]
- Longitudinal Studies[MeSH Terms]: Cohort studies are longitudinal studies which also include other study designs such as case control.
My questions are:
- Why does PubMed return studies that don't have one of the query terms?
- How do MeSH terms exactly work?
- What is the best search query that retrieves only cohort studies on type 2 diabetes?
Thank you in advance for you help!