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How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological...

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How to do literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1
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Page 1: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

How to do literature search

Vo Tuan Khoa

Epidemiological Research Training Course VI-1

Page 2: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

What is practice of EBM?1. Develop a focused clinical question2. Search for the best evidence3. Critically appraise the evidence4. Apply the evidence and evaluate the outcome

The electronic databases

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Page 3: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

www.pubmed.com

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Page 4: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

Pubmed database• Developed by National Center for Biotechnology

Information (NCBI) at National Library of Medicine (NLM)

• Included MedLine, Old MedLine (1951 to 1965), some non-MedLine journals; published before selection for MedLine indexing, and ‘selectively indexed’ MedLine

• Search engine: receive a search request compare it with an index return the corresponding results.

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Page 5: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

A search strategyDevelop clinical question

Identify key concept(s)

Connect concept(s) by boolean logic

Run the seach in PubMed

Limits to search5

Page 6: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

How questions influences the search results?

6Robin Featherstone. How to Conduct a Systematic Search in PubMedhttp://www.slideshare.net/featherr/how-to-conduct-a-systematic-search-in-pubmed

Page 7: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

Possible questionBroad• What is the prevalence of sexual disorders in

diabetes?Narrow• What is the risk of pancreas cancer for type 2

diabetes patients treated with DDP-IV inhibitors?Too narrow• What is the rate of unintended pregnancy for

working women in HCM City between 2000 and 2010?

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Page 8: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

Key concept• Medical term: high blood pressure

hypertension• Acronym: MEN Multiple Endocrine

Neoplasm• Variant: tumor or tumour• PICO format• MeSH (Medical Subject Headings) tools

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Page 9: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

Develop a PICO format

• Population/patients

• Intervention/exposure

• Comparison

• Outcome/endpoint

• Type 2 diabetes

• DPP-IV inhibitors

• (none)

• Pancreas cancer

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Page 10: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

Identify MeSH for concept(s)What is the MeSH for these concepts?• Type 2 diabetes• Dipeptyl-Peptidase IV inhibitors or incretin?• Pancreas cancer or pancreatic cancer?

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Page 11: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

• On PubMed screen, select MeSH Database link

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Page 12: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

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Page 13: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

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Page 14: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

Boolean operators

A AND B A OR B A NOT B

For PubMed search:• Boolean connectors in a left-to-right sequence • Must be entered in upper case

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Page 15: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

Limits to search• Publication date: the last 5 years• Types of article: clinical trial, meta-analysis,

systematic review• Language: english• Species: human• Sex: specify• Age: children or adult• Field tags: title

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Page 16: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

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Page 17: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

Clinical scenario• A 60 year-old female had type 2 diabetes for

two years. She was treated with metformin and pioglitazone.

• Recently, she heard that pioglitazone treatment is associated with (hip) fracture

• What do you do?

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Page 18: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

How to run a search in PubMed• Clinical queries• MeSH tools• PICO tools

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Page 19: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

How to use Clinical Queries

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Page 20: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

1. www.pubmed.com, click on Clinical Queries link2. Type key words on search engine

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Page 21: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

Results

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Page 22: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

How to use MeSH tools

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Page 23: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

Setting MeSH-1 and boolean logic1. www.pubmed.com, click on MeSH link2. type key words on box search

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Page 24: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

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Page 25: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

Setting MeSH-2 and boolean logic

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Page 26: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

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Page 27: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

Setting MeSH-3 and Boolean logic

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Page 28: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

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Page 29: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

Select Search Pubmed of menuPubmed search builder

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Page 30: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

Primary results

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Page 31: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

How to use PICO tools

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Page 32: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

Setting PICO• P: type 2 diabetes• I: pioglitazone or thiazolidindione• C: none• O: fracture

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Page 33: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

Log on to: http://pubmedhh.nlm.nih.gov/nlm/picostudy/

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Page 34: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

Click on one of two links

PICO A PICO B

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Page 35: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

Type key words

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Page 36: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

Results

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Page 37: How to do literature search - Fukushima Medical …literature search Vo Tuan Khoa Epidemiological Research Training Course VI-1 What is practice of EBM? 1.Develop a focused clinical

Summary

• Searching literature is very important• 3 methods

– MeSH tool academic users– Clinical queries busy users– PICO advanced users

• Do practice…practice again…practice more and more

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