Transcript Document

PubMed
Elsevier HS B&J, Taiwan
Presented By: Gary Cheng
Date:Feb 21 2012
Outline


What is MEDLINE/PubMed in NLM?

What is Index Medicus?
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History of NLM and MEDLINE
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MEDLINE®/PubMed® Data Element (Field) Descriptions
Introduction of PubMed/MEDLINE Function
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LinkOut
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MeSH
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Limit
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Subheading
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Relative articles
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Clinical Queries
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My NCBI
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Index Medicus
MEDLINE的前身為美國《醫學索引》是當前世界上最著名的大型生物
醫學文獻檢索刊物，1879年創刊，由美國國立醫學圖書館(The National
Library of Medicine)編輯出版。
1．期刊索引
月刊，每年ㄧ卷，每卷十二期，每期內容分三個部份，分兩冊
出版。
Part 1 ：Subject Section
Part 2 ： Author Section
 Bibliography of Medical Reviews
2．MeSH
用於尋找IM主題檢索，每年隨IM的第一期出版。
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Historical Record of Index Medicus
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Milestones in NLM History
http://www.nlm.nih.gov/about/nlmhistory.html
1836 Library of the Office of the Surgeon General of the Army established.
1879 First volume of Index Medicus published.
1956 October 1 Act of Congress moved Armed Forces Medical Library to Public
Health Service (PHS) and rechristened it the National Library of Medicine (NLM).
1971 October MEDLINE was initiated to provide online access.
1993 October NLM's Internet World Wide Web site (www.nlm.nih.gov) appeared.
1997 June 26 Web-based access to NLM's MEDLINE became available free of charge.
1998 October MedlinePlus created to provide access to consumer health information.
2000 February 29 ClinicalTrials.gov, an online resource designed to give the public
easy access to information about research studies, was launched.
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NLM Programs and Services Annual Report - Fiscal Year 1997
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Content of Medline/PubMed
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36 data bases in PubMed
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MEDLINE was most important
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5200 titles from USA
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自1966至現在，一億六千多萬書目資料，且每個月以
20000筆的速度增加。
Medical Subject Headings (MeSH®).
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MEDLINE®/PubMed® Data Element (Field) Descriptions
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MEDLINE®/PubMed® Data Element (Field) Descriptions
PPMID- 19422719
TI - A complementary method for detecting qi vacuity.
AB - BACKGROUND: Qi vacuity (QV) is defined by traditional Chinese medicine as a
loss of energy in the human body. An objective method for detecting QV was notav ailable
until recently, however. The automatic reflective diagnosis system……
AD - Department of Internal Medicine, Show Chwan Memorial Hospital, No. 542, Sec 1.
Chung-Shang Road, Changhua City, Taiwan. [email protected]
FAU - Chen, Ming-Feng
MH - Adolescent
MH - Adult
MH - Case-Control Studies
MH - *Diagnosis
MH - Female
MH - *Galvanic Skin Response
MH - Humans
MH - Male
MH - *Medicine, Chinese Traditional
MH - Methods
SO - BMC Complement Altern Med. 2009 May 8;9:12.
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MeSH
自然語言 (nature language) 與索引 (index term)
- 以索引搜尋的目的在於增加檢索專一度 (specificity)
優點
缺點
自然語言 可搜尋似是而非或未 可能會得到許多不相
經索引分類的主題
關的文獻，未考慮同
義字或時態/語系差異
索引
可透過索引可歸類相 須重複檢索較花時間
關同義字
Note

常見索引 (index term) 分類系統例如美國國家醫學圖書館
的MeSH (medical subheading)，
已經可以
時以自然語言及MeSH進行搜尋

以MeSH名詞搜尋並非萬無一失
- PubMed常見狀態分類 (status subset)
MeSH 篇數
381428
as supplied by publisher 出版商提供引用
418151
加工中
in process
標籤
狀態
indexed for MEDLINE
加工完畢
◎
19035076
Note
還沒加工完畢的文章，僅用MeSH名詞是搜尋不到的!!
破解: your keywords AND (inprocess[sb] OR publisher[sb] OR pubmednotmedline[sb])
PubMed Limits
使用Limits後， In process 、supplied by
publisher、非Medline 的文獻，將被排除～ 因為
Limits 條件大多是已加工索引完成書目才具有
破解: your keywords AND (inprocess[sb] OR publisher[sb] OR pubmednotmedline[sb])
#9
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(區塊內OR；區塊間AND)
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勿與Type of Article併用
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常用MeSH名詞副標題 (subheading) 組合
簡寫 副標題
用途
AE
DT
Adverse effects
Drug therapy
不良反應相關研究
藥物治療相關研究
DU
PK
Diagnostic use
Pharmacokinetics
作為診斷工具研究
藥物動力學研究
PD
Pharmacology
藥理學相關研究
PO
Poisoning
毒理相關研究
PC
TU
Prevention and control 預防相關研究
Therapeutic use
治療用途研究
varenicline/drug therapy (後面不需加上[mh])
Relative Articles

比對相關文獻 (related citations) 功能
內建語法會根據摘要、標題與MeSH名詞，配合字元權重
算出最接近的鄰居 (neighborhood)
Clinical Queries using Research Methodology Filters
Category
Optimized
For
Sensitive
Specific
sensitive/
broad
99%
70%
((clinical[Title/Abstract] AND trial[Title/Abstract]) OR clinical trials[MeSH Terms] OR
clinical trial[Publication Type] OR random*[Title/Abstract] OR random allocation[MeSH
Terms] OR therapeutic use[MeSH Subheading])
specific/
narrow
93%
97%
(randomized controlled trial[Publication Type] OR (randomized[Title/Abstract] AND
controlled[Title/Abstract] AND trial[Title/Abstract]))
sensitive/
broad
98%
74%
(sensitiv*[Title/Abstract] OR sensitivity and specificity[MeSH Terms] OR
diagnos*[Title/Abstract] OR diagnosis[MeSH:noexp] OR diagnostic * [MeSH:noexp] OR
diagnosis,differential[MeSH:noexp] OR diagnosis[Subheading:noexp])
specific/
narrow
64%
98%
(specificity[Title/Abstract])
sensitive/
broad
93%
63%
(risk*[Title/Abstract] OR risk*[MeSH:noexp] OR risk *[MeSH:noexp] OR cohort
studies[MeSH Terms] OR group*[Text Word])
specific/
narrow
51%
95%
((relative[Title/Abstract] AND risk*[Title/Abstract]) OR (relative risk[Text Word]) OR
risks[Text Word] OR cohort studies[MeSH:noexp] OR (cohort[Title/Abstract] AND
stud*[Title/Abstract]))
sensitive/
broad
90%
80%
(incidence[MeSH:noexp] OR mortality[MeSH Terms] OR follow up studies[MeSH:noexp]
OR prognos*[Text Word] OR predict*[Text Word] OR course*[Text Word])
specific/
narrow
52%
94%
(prognos*[Title/Abstract] OR (first[Title/Abstract] AND episode[Title/Abstract]) OR
cohort[Title/Abstract])
sensitive/
broad
96%
79%
(predict*[tiab] OR predictive value of tests[mh] OR scor*[tiab] OR observ*[tiab] OR
observer variation[mh])
specific/
narrow
54%
99%
(validation[tiab] OR validate[tiab])
therapy
diagnosis
etiology
PubMed Equivalent
prognosis
clinical
prediction
guides
EBM Unfiltered Resour 語法
Save filter as (命名) 
Query Terms (查詢語法) 
Therapy‧RCTs
Therapy/Narrow[Filter]
Therapy‧Clinical Trials
Therapy/Broad[Filter]
Diagnosis/Broad
Diagnosis/Narrow[Filter]
Prognosis /Broad
Prognosis/Broad[Filter]
Etiology /Broad
Etiology/Broad[Filter]
Qualitative /Broad
interview*[tiab] OR psychology[sh:noexp] OR
health services administration[mesh]
更多篩選機制(包括Costs, Economics, Clinical Prediction Guides)
參考: http://hiru.mcmaster.ca/hiru/HIRU_Hedges_MEDLINE_Strategies.aspx
Thanks for your attention