OVIDSP Searches Library Informatics 2011/2012 Edit Csajbók Semmelweis University Central Library

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Search in Ovid MEDLINE We can search for subject, author, title, journal, institution, ISSN…ect. (all fields are found in Search fields) Search for topic Keyword – Advanced Ovid Search Subject heading – Advanced Ovid Search Natural language – Basic Search 4/33

Search in MEDLINE Start at the beginning – search with keyword I would like to read about drug therapy of patients who suffer from Diabetes Mellitus and Hypertension. Possible keywords: Diabetes, high blood pressure, drug therapy 5/33

Keyword search step by step 1. choose database Select the three segments of Medline and then click on „Select resource(s)” 6/33

Keyword search step by step 2. Search for keywords Search type: Advanced Ovid Search „Keyword” selected „Map term to subject heading” is unselected because we want to search for keyword not subject heading. Write your first keyword (diabetes) in the search box and click on „search” 7/33

Keyword search step by step 3.We search for the other keywords separately in the same way Search for keywords separately is useful because later there will be several way to combine them using Boolean operator. 8/33

Keyword search step by step 4. Determine the relationship among our keywords using AND Boolean operator I select my searches and then I clink on „Combine selection with AND”. 9/33

Keyword search step by step 5. If we have too many results, limit them! We can limit e.g. to publication year. We can choose among default filter criteria or click on „Additional Limits”-we get the all filter criteria. I select „Middle Aged (45 plus years) group from the list and I click on „Limit a search”. 10/33

Let’s see this topic with search by subject headings!

Search in MEDLINE Continue with subject headings ! Search for subject headings can be used if we select only one database Articles are indexed by the most specific subject headings (e.g. there is an article about Diabetes Mellitus Type 2, the article’s subject heading is „Diabetes Mellitus, Type 2” not „Diabetes Mellitus” Generally an article is indexed by 2-3 or more main subject headings and more general subject headings. 12/33

Let’s see the Mesh Subject Headings system! Subject headings are hyperlinked to a structured vocabulary tool such as a tree This Mapping Display illustrates well the hierarchy of Subject Headings 13/33

Search by Subject Headings step by step I would like to read about drug therapy of patients who suffer from Diabetes Mellitus and Hypertension. Possible keywords: Diabetes, high blood pressure, drug therapy 14/33

Search by Subject Headings step by step 1. choose the database Select the three segments of Medline and click on „Selected Resource(s)” 15/33

Search by Subject Headings step by step 2. Search for subject headings to our keywords Search type: Advanced Ovid Search „Keyword” is selected „Map term to subject heading” is selected because we want to search for subject headings Write your first keyword (diabetes) into the searchbox and then click on „search” 16/33

The database shows the potential subject headings to our keyword. We can select the most suitable subject headings used by checking boxes. If we select more subject headings we can determine their relationship using Boolean operator and then select „Include All Subheadings”. Auto Explode: for broader results. Focus: for topic-specific results. Scope: information. 17/33

Search by Subject Headings step by step 3. Search for all subject headings separately 18/33

Search by Subject Headings step by step 4. Determine the relationship among subject headings – AND Boolean operator Select all subject headings and click on „combine selections with AND”. 19/33

Search by Subject Headings step by step 5. If we have too many results, limit them! We can limit e.g. to publication year. We can choose among default filter criteria or click on „Additional Limits”-we get the all filter criteria. 20/33

Let’s see this topic with search by natural language!

Basic Search Simply enter a search term or ask a question in ordinary, everyday English terms OvidSP filters the terms of your query, eliminating irrelevant noise words and tightening word choices into validated search terms and phrases. OvidSP utilizes a proprietary medical lexicon to expand validated terms Some useful practices : Don’t use unnecessary adjectives. Don’t use question mark, hyphen, bracket... Don’t use Boolean operators for combining records Expect approximately 500 relevancy-ranked results ! 22/33

Search in natural language What drug therapy can be given to patient with high blood pressure and diabetes? 23/33

Search in natural language step by step 1. Choose the database Select the three segments of Medline and click on „Selected Resource(s)” 24/33

Search in natural language step by step 2. Search for our query Search Type: Basic Search Using of Check Spelling and Include Related terms is recommended. Write our sentence into the searchbox. 38/46

Let’s see what kind of terms were added to our query! 39/46

Search in natural language step by step 4. If we have too many results, limit them! We can limit our results to publication years and topic reviews. We can choose among default filter criteria or click on „Additional Limits”-we get the all filter criteria. 40/46

Comparing of the results. Keywords – Subject Headings – Natural language Searh for keywords: Search for subject headings: Search in natural language: 28/33

Key elements of the result list Complete Reference: a display of complete bibliographic information for records. For example: MeSH subject headings ! Medline is a bibliographic database, but full texts are provided by Ovid Linksolver where we have subscriptions or it is an open access! 29/33

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OvidLinksolver provide full text link where we have subscription or which is open access 31/33

More information about Result Manager, RSS, etoc… You can find more information about it in OvidSP and the value-added services 32/33

Thank you for your attention! Edit Csajbók