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Subject:

MEDICINE : RESEARCH : DATABASES: MEDICAL HEALTH BIOSCIENCES BIOLOGY PSYCHOLOGY: Google Scholar Retrieves Twice as Many Relevant Citations as PubMed and Provides Greater Full-Text Access for Quick, Clinical Nephrology Searches

From:

"David P. Dillard" <[log in to unmask]>

Reply-To:

To support research in sports medicine <[log in to unmask]>

Date:

Wed, 19 Mar 2014 12:23:07 -0400

Content-Type:

TEXT/PLAIN

Parts/Attachments:

Parts/Attachments

TEXT/PLAIN (369 lines)

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MEDICINE :

RESEARCH :

DATABASES: MEDICAL HEALTH BIOSCIENCES BIOLOGY PSYCHOLOGY:

Google Scholar Retrieves Twice as Many Relevant Citations as PubMed
and Provides Greater Full-Text Access
for Quick, Clinical Nephrology Searches

.

.


Google Scholar Retrieves Twice as Many Relevant Citations as PubMed and 
Provides Greater Full-Text Access for Quick, Clinical Nephrology Searches



A Review of:

Shariff, S. Z., Bejaimal, S. A. D., Sontrop, J. M., Iansavichus, A. V., 
Haynes, R. B., Weir, M. A., & Garg, A. X. (2013).
Retrieving clinical evidence:
A comparison of PubMed and Google Scholar for quick clinical 
searches.
Journal of Medical Internet Research,
15(8). 
doi:10.2196/jmir.2624

Reviewed by:

Diana K. Wakimoto

Online Literacy Librarian

California State University, East Bay

Hayward, California, United States of America

Email: [log in to unmask]

Received: 15 Oct. 2013   Accepted: 6 Feb. 2014

Evidence Based Library Information and Practice

Vol 9, No 1 (2014)

p. 36-38

https://ejournals.library.ualberta.ca/
index.php/EBLIP/article/view/20858/16204

.

A shorter URL for the above link:

.

http://tinyurl.com/puhbjvn

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Abstract



Objective  To compare recall and precision of results retrieved by 
searches in PubMed and Google Scholar for clinical nephrology literature.

Design  Survey questionnaire, comparative.

Setting  Canada.

Subjects  Practicing nephrologists with average age of 48 years and who 
have practiced nephrology for an average of 15 years.

.

Methods  The researchers identified 100 systematic reviews in renal 
therapy published between 2001 and 2009. The primary studies cited in the 
systematic reviews served as the reference standard for relevant articles; 
1,574 unique citations were identified and used to measure recall and 
precision.

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snip

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Results  Google Scholars recall for the first 40 records was 21.9% and 
PubMed was 10.9%. Each database contained 78% of the relevant 
literature/reference standard set from the systematic reviews. However, 
15% of the articles were in neither database. Precision results were 
similar (7.6% for Google Scholar and 5.6% for PubMed). Google Scholar had 
more full-text available at 15% of articles versus 5% for PubMed. Google 
Scholar and PubMed had similar numbers of relevant articles when all 
retrieved records were analyzed, but Google Scholar still provided more 
access to free full-text articles.

.

Conclusion  Google Scholar provides better recall and provides more access 
to full-text than PubMed; however, search strings provided by 
nephrologists used in both databases failed to retrieve 80% of relevant 
articles. Therefore improving nephrologists ability to effectively search 
could enhance their ability to implement research in practice helping 
patients.

.

snip

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Commentary

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snip

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This research article is significant in its rigorous comparison of Google 
Scholar and PubMed and provides valuable insight for medical librarians, 
and possibly librarians who work in other fields as well. As more people 
use Google Scholar for quickly finding research to use in clinical 
therapy, it is important that librarians understand the strengths and 
weaknesses of the database and its place in literature searching. As the 
researchers note that most nephrologists view fewer than 40 search 
results, it would be interesting to replicate the study given PubMeds 
recently introduced relevancy ranking, a feature that may have given 
Google Scholar the edge in retrieving more relevant results in the first 
40 records.

.

.

.


Retrieving Clinical Evidence: A Comparison of PubMed and Google Scholar 
for Quick Clinical Searches

Salimah Z Shariff, Shayna AD Bejaimal, Jessica M Sontrop, Arthur V 
Iansavichus, R Brian Haynes, Matthew A Weir, Amit X Garg

J Med Internet Res 2013 (Aug 15); 15(8):e164

http://www.jmir.org/2013/8/e164/

.

.


Salimah Z Shariff1,2, BMath, PhD; Shayna AD Bejaimal1, BMedSc; Jessica M 
Sontrop1,2, PhD; Arthur V Iansavichus1, MLIS; R Brian Haynes3,4, MD, PhD; 
Matthew A Weir1, MD; Amit X Garg1,2,3, MD, PhD

1Kidney Clinical Research Unit, Division of Nephrology, Western 
University, London, ON, Canada
2Department of Epidemiology and Biostatistics, Western University, London, 
ON, Canada
3McMaster University, Department of Clinical Epidemiology and 
Biostatistics, Hamilton, ON, Canada
4Department of Medicine, McMaster University, Hamilton, ON, Canada

Corresponding Author:

Salimah Z Shariff, BMath, PhD

Kidney Clinical Research Unit
Division of Nephrology
Western University
800 Commissioners Rd E. Rm ELL-108
London, ON, N6A 4G5
Canada
Phone: 1 519 685 8500 ext 56555
Fax: 1 519 685 8072
Email: salimah.shariff [at] lhsc.on.ca




--------------------------------------------------------------------------------

ABSTRACT


Background: Physicians frequently search PubMed for information to guide 
patient care. More recently, Google Scholar has gained popularity as 
another freely accessible bibliographic database.


Objective: To compare the performance of searches in PubMed and Google 
Scholar.


Methods: We surveyed nephrologists (kidney specialists) and provided each 
with a unique clinical question derived from 100 renal therapy systematic 
reviews. Each physician provided the search terms they would type into a 
bibliographic database to locate evidence to answer the clinical question. 
We executed each of these searches in PubMed and Google Scholar and 
compared results for the first 40 records retrieved (equivalent to 2 
default search pages in PubMed). We evaluated the recall (proportion of 
relevant articles found) and precision (ratio of relevant to nonrelevant 
articles) of the searches performed in PubMed and Google Scholar. Primary 
studies included in the systematic reviews served as the reference 
standard for relevant articles. We further documented whether relevant 
articles were available as free full-texts.


Results: Compared with PubMed, the average search in Google Scholar 
retrieved twice as many relevant articles (PubMed: 11%; Google Scholar: 
22%; P<.001). Precision was similar in both databases (PubMed: 6%; Google 
Scholar: 8%; P=.07). Google Scholar provided significantly greater access 
to free full-text publications (PubMed: 5%; Google Scholar: 14%; P<.001).


Conclusions: For quick clinical searches, Google Scholar returns twice as 
many relevant articles as PubMed and provides greater access to free 
full-text articles.


Related Article:


Nourbakhsh, E., Nugent, R., Wang, H., Cevik, C., & Nugent, K.
(2012). 
Medical literature searches: A comparison of PubMed and Google Scholar. 
Health Information and Libraries Journal,
29, 214-222. 
doi:10.1111/j.1471-1842.2012.00992.x

http://www.ncbi.nlm.nih.gov/pubmed/22925384

This article is full text in the fee based Academic Search Premier 
database from EBSCOHost and in the Wiley-Blackwell Full Collection
journal aggregation service.


.

.


More on Google Scholar and PubMed

http://www.ncbi.nlm.nih.gov/pubmed?cmd=Link&dbFrom= 
PubMed&from_uid=24360284&holding=f1000%2Cf1000m%2Cisrctn

.

A shorter URL for the above link:

.

http://tinyurl.com/oanzjty


.

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The complete articles may be read at the URLs provided for each.

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Sincerely,
David Dillard
Temple University
(215) 204 - 4584
[log in to unmask]
http://workface.com/e/daviddillard

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