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2013 MEDLINE®/PubMed® Baseline: 21,508,439 Citations Found

Element Name
Citations
Occurrences
Min/Avg/Max
Occurrences
Min/Avg/Max
Length
PMID
21,508,439
21,508,439
1/1.00/1
1/7.49/8
DateCreated
21,508,439
21,508,439
1/1.00/1
8/8.00/8
DateCompleted
21,508,439
21,508,439
1/1.00/1
8/8.00/8
DateRevised
17,480,543
17,480,543
0/1.00/1
8/8.00/8
ISSN
21,218,317
21,218,317
0/1.00/1
9/9.00/9
   IssnType=Electronic
0
3,037,453
0
0
   IssnType=Print
0
18,180,864
0
0
Volume
21,125,515
21,125,515
0/1.00/1
1/2.22/50
Issue
19,609,012
19,609,012
0/1.00/1
1/1.46/48
PubDate
21,508,439
21,508,439
1/1.00/1
4/7.35/38
Title
21,508,439
21,508,439
1/1.00/1
2/37.63/595
ISOAbbreviation
21,508,391
21,508,391
0/1.00/1
1/16.52/96
ArticleTitle
21,508,439
21,508,439
1/1.00/1
2/85.03/1086
MedlinePgn
21,498,818
21,498,818
0/1.00/1
1/5.68/176
ELocationID
2,916,567
2,940,990
0/1.01/2
0/0.00/0
    Valid Yes
0
2,940,990
0
0
    Valid No
0
0
0
0
    EIdType=doi
0
2,890,675
0
0
    EIdType=pii
0
50,315
0
0
Abstract
0
0
0
0
    AbstractText
12,477,159
12,477,159
0/1.00/1
50/1210.24/10160
    CopyrightInformation
831,298
831,298
0/1.00/1
1/50.44/422
    Identified as Structured Abstract
2,038,059
0
0
0
Affiliation
11,532,227
11,532,227
0/1.00/1
1/101.97/505
Author
21,036,966
73,292,514
0/3.48/3173
1/12.12/500
    Valid Yes
0
73,278,825
0
0
    Valid No
0
13,689
0
0
    LastName
21,012,776
73,176,846
0/3.48/3172
1/6.82/163
    ForeName
20,984,406
73,089,185
0/3.48/3172
1/3.81/111
    Initials
20,984,406
73,089,184
0/3.48/3172
1/1.42/8
    Suffix
384,055
405,693
0/1.06/7
2/2.19/3
    CollectiveName
105,954
115,668
0/1.09/29
1/42.03/500
    LastForeSuffix
21,012,776
73,176,846
0/3.48/3172
1/10.65/163
    LastInitialsSuffix
21,012,776
73,176,846
0/3.48/3172
1/8.26/163
Language
21,508,439
21,550,537
1/1.00/5
3/3.00/3
Grant
1,871,189
4,043,287
0/2.16/332
14/37.74/100
    GrantID
1,793,709
3,931,789
0/2.19/332
1/10.41/66
    Acronym
1,709,531
3,770,787
0/2.21/332
2/2.00/2
    Agency
1,871,189
4,043,287
0/2.16/332
2/12.78/54
    Country
1,871,189
4,043,287
0/2.16/332
5/12.97/14
DataBank
223,213
226,771
0/1.02/4
5/101.68/47047
    DataBankName
223,213
226,771
0/1.02/4
3/7.23/18
    AccessionNumber
223,213
2,766,150
0/12.39/5880
2/7.74/14
PublicationType
21,508,439
38,443,473
1/1.79/10
4/17.98/56
ArticleDate
2,631,159
2,631,159
0/1.00/1
8/8.00/8
VernacularTitle
3,417,420
3,417,420
0/1.00/1
1/79.20/614
Country
21,508,439
21,508,439
1/1.00/1
4/10.16/35
MedlineTA
21,508,439
21,508,439
1/1.00/1
1/15.43/96
NlmUniqueID
21,508,439
21,508,439
1/1.00/1
7/7.25/9

 

Element Name
Citations
Occurrences
Min/Avg/Max
Occurrences
Min/Avg/Max
Length
ISSNLinking
21,027,741
21,027,741
0/1.00/1
9/9.00/9
Chemical
10,789,999
40,636,056
0/3.77/58
4/20.71/250
RegistryNumber
10,789,999
40,636,056
0/3.77/58
1/4.35/15
NameOfSubstance
10,789,999
40,636,056
0/3.77/58
2/16.36/249
SupplMeshName
30,797
35,419
0/1.15/10
5/19.62/111
Type=Disease
14,093
14,564
0/1.03/5
6/28.44/111
Type=Protocol
16,731
20,855
0/1.25/10
5/13.46/43
CitationSubset
20,439,059
23,352,028
0/1.14/6
1/1.99/3
GeneSymbol
59,509
126,195
0/2.12/25
1/4.51/41
CommentsCorrections
2,478,767
40,972,279
0/16.53/4881
8/45.16/835
RetractionOf
2,262
2,461
0/1.09/11
25/95.07/344
RetractionIn
2,298
2,325
0/1.01/2
27/61.50/341
SummaryForPatientsIn
984
998
0/1.01/3
29/45.40/62
OriginalReportIn
953
998
0/1.05/3
32/47.92/68
CommentOn
505,368
555,667
0/1.10/32
8/45.60/215
CommentIn
449,905
561,276
0/1.25/57
24/48.17/125
ErratumIn
113,835
115,737
0/1.02/10
9/42.91/835
ErratumFor
1,104
1,129
0/1.02/7
8/46.09/104
ReprintIn
1,994
2,022
0/1.01/3
27/50.22/92
ReprintOf
1,943
1,953
0/1.01/4
26/49.59/173
RepublishedFrom
1,397
1,402
0/1.00/2
19/45.47/110
RepublishedIn
1,201
1,206
0/1.00/2
26/47.30/92
UpdateIn
3,963
3,995
0/1.01/2
33/49.55/59
UpdateOf
3,948
3,949
0/1.00/2
31/49.49/100
PartialRetractionOf
32
33
0/1.03/2
32/113.18/211
PartialRetractionIn
33
33
0/1.00/1
36/85.00/199
Cites
1,526,069
39,717,095
0/26.03/4881
22/45.11/198
MeshHeading
20,275,470
203,441,419
0/10.03/103
2/20.17/204
DescriptorName
20,275,470
203,441,419
0/10.03/103
2/14.02/104
Descriptor Major
10,518,069
19,405,250
0/1.84/103
0
Descriptor Not Major
19,068,543
180,642,290
0/9.47/63
0
QualifierName
17,970,221
111,324,231
0/6.19/71
5/11.23/29
Qualifier Major
17,206,407
48,406,707
0/2.81/32
0
Qualifier Not Major
14,029,478
62,917,524
0/4.48/71
0
Descriptor and/or Qualifier Major
20,142,176
65,507,641
0/3.25/103
0
NumberOfReferences
1,546,692
1,546,692
0/1.00/1
1/2.10/8
PersonalNameSubject
162,070
183,674
0/1.13/28
3/12.40/70
LastName
162,070
183,674
0/1.13/28
1/7.42/69
ForeName
155,676
175,791
0/1.13/28
1/3.76/48
Initials
155,676
175,791
0/1.13/28
1/1.42/6
Suffix
1,224
1,256
0/1.03/3
1/2.22/12
LastForeSuffix
162,070
183,674
0/1.13/28
3/11.04/69
LastInitialsSuffix
162,070
183,674
0/1.13/28
2/8.80/69
OtherID
3,350,926
3,737,905
0/1.12/5
1/11.23/391
NLM Source
0
2,191,515
0
0
OtherAbstract
0
0
0
0
AbstractText
61,923
61,963
0/1.00/2
60/1284.17/4096
CopyrightInformation
1,856
1,856
0/1.00/1
11/16.80/17

 

Element Name
Citations
Occurrences
Min/Avg/Max
Occurrences
Min/Avg/Max
Length
Keyword
2,135,960
6,532,654
0/3.06/105
1/16.92/123
Keyword Major
2,061,532
5,468,882
0/2.65/105
0
Keyword Not Major
154,070
1,063,772
0/6.90/88
0
GeneralNote
147,436
280,800
0/1.90/32
2/34.30/704
SpaceFlightMission
4,189
19,399
0/4.63/12
6/13.87/28
InvestigatorList
26,055
0
0
0
Investigator: Inclusive (pre-2008 Policy)
8,945
10,300
0/1.15/6
7/31.05/96
LastName
8,945
10,300
0/1.15/6
2/6.70/16
ForeName
8,937
10,289
0/1.15/6
1/2.70/9
Initials
8,937
10,289
0/1.15/6
1/1.85/2
Suffix
16
16
0/1.00/1
2/2.19/3
Affiliation
8,944
10,299
0/1.15/6
3/19.81/83
LastForeSuffix
8,945
10,300
0/1.15/6
3/9.40/19
LastInitialsSuffix
8,945
10,300
0/1.15/6
3/8.55/18
Investigator: 2008 Policy
17,110
1,011,436
0/59.11/3068
2/12.45/164
LastName
17,110
1,011,436
0/59.11/3068
1/7.05/158
ForeName
17,061
1,002,751
0/58.77/3068
1/4.25/47
Initials
17,061
1,002,751
0/58.77/3068
1/1.19/6
Suffix
1,316
2,222
0/1.69/20
2/2.31/3
Affiliation
21
21
0/1.00/1
8/22.52/43
LastForeSuffix
17,110
1,011,436
0/59.11/3068
2/11.27/163
LastInitialsSuffix
17,110
1,011,436
0/59.11/3068
2/8.24/159

 

Element Name
Citations
Average Record Size in Bytes
1,423
Words in Title Average
11.71
Words in Title Max
249
Words in Abstract Average
183.02
Words in Abstract Max
1,669
AB Size Zero
9,031,280
AB Size <1,000
4,589,545
AB Size 1,000 - 1,999
7,121,245
AB Size 2,000 - 2,999
725,914
AB Size 3,000 - 3,999
35,163
AB Size 4,000 - 4,999
3,677
AB Size >5,000
1,615
Number of MH Occurrences with NO SHs
122,706,439
Number of MH Occurrences with ONE SH
57,190,783
Number of MH Occurrences with SHs
80,734,980
Number of MH Type=Geographic
3,393,879

 

CollectiveName, Author, and Investigator Related
Counts
Citations containing ONLY CollectiveName 24,190
Citations containing BOTH CollectiveName and Author LastName 81,764
Citations containing BOTH CollectiveName and Investigator LastName 17,085
Citations containing BOTH Author LastName and Investigator LastName 24,862
Citations containing Investigator LastName and Owned by NASA 3,911
Both Investigator and Author Found 24,862
Investigator Found Without Collective 8,970

 

MedlineCitation Status 
Counts
Completed
0
In-Process
0
In-Data-Review
0
PubMed-not-MEDLINE
1,069,380
OLDMEDLINE
375,572
MEDLINE
20,063,487

 

Article PubModel
Counts
Print-Electronic
2,416,487
Electronic-Print
7,419
Print
18,873,037
Electronic
211,496

 

JournalIssue CitedMedium
Counts
Internet
3,101,842
Print
18,406,597

 

Owner
MedlineCitation
GeneralNote
Keyword
OtherAbstract
NLM
21,377,219
2,694
1,980,703
0
NASA
10,725
4,570
12,946
409
PIP
37,383
63,802
68,925
53,186
KIE
31,968
209,640
73,831
3,026
HSR
7,342
94
0
0
HMD
43,802
0
0
0
SIS
0
0
0
0
NOTNLM
0
0
0
0
AIDS
0
0
0
5,342

 

CitationSubsets
Counts
AIM
1,908,474
B
10,445
C
7,404
D
512,495
E
89,657
F
8,017
H
252,925
IM
17,209,591
J
69,013
K
22,088
N
604,035
OM
1,999,101
Q
202,140
QIS
5,449
QO
24,474
R
3,603
S
185,921
T
50,510
X
186,686

 

Grant Country
Counts
United States
3,873,335
United Kingdom
133,883
Italy
8,783
Canada
24,914
Austria
2,350
Ireland
22

 

Publication Types
Counts
Addresses
3,990
Bibliography
14,849
Biography
159,891
Case Reports
1,594,330
Classical Article
5,474
Clinical Conference
6,231
Clinical Trial
471,113
Clinical Trial, Phase I
12,290
Clinical Trial, Phase II
19,756
Clinical Trial, Phase III
7,185
Clinical Trial, Phase IV
737
Comment
505,369
Comparative Study
1,589,258
Congresses
57,816
Consensus Development Conference
8,111
Consensus Development Conference, NIH
692
Controlled Clinical Trial
84,637
Corrected and Republished Article
1,397
Dictionary
535
Directory
6,609
Duplicate Publication
1,001
Editorial
308,413
English Abstract
1,642,620
Evaluation Studies
170,661
Festschrift
1,363
Government Publications
188
Guideline
15,120
Historical Article
287,338
In Vitro
366,561
Interview
22,902
Journal Article
20,151,122
Lectures
5,535
Legal Cases
9,887
Legislation
1,666
Letter
761,332
Meta-Analysis
35,465
Multicenter Study
146,475
News
147,369
Newspaper Article
17,723
Overall
26,328
Patient Education Handout
3,617
Periodical Index
320
Portraits
36,841
Practice Guideline
17,016
Published Erratum
1,121
Randomized Controlled Trial
333,396
Research Support, American Recovery and Reinvestment Act
644
Research Support, N.I.H., Extramural
584,115
Research Support, N.I.H., Intramural
27,872
Research Support, Non-U.S. Gov't
4,907,594
Research Support, U.S. Gov't, Non-P.H.S.
607,779
Research Support, U.S. Gov't, P.H.S.
1,437,952
Retracted Publication
2,327
Retraction of Publication
2,313
Review
1,717,713
Scientific Integrity Review
170
Technical Report
2,139
Twin Study
5,386
Validation Studies
57,863
Video-Audio Media
3,073
Webcasts
254

 

ELocationId EIdType
Counts
DOI or PII, MedlinePgn Not Found
2,788
DOI or PII, MedlinePgn Found
2,889,356
DOI and PII, MedlinePgn Not Found
6,833
DOI and PII, MedlinePgn Found
17,590

 

PMID Versioning
Counts
Version 1
21,508,354
Version 2
55
Version 3
12
Version 4
6
Version 5
3
Version 6
3
Version 7
2
Version 8
2
Version 9
1
Version 10
1