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

 

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