United States National Library of Medicine National Institutes of Health

2008 MEDLINE®/PubMed® Baseline: 16,880,015 Citations Found

Element Name	Citations	Occurrences	Min/Avg/Max Occurrences	Min/Avg/Max Length
PMID	16,880,015	16,880,015	1/1.00/1	1/7.35/8
DateCreated	16,880,015	16,880,015	1/1.00/1	8/8.00/8
DateCompleted	16,880,015	16,880,015	1/1.00/1	8/8.00/8
DateRevised	15,575,767	15,575,767	0/1.00/1	8/8.00/8
ISSN	16,643,503	16,643,503	0/1.00/1	9/9.00/9
IssnType=Electronic		333,490
IssnType=Print		16,310,013
Volume	16,541,762	16,541,762	0/1.00/1	1/2.22/50
Issue	15,296,221	15,296,221	0/1.00/1	1/1.44/30
PubDate	16,880,015	16,880,015	1/1.00/1	4/7.36/55
Title	16,880,015	16,880,015	1/1.00/1	2/37.24/595
ISOAbbreviation	8,829,990	8,829,990	0/1.00/1	3/16.58/61
ArticleTitle	16,880,015	16,880,015	1/1.00/1	2/83.40/1086
MedlinePgn	16,880,015	16,880,015	1/1.00/1	1/5.66/94
ELocationID	0	0	0/0.00/0	0/0.00/0
Valid Yes		0
Valid No		0
EidType=doi		0
EidType=pii		0
EidType=other		0
Abstract
AbstractText	8,955,530	8,955,530	0/1.00/1	50/1177.27/9992
CopyrightInformation	222,930	222,930	0/1.00/1	1/35.75/1000
Affiliation	7,899,086	7,899,086	0/1.00/1	1/96.07/274
Author	16,526,147	53,179,275	0/3.22/744	1/11.40/500
Valid Yes		53,173,356
Valid No		5,919
LastName	16,508,270	53,117,050	0/3.22/743	1/6.91/163
ForeName	16,487,936	53,046,759	0/3.22/743	1/3.00/56
Initials	16,487,935	53,046,757	0/3.22/743	1/1.44/8
Suffix	330,102	349,385	0/1.06/6	2/2.18/3
CollectiveName	57,436	62,225	0/1.08/25	1/42.48/500
LastForeSuffix	16,508,270	53,117,050	0/3.22/743	1/9.93/163
LastInitialsSuffix	16,508,270	53,117,050	0/3.22/743	1/8.36/163
Language	16,880,015	16,907,998	1/1.00/4	3/3.00/3
Grant	1,319,483	2,338,786	0/1.77/69	18/29.40/81
GrantID	1,312,210	2,330,572	0/1.78/69	1/9.06/44
Acronym	1,277,829	2,263,718	0/1.77/68	2/2.00/2
Agency	1,319,483	2,338,786	0/1.77/69	16/18.43/69
DataBank	166,585	169,336	0/1.02/4	6/69.22/47047
DataBankName	166,585	169,336	0/1.02/4	3/6.68/18
AccessionNumber	166,585	1,421,690	0/8.53/5880	2/7.45/14
PublicationType	16,880,015	29,891,063	1/1.77/10	4/17.72/40
ArticleDate	661,794	661,794	0/1.00/1	8/8.00/8
VernacularTitle	3,166,165	3,166,165	0/1.00/1	1/79.39/614
Country	16,880,015	16,880,015	1/1.00/1	4/10.16/35
MedlineTA	16,880,015	16,880,015	1/1.00/1	1/15.43/96
NlmUniqueID	16,880,015	16,880,015	1/1.00/1	7/7.18/9
ISSNLinking	0	0	0/0.00/0	0/0.00/0
Element Name	Citations	Occurrences	Min/Avg/Max Occurrences	Min/Avg/Max Length
Chemical	8,694,703	32,248,303	0/3.71/57	4/20.54/250
RegistryNumber	8,694,703	32,248,303	0/3.71/57	1/4.50/14
NameOfSubstance	8,694,703	32,248,303	0/3.71/57	2/16.04/249
CitationSubset	16,622,601	19,209,294	0/1.16/6	1/1.98/3
GeneSymbol	59,509	126,195	0/2.12/25	1/4.51/41
CommentsCorrections	712,874	861,561	0/1.21/56	8/45.88/835
RetractionOf	794	899	0/1.13/8	32/94.28/344
RetractionIn	871	883	0/1.01/2	27/70.62/341
SummaryForPatientsIn	593	608	0/1.03/3	29/45.26/55
OriginalReportIn	584	608	0/1.04/3	32/47.90/68
CommentOn	346,573	384,570	0/1.11/27	19/45.35/139
CommentIn	309,088	388,459	0/1.26/56	25/47.40/110
ErratumIn	75,596	76,700	0/1.01/3	9/39.70/835
ErratumFor	1,001	1,009	0/1.01/3	8/45.69/104
ReprintIn	536	539	0/1.01/2	30/50.28/92
ReprintOf	486	487	0/1.00/2	30/47.95/77
RepublishedFrom	1,209	1,213	0/1.00/2	19/45.06/110
RepublishedIn	1,002	1,007	0/1.00/2	26/46.91/89
UpdateIn	2,303	2,317	0/1.01/2	37/48.65/58
UpdateOf	2,230	2,230	0/1.00/1	36/48.40/56
PartialRetractionOf	15	16	0/1.07/2	66/112.38/198
PartialRetractionIn	16	16	0/1.00/1	46/89.62/172
MeshHeading	16,493,742	160,430,840	0/9.73/96	2/19.75/193
DescriptorName	16,493,742	160,430,840	0/9.73/96	2/13.79/104
Descriptor Major	8,515,066	15,934,407	0/1.87/96
Descriptor Not Major	15,465,669	144,496,433	0/9.34/61
QualifierName	14,452,243	85,091,118	0/5.89/64	5/11.25/29
Qualifier Major	13,781,442	37,033,449	0/2.69/28
Qualifier Not Major	11,170,388	48,057,669	0/4.30/63
Descriptor and/or Qualifier Major	16,364,739	51,533,848	0/3.15/96
NumberOfReferences	1,311,419	1,311,419	0/1.00/1	1/2.08/7
PersonalNameSubject	145,124	163,055	0/1.12/28	3/11.89/70
LastName	145,124	163,055	0/1.12/28	2/7.45/69
ForeName	137,748	154,357	0/1.12/28	1/3.25/41
Initials	137,745	154,353	0/1.12/28	1/1.43/6
Suffix	1,089	1,117	0/1.03/3	1/2.26/12
LastForeSuffix	145,124	163,055	0/1.12/28	3/10.54/69
LastInitialsSuffix	145,124	163,055	0/1.12/28	3/8.82/69
OtherID	1,210,487	1,303,229	0/1.08/5	1/13.08/391
OtherAbstract
AbstractText	61,948	61,988	0/1.00/2	60/1284.22/4096
CopyrightInformation	1,856	1,856	0/1.00/1	11/16.80/17
Keyword	1,905,475	6,199,869	0/3.25/105	2/16.80/123
Keyword Major	1,831,066	5,135,800	0/2.80/105
Keyword Not Major	154,077	1,064,069	0/6.91/88
GeneralNote	144,737	278,095	0/1.92/32	2/34.31/704
SpaceFlightMission	4,144	19,202	0/4.63/12	6/13.88/28
Element Name	Citations	Occurrences	Min/Avg/Max Occurrences	Min/Avg/Max Length
Investigator	8,959	10,314	0/1.15/6	7/31.04/96
LastName	8,959	10,314	0/1.15/6	2/6.70/16
ForeName	8,951	10,303	0/1.15/6	1/2.70/9
Initials	8,951	10,303	0/1.15/6	1/1.84/2
Suffix	16	16	0/1.00/1	2/2.19/3
Affiliation	8,958	10,313	0/1.15/6	3/19.81/83
LastForeSuffix	8,959	10,314	0/1.15/6	3/9.40/19
LastInitialsSuffix	8,959	10,314	0/1.15/6	3/8.54/18


Average Record Size in Bytes	1,222

Words in Title	Average	11.51	Max	249
Words in Abstract	Average	179.27	Max	1,666

AB Size Zero	7,924,485
AB Size < 1,000	3,565,966
AB Size 1,000 - 1,999	4,860,460
AB Size 2,000 - 2,999	502,333
AB Size 3,000 - 3,999	23,567
AB Size 4,000 - 4,999	2,412
AB Size > 5,000	792

Number of MH Occurrences with NO SHs	97,424,387
Number of MH Occurrences with ONE SH	45,807,469
Number of MH Occurrences with SHs	63,006,453

CollectiveName Counts
Number of Citations containing ONLY CollectiveName			17,877
Number of Citations containing BOTH CollectiveName AND LastName			39,559

MedlineCitation Status Counts:
Completed	0
In-Process	0
In-Data-Review	0
PubMed-not-MEDLINE	257,414
OLDMEDLINE	413,020
MEDLINE	16,209,581

Article PubModel Counts:
Print-Electronic	621,942
Electronic-Print	2,569
Print	16,218,221
Electronic	37,283

JournalIssue CitedMedium Counts:
Internet	337,607
Print	16,542,408

Owner Counts:
Owner	MedlineCitation	GeneralNote	Keyword
NLM	16,758,643	62	1,750,192
NASA	10,539	4,544	12,930
PIP	37,265	63,815	68,952
KIE	32,013	209,632	73,827
HSR	4,938	42	0
HMD	36,617	0	0
SIS	0	0	0
NOTNLM	0	0	0

CitationSubsets Counts:
AIM	1,668,175
B	10,441
C	7,344
D	445,937
E	84,077
F	8,017
H	219,893
IM	13,790,180
J	69,040
K	16,147
N	516,916
OM	1,760,483
Q	193,670
QIS	980
QO	24,166
R	3,603
S	179,177
T	35,444
X	175,604

Publication Types Counts:
Addresses	2,959
Bibliography	13,431
Biography	142,776
Case Reports	1,325,740
Classical Article	4,390
Clinical Conference	5,185
Clinical Trial	437,486
Clinical Trial, Phase I	8,331
Clinical Trial, Phase II	12,938
Clinical Trial, Phase III	3,884
Clinical Trial, Phase IV	358
Comment	346,573
Comparative Study	1,343,932
Congresses	47,531
Consensus Development Conference	5,619
Consensus Development Conference, NIH	575
Controlled Clinical Trial	75,543
Corrected and Republished Article	1,209
Dictionary	508
Directory	6,438
Publication Types Counts (continued):
Duplicate Publication	718
Editorial	210,352
English Abstract	1,407,508
Evaluation Studies	93,595
Festschrift	1,050
Government Publications	182
Guideline	14,163
Historical Article	240,156
In Vitro	345,046
Interview	18,474
Journal Article	15,845,364
Lectures	4,239
Legal Cases	8,263
Legislation	1,659
Letter	604,252
Meta-Analysis	16,411
Multicenter Study	87,966
News	113,724
Newspaper Article	15,788
Overall	21,976
Patient Education Handout	2,268
Periodical Index	310
Practice Guideline	11,395
Published Erratum	1,009
Randomized Controlled Trial	241,734
Research Support, N.I.H., Extramural	184,318
Research Support, N.I.H., Intramural	6,568
Research Support, Non-U.S. Gov't	3,381,712
Research Support, U.S. Gov't, Non-P.H.S.	458,007
Research Support, U.S. Gov't, P.H.S.	1,418,649
Retracted Publication	887
Retraction of Publication	809
Review	1,310,586
Scientific Integrity Review	117
Technical Report	1,506
Twin Study	3,179
Validation Studies	31,717

Last updated: 17 December 2007
First published: 17 December 2007
Metadata| Permanence level: Permanent: Dynamic Content