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2016 MEDLINE/PubMed Baseline Excluding OLD MEDLINE Data: 22,347,504 Citations Found

Element Name Citations Occurrences Min/Avg/Max
Occurrences
Min/Avg/Max
Length
PMID 22,347,504 22,347,504 1/1.00/1 1/7.51/8
DateCreated 22,347,504 22,347,504 1/1.00/1 8/8.00/8
DateCompleted 22,347,504 22,347,504 1/1.00/1 8/8.00/8
DateRevised 18,066,173 18,066,173 0/1.00/1 8/8.00/8
ISSN 22,156,942 22,156,942 0/1.00/1 9/9.00/9
   IssnType=Electronic   5,281,848    
   IssnType=Print   16,875,094    
Volume 21,959,835 21,959,835 0/1.00/1 1/2.24/50
Issue 20,876,044 20,876,044 0/1.00/1 1/1.44/60
PubDate 22,347,504 22,347,504 1/1.00/1 4/7.28/38
Title 22,347,504 22,347,504 1/1.00/1 2/37.59/595
ISOAbbreviation 22,346,604 22,346,604 0/1.00/1 1/16.52/96
ArticleTitle 22,347,504 22,347,504 1/1.00/1 2/88.59/1999
MedlinePgn 22,315,452 22,315,452 0/1.00/1 1/5.70/173
ELocationID 5,322,447 5,865,699 0/1.10/2 0/0.00/0
    Valid Yes   5,865,697    
    Valid No   2    
    EIdType=doi   5,280,204    
    EIdType=pii   585,495    
Abstract        
    AbstractText 14,876,919 14,876,919 0/1.00/1 1/1235.25/9996
    CopyrightInformation 1,600,183 1,600,183 0/1.00/1 1/56.41/963
    Identified as Structured Abstract 2,855,191      
       AbstractText 2,855,191 12,070,145 1/4.23/22  
       NLMCategory: UNLABELLED 75,927 75,927    
       NLMCategory: BACKGROUND 1,257,276 1,283,165    
       NLMCategory: OBJECTIVE 1,870,709 1,877,310    
       NLMCategory: METHODS 2,592,904 3,246,254    
       NLMCategory: RESULTS 2,683,734 2,689,117    
       NLMCategory: CONCLUSIONS 2,803,634 2,883,601    
       NLMCategory: UNASSIGNED 12,408 14,771    
Author 21,895,197 84,758,704 0/3.87/5156 1/12.48/489
    Valid Yes   84,739,785    
    Valid No   18,919    
    LastName 21,867,061 84,604,854 0/3.87/5154 1/6.70/129
    ForeName 21,857,653 84,557,802 0/3.87/5154 1/4.31/111
    Initials 21,857,652 84,557,794 0/3.87/5154 1/1.41/8
    Suffix 368,146 388,847 0/1.06/11 1/2.23/20
    CollectiveName 140,587 153,850 0/1.09/29 1/41.72/489
    LastForeSuffix 21,867,061 84,604,854 0/3.87/5154 1/11.02/130
    LastInitialsSuffix 21,867,061 84,604,854 0/3.87/5154 1/8.12/130
    Affiliation 14,052,626 17,469,859 0/1.24/5154 1/112.74/2008
    Identifier 16,027 29,901 0/1.87/37 16/23.90/57
Language 22,347,504 22,393,421 1/1.00/6 3/3.00/3
Grant 2,293,087 5,784,148 0/2.52/357 14/38.33/110
    GrantID 2,194,465 5,600,723 0/2.55/357 1/10.65/66
    Acronym 2,000,905 5,202,561 0/2.60/357 2/2.00/2
    Agency 2,293,087 5,784,148 0/2.52/357 2/13.24/84
    Country 2,293,087 5,784,148 0/2.52/357 5/12.97/14
PublicationType 22,347,504 41,449,605 1/1.85/10 4/18.39/56
DataBank 273,498 278,273 0/1.02/4 5/112.21/47047
    DataBankName 273,498 278,273 0/1.02/4 3/7.68/18
    AccessionNumber 273,498 3,707,581 0/13.56/5880 2/7.85/31
ArticleDate 4,431,327 4,431,327 0/1.00/1 8/8.00/8
VernacularTitle 2,741,865 2,741,865 0/1.00/1 1/79.68/611
Country 22,347,504 22,347,504 1/1.00/1 4/9.93/35
MedlineTA 22,347,504 22,347,504 1/1.00/1 1/15.43/96
NlmUniqueID 22,347,504 22,347,504 1/1.00/1 7/7.31/9
ISSNLinking 21,929,098 21,929,098 0/1.00/1 9/9.00/9
Chemical 11,527,197 44,971,276 0/3.90/58 4/21.22/245
    RegistryNumber 11,527,197 44,971,276 0/3.90/58 1/4.68/15
    NameOfSubstance 11,527,197 44,971,276 0/3.90/58 2/16.54/244
SupplMeshName 61,811 68,172 0/1.10/10 5/23.36/177
    Type=Disease 43,360 45,178 0/1.04/5 5/28.40/177
    Type=Protocol 18,505 22,994 0/1.24/10 5/13.47/43
CitationSubset 20,764,671 23,859,626 0/1.15/6 1/1.99/3
GeneSymbol 59,508 126,194 0/2.12/25 1/4.51/41
CommentsCorrections 3,444,881 74,456,102 0/21.61/4916 8/45.63/827
    RetractionOf 3,765 4,074 0/1.08/20 23/95.24/344
    RetractionIn 3,952 4,005 0/1.01/3 27/57.29/341
    SummaryForPatientsIn 1,171 1,187 0/1.01/3 29/45.84/72
    OriginalReportIn 1,140 1,187 0/1.04/3 32/48.09/68
    CommentOn 629,171 708,409 0/1.13/34 8/45.70/227
    CommentIn 559,799 712,751 0/1.27/57 24/47.57/125
    ErratumIn 142,506 145,098 0/1.02/10 9/44.29/827
    ErratumFor 6,915 7,059 0/1.02/22 8/49.68/566
    ReprintIn 2,572 2,611 0/1.02/4 27/49.96/111
    ReprintOf 2,548 2,558 0/1.00/4 26/49.19/211
    RepublishedFrom 1,459 1,464 0/1.00/2 19/45.46/110
    RepublishedIn 1,267 1,272 0/1.00/2 26/47.19/92
    UpdateIn 5,515 5,547 0/1.01/2 33/50.02/61
    UpdateOf 5,328 5,329 0/1.00/2 31/50.33/100
    PartialRetractionOf 37 38 0/1.03/2 32/115.63/211
    PartialRetractionIn 39 39 0/1.00/1 36/78.69/199
    Cites 2,315,913 72,853,474 0/31.46/4916 22/45.61/198
MeshHeading 20,758,660 226,612,030 0/10.92/68 2/20.38/204
    DescriptorName 20,758,660 226,612,030 0/10.92/68 2/14.13/104
       Descriptor Major 10,400,636 18,159,365 0/1.75/37  
       Descriptor Not Major 20,657,971 204,611,841 0/9.90/63  
    QualifierName 19,498,211 126,349,765 0/6.48/72 5/11.20/29
       Qualifier Major 18,683,340 54,738,492 0/2.93/52  
       Qualifier Not Major 15,759,253 71,611,273 0/4.54/72  
    Descriptor and/or Qualifier Major 20,629,196 70,053,215 0/3.40/50  
PersonalNameSubject 144,322 166,834 0/1.16/28 3/12.31/75
    LastName 144,322 166,834 0/1.16/28 1/7.35/69
    ForeName 139,978 161,087 0/1.15/28 1/3.70/48
    Initials 139,978 161,087 0/1.15/28 1/1.42/6
    Suffix 1,154 1,190 0/1.03/4 2/2.10/3
    LastForeSuffix 144,322 166,834 0/1.16/28 3/10.94/73
    LastInitialsSuffix 144,322 166,834 0/1.16/28 2/8.73/69
NumberOfReferences 1,538,131 1,538,131 0/1.00/1 1/2.10/8
OtherID 3,016,421 3,543,399 0/1.17/6 1/10.04/36
    NLM Source   3,231,564    
OtherAbstract        
    AbstractText 71,259 72,593 0/1.02/5 38/1099.83/4096
    CopyrightInformation 1,855 1,855 0/1.00/1 11/16.80/17
Keyword 1,007,382 6,154,624 0/6.11/245 1/15.94/259
    Keyword Major 80,770 523,600 0/6.48/50  
    Keyword Not Major 1,006,176 5,631,024 0/5.60/245  
GeneralNote 153,509 287,110 0/1.87/32 2/34.24/1226
SpaceFlightMission 4,221 19,546 0/4.63/12 6/13.87/28
InvestigatorList 37,991      
Investigator: Inclusive (pre-2008 Policy) 8,936 10,291 0/1.15/6 7/31.05/96
    LastName 8,936 10,291 0/1.15/6 2/6.69/16
    ForeName 8,928 10,280 0/1.15/6 1/2.70/9
    Initials 8,928 10,280 0/1.15/6 1/1.85/2
    Suffix 16 16 0/1.00/1 2/2.19/3
    Affiliation 8,935 10,290 0/1.15/6 3/19.81/83
    LastForeSuffix 8,936 10,291 0/1.15/6 3/9.40/19
    LastInitialsSuffix 8,936 10,291 0/1.15/6 3/8.54/18
Investigator: 2008 Policy 29,055 1,825,735 0/62.84/3741 2/12.68/517
    LastName 29,055 1,825,735 0/62.84/3741 1/7.00/158
    ForeName 28,975 1,811,074 0/62.50/3740 1/4.49/46
    Initials 28,975 1,811,074 0/62.50/3740 1/1.19/6
    Suffix 2,126 3,773 0/1.77/20 2/2.30/3
    Affiliation 100 893 0/8.93/132 8/97.82/500
    LastForeSuffix 29,055 1,825,735 0/62.84/3741 2/11.45/163
    LastInitialsSuffix 29,055 1,825,735 0/62.84/3741 2/8.18/159
   
Average Record Size in Bytes 1,588
   
Words in Title Average 12.18 Max 341
Words in Abstract Average 186.45 Max 1,696
AB Size Zero 7,470,585
AB Size < 1,000 5,161,916
AB Size 1,000 - 1,999 8,749,726
AB Size 2,000 - 2,999 913,777
AB Size 3,000 - 3,999 44,168
AB Size 4,000 - 4,999 4,965
AB Size > 5,000 2,367
Number of MH Occurrences with NO SHs 136,086,665
Number of MH Occurrences with ONE SH 63,077,126
Number of MH Occurrences with SHs 90,525,365
Number of MH Type=Geographic 3,840,824
CollectiveName, Author, and Investigator Related Counts
Citations containing ONLY CollectiveName 28,136
Citations containing BOTH CollectiveName and Author LastName 112,451
Citations containing BOTH CollectiveName and Investigator LastName 29,021
Citations containing BOTH Author LastName and Investigator LastName 36,079
Citations containing Investigator LastName and Owned by NASA 3,904
Both Investigator and Author Found 0
Investigator Found Without Collective 0
   
MedlineCitation Status Counts:  
   Completed 0
   In-Process 0
   In-Data-Review 0
   PubMed-not-MEDLINE 1,582,833
   OLDMEDLINE 0
   MEDLINE 20,764,671
Article PubModel Counts:  
   Print-Electronic 3,879,332
   Electronic-Print 28,022
   Print 17,912,801
   Electronic-eCollection 152,536
   Electronic 374,813 22,347,504
JournalIssue CitedMedium Counts:  
   Internet 5,295,517
   Print 17,051,987
Owner Counts:
Owner MedlineCitation GeneralNote Keyword OtherAbstract
NLM 22,213,832 8,861 0 0
NASA 10,813 4,616 12,958 409
PIP 38,828 63,793 68,851 53,145
KIE 31,974 209,616 73,817 3,026
HSR 8,378 224 0 0
HMD 43,679 0 0 0
SIS 0 0 0 0
NOTNLM 0 0 852,185 0
AIDS 0 0 0 5,342
Publisher 0 0 0 10,671
Grant Country Occurrences:
   United States 5,395,826
   United Kingdom 318,208
   Italy 11,135
   Canada 51,024
   Austria 4,656
   International 3,276
   Ireland 23
CitationSubsets Counts:
   AIM 2,063,893
   B 10,445
   C 7,570
   D 536,852
   E 93,216
   F 8,016
   H 268,347
   IM 19,456,306
   J 68,939
   K 24,175
   N 642,298
   OM 0
   Q 201,855
   QIS 8,341
   QO 24,428
   R 3,602
   S 189,688
   T 59,149
   X 192,506
Publication Types Counts:
   Addresses 4,608
   Autobiography 3,050
   Bibliography 14,768
   Biography 141,914
   Case Reports 1,720,935
   Classical Article 6,000
   Clinical Conference 6,721
   Clinical Study 0
   Clinical Trial 494,205
   Clinical Trial, Phase I 15,174
   Clinical Trial, Phase II 24,557
   Clinical Trial, Phase III 10,217
   Clinical Trial, Phase IV 1,073
   Comment 629,171
   Comparative Study 1,710,913
   Congresses 62,149
   Consensus Development Conference 9,543
   Consensus Development Conference, NIH 732
   Controlled Clinical Trial 89,643
   Corrected and Republished Article 1,459
   Dictionary 537
   Directory 6,626
   Duplicate Publication 1,399
   Editorial 372,610
   English Abstract 1,773,404
   Evaluation Studies 209,044
   Festschrift 1,516
   Government Publications 190
   Guideline 15,583
   Historical Article 302,472
Publication Types Counts (continued):
   Interactive Tutorial 226
   Interview 25,856
   Introductory Journal Article 35,088
   Journal Article 20,767,739
   Lectures 6,165
   Legal Cases 10,564
   Legislation 1,668
   Letter 872,502
   Meta-Analysis 58,585
   Multicenter Study 188,522
   News 169,942
   Newspaper Article 18,059
   Observational Study 14,937
   Overall 27,749
   Patient Education Handout 4,336
   Periodical Index 325
   Personal Narratives 1,799
   Portraits 41,936
   Practice Guideline 20,489
   Pragmatic Clinical Trial 196
   Published Erratum 6,925
   Randomized Controlled Trial 399,522
   Research Support, American Recovery and Reinvestment Act 1,700
   Research Support, N.I.H., Extramural 827,454
   Research Support, N.I.H., Intramural 39,780
   Research Support, Non-U.S. Gov't 6,021,901
   Research Support, U.S. Gov't, Non-P.H.S. 706,187
   Research Support, U.S. Gov't, P.H.S. 1,450,555
   Retracted Publication 3,987
   Retraction of Publication 3,837
   Review 1,998,906
   Scientific Integrity Review 207
   Technical Report 2,382
   Twin Study 6,694
   Validation Studies 73,922
   Video-Audio Media 8,363
   Webcasts 334
ELocationId EIdType Counts:
   DOI or PII, MedlinePgn Not Found 6,451
   DOI or PII, MedlinePgn Found 4,772,746
   DOI and PII, MedlinePgn Not Found 25,601
   DOI and PII, MedlinePgn Found 517,649
PMID Versioning Counts:
Version 1 22,347,134
Version 2 313
Version 3 37
Version 4 8
Version 5 3
Version 6 3
Version 7 2
Version 8 2
Version 9 1
Version 10 1