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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Microbiology 63 2732 2504 108 99 270 14101

Eelko Hak publications per year

The chart shows the history of publications by Eelko Hak between 1996 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Eelko Hak published across 30 years, from 1996 to 2025, averaging 17.1 papers a year. Output peaked at 37 publications in 2017. 45 of the 514 publications appeared in the last two years.

No. of publications
10 20 30
Bar chart. Horizontal axis: year, 1996 to 2025. Vertical axis: number of publications, 0 to 37. Peak 37 publications in 2017. 1996: 1 publication 1997: 3 publications 1998: 10 publications 1999: 2 publications 2000: 5 publications 2001: 6 publications 2002: 7 publications 2003: 12 publications 2004: 10 publications 2005: 7 publications 2006: 20 publications 2007: 18 publications 2008: 22 publications 2009: 27 publications 2010: 19 publications 2011: 20 publications 2012: 17 publications 2013: 36 publications 2014: 24 publications 2015: 22 publications 2016: 26 publications 2017: 37 publications 2018: 21 publications 2019: 21 publications 2020: 23 publications 2021: 18 publications 2022: 10 publications 2023: 25 publications 2024: 22 publications 2025: 23 publications
1996 2025

514 publications in total across all disciplines

View publications per year as a table
Eelko Hak: publications per year, 1996 to 2025
Year Publications
1996 1
1997 3
1998 10
1999 2
2000 5
2001 6
2002 7
2003 12
2004 10
2005 7
2006 20
2007 18
2008 22
2009 27
2010 19
2011 20
2012 17
2013 36
2014 24
2015 22
2016 26
2017 37
2018 21
2019 21
2020 23
2021 18
2022 10
2023 25
2024 22
2025 23
Total 514
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Eelko Hak publications per year - data summary

  • Eelko Hak, a Microbiology scholar from University of Groningen, has 514 publications recorded across 30 years, from 1996 to 2025.
  • The oldest publication on record dates to 1996 and the most recent to 2025.
  • The most productive year is 2017, with 37 publications.
  • The least productive year with any output is 1996, with 1 publication.
  • The rate of publication averages 17.1 papers per year over the whole span, or 17.1 per year counting only the 30 years with at least one publication.
  • The last 5 years on the chart (2021-2025) hold 98 publications, 19% of the career total.
  • Split into equal eras - 1996-2005: 63 publications (6.3 per year); 2006-2015: 225 publications (22.5 per year); 2016-2025: 226 publications (22.6 per year).
  • Comparing the opening and closing eras, the overall trend of publication is rising.

Eelko Hak publication distribution in Microbiology in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Microbiology in 2026. The highlighted bar marks where Eelko Hak sits on this spectrum.

No. of scientists
50 100 150 200 250
Bar chart with 64 bars. Horizontal axis: publications, 55–64 to 679+. Vertical axis: number of scientists, 0 to 288. Most scientists, 288, have 135–144 publications. The last bar groups every scientist with 679 publications or more. The highlighted bar, 265–274 publications, is where this scientist sits. 55–64 publications: 8 scientists 65–74 publications: 29 scientists 75–84 publications: 55 scientists 85–94 publications: 112 scientists 95–104 publications: 137 scientists 105–114 publications: 190 scientists 115–124 publications: 235 scientists 125–134 publications: 234 scientists 135–144 publications: 288 scientists 145–154 publications: 265 scientists 155–164 publications: 264 scientists 165–174 publications: 253 scientists 175–184 publications: 276 scientists 185–194 publications: 190 scientists 195–204 publications: 234 scientists 205–214 publications: 208 scientists 215–224 publications: 198 scientists 225–234 publications: 155 scientists 235–244 publications: 161 scientists 245–254 publications: 160 scientists 255–264 publications: 146 scientists 265–274 publications: 139 scientists 275–284 publications: 148 scientists 285–294 publications: 115 scientists 295–304 publications: 96 scientists 305–314 publications: 88 scientists 315–324 publications: 106 scientists 325–334 publications: 65 scientists 335–344 publications: 76 scientists 345–354 publications: 64 scientists 355–364 publications: 62 scientists 365–374 publications: 65 scientists 375–384 publications: 61 scientists 385–394 publications: 34 scientists 395–404 publications: 44 scientists 405–414 publications: 36 scientists 415–424 publications: 35 scientists 425–434 publications: 29 scientists 435–444 publications: 33 scientists 445–454 publications: 34 scientists 455–464 publications: 25 scientists 465–474 publications: 26 scientists 475–484 publications: 20 scientists 485–494 publications: 19 scientists 495–504 publications: 16 scientists 505–514 publications: 17 scientists 515–524 publications: 23 scientists 525–534 publications: 14 scientists 535–544 publications: 14 scientists 545–554 publications: 18 scientists 555–564 publications: 12 scientists 565–574 publications: 7 scientists 575–584 publications: 9 scientists 585–594 publications: 9 scientists 595–604 publications: 9 scientists 605–614 publications: 7 scientists 615–624 publications: 9 scientists 625–634 publications: 7 scientists 635–644 publications: 4 scientists 645–654 publications: 5 scientists 655–664 publications: 6 scientists 665–674 publications: 7 scientists 675–678 publications: 3 scientists 679+ publications: 99 scientists
55–64 publications 679+

This scientist: 270 publications — 70th percentile

70% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 679 publications or more.

View publications distribution as a table
Number of Microbiology scientists by publication count, Research.com 2026 ranking edition. Based on 5,513 ranked scientists.
Publications Scientists This scientist
55–64 8
65–74 29
75–84 55
85–94 112
95–104 137
105–114 190
115–124 235
125–134 234
135–144 288
145–154 265
155–164 264
165–174 253
175–184 276
185–194 190
195–204 234
205–214 208
215–224 198
225–234 155
235–244 161
245–254 160
255–264 146
265–274 139 270
275–284 148
285–294 115
295–304 96
305–314 88
315–324 106
325–334 65
335–344 76
345–354 64
355–364 62
365–374 65
375–384 61
385–394 34
395–404 44
405–414 36
415–424 35
425–434 29
435–444 33
445–454 34
455–464 25
465–474 26
475–484 20
485–494 19
495–504 16
505–514 17
515–524 23
525–534 14
535–544 14
545–554 18
555–564 12
565–574 7
575–584 9
585–594 9
595–604 9
605–614 7
615–624 9
625–634 7
635–644 4
645–654 5
655–664 6
665–674 7
675–678 3
679+ 99
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Eelko Hak publication distribution in Microbiology in 2026 - data summary

  • The chart plots the publication count of all 5,513 Microbiology scientists ranked by Research.com in 2026, grouped into 64 ranges running from 55–64 to 679+ publications.
  • Eelko Hak, a Microbiology scholar from University of Groningen, records 270 publications - the 70th percentile of the discipline.
  • 70% of ranked Microbiology scientists score the same or lower than Eelko Hak, and about 30% score higher.
  • The median of the discipline falls in the 195–204 publications range, and Eelko Hak ranks above the median.
  • The most crowded range is 135–144 publications, holding 288 scientists (5% of the field).
  • 54% of the field sits in the lowest quarter of the value range (up to 205–214 publications), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 679 publications or more, 99 scientists in all (2% of the field).

Eelko Hak D-index placement in Microbiology in 2026

The chart shows the D-index (discipline H-index) distribution of Microbiology scientists ranked by Research.com in 2026. The highlighted bar marks where Eelko Hak sits on this spectrum.

No. of scientists
50 100 150
Bar chart with 88 bars. Horizontal axis: D-Index, 40 to 127+. Vertical axis: number of scientists, 0 to 162. Most scientists, 162, have 58 D-Index. The last bar groups every scientist with 127 D-Index or more. The highlighted bar, 63 D-Index, is where this scientist sits. 40 D-Index: 30 scientists 41 D-Index: 86 scientists 42 D-Index: 90 scientists 43 D-Index: 117 scientists 44 D-Index: 122 scientists 45 D-Index: 123 scientists 46 D-Index: 108 scientists 47 D-Index: 110 scientists 48 D-Index: 106 scientists 49 D-Index: 109 scientists 50 D-Index: 129 scientists 51 D-Index: 111 scientists 52 D-Index: 116 scientists 53 D-Index: 127 scientists 54 D-Index: 134 scientists 55 D-Index: 134 scientists 56 D-Index: 112 scientists 57 D-Index: 136 scientists 58 D-Index: 162 scientists 59 D-Index: 151 scientists 60 D-Index: 139 scientists 61 D-Index: 123 scientists 62 D-Index: 126 scientists 63 D-Index: 144 scientists 64 D-Index: 109 scientists 65 D-Index: 103 scientists 66 D-Index: 124 scientists 67 D-Index: 112 scientists 68 D-Index: 103 scientists 69 D-Index: 131 scientists 70 D-Index: 94 scientists 71 D-Index: 93 scientists 72 D-Index: 96 scientists 73 D-Index: 92 scientists 74 D-Index: 80 scientists 75 D-Index: 66 scientists 76 D-Index: 87 scientists 77 D-Index: 60 scientists 78 D-Index: 73 scientists 79 D-Index: 59 scientists 80 D-Index: 57 scientists 81 D-Index: 55 scientists 82 D-Index: 47 scientists 83 D-Index: 77 scientists 84 D-Index: 50 scientists 85 D-Index: 45 scientists 86 D-Index: 42 scientists 87 D-Index: 41 scientists 88 D-Index: 32 scientists 89 D-Index: 38 scientists 90 D-Index: 35 scientists 91 D-Index: 34 scientists 92 D-Index: 27 scientists 93 D-Index: 26 scientists 94 D-Index: 33 scientists 95 D-Index: 22 scientists 96 D-Index: 37 scientists 97 D-Index: 22 scientists 98 D-Index: 21 scientists 99 D-Index: 22 scientists 100 D-Index: 30 scientists 101 D-Index: 16 scientists 102 D-Index: 20 scientists 103 D-Index: 17 scientists 104 D-Index: 19 scientists 105 D-Index: 16 scientists 106 D-Index: 19 scientists 107 D-Index: 18 scientists 108 D-Index: 14 scientists 109 D-Index: 10 scientists 110 D-Index: 9 scientists 111 D-Index: 7 scientists 112 D-Index: 11 scientists 113 D-Index: 6 scientists 114 D-Index: 15 scientists 115 D-Index: 10 scientists 116 D-Index: 12 scientists 117 D-Index: 7 scientists 118 D-Index: 10 scientists 119 D-Index: 10 scientists 120 D-Index: 11 scientists 121 D-Index: 2 scientists 122 D-Index: 7 scientists 123 D-Index: 12 scientists 124 D-Index: 5 scientists 125 D-Index: 9 scientists 126 D-Index: 6 scientists 127+ D-Index: 95 scientists
40 D-Index 127+

This scientist: 63 D-Index — 52nd percentile

52% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 127 D-Index or more.

View D-Index distribution as a table
Number of Microbiology scientists by D-index, Research.com 2026 ranking edition. Based on 5,513 ranked scientists.
D-Index Scientists This scientist
40 30
41 86
42 90
43 117
44 122
45 123
46 108
47 110
48 106
49 109
50 129
51 111
52 116
53 127
54 134
55 134
56 112
57 136
58 162
59 151
60 139
61 123
62 126
63 144 63
64 109
65 103
66 124
67 112
68 103
69 131
70 94
71 93
72 96
73 92
74 80
75 66
76 87
77 60
78 73
79 59
80 57
81 55
82 47
83 77
84 50
85 45
86 42
87 41
88 32
89 38
90 35
91 34
92 27
93 26
94 33
95 22
96 37
97 22
98 21
99 22
100 30
101 16
102 20
103 17
104 19
105 16
106 19
107 18
108 14
109 10
110 9
111 7
112 11
113 6
114 15
115 10
116 12
117 7
118 10
119 10
120 11
121 2
122 7
123 12
124 5
125 9
126 6
127+ 95
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Eelko Hak D-index placement in Microbiology in 2026 - data summary

  • The chart plots the discipline H-index (D-index) of all 5,513 Microbiology scientists ranked by Research.com in 2026, grouped into 88 ranges running from 40 to 127+ D-Index.
  • Eelko Hak, a Microbiology scholar from University of Groningen, records 63 D-Index - the 52nd percentile of the discipline.
  • 52% of ranked Microbiology scientists score the same or lower than Eelko Hak, and about 48% score higher.
  • The median of the discipline falls in the 63 D-Index range, and Eelko Hak falls inside that same range.
  • The most crowded range is 58 D-Index, holding 162 scientists (3% of the field).
  • 47% of the field sits in the lowest quarter of the value range (up to 61 D-Index), so the distribution leans towards the lower end of the scale.
  • The final bar has no upper bound: it groups every scientist with 127 D-Index or more, 95 scientists in all (2% of the field).

Overview

Eelko Hak is affiliated with the University of Groningen in the Netherlands and has produced extensive research primarily in the field of Medicine. Their work spans several specialized subfields including Cardiology and Cardiovascular Medicine, Epidemiology, Surgery, Geriatrics and Gerontology, and Endocrinology, Diabetes and Metabolism.

The scientist's research interests include a range of topics, with a notable focus on Pharmaceutical Practices and Patient Outcomes, Blood Pressure and Hypertension Studies, and Medication Adherence and Compliance. Other areas covered in their publications are Pharmaceutical Economics and Policy, Renal Transplantation Outcomes and Treatments, Vaccine Coverage and Hesitancy, and Pharmacogenetics and Drug Metabolism.

Frequent coauthors collaborating with Eelko Hak include:

  • Jens Bos
  • Stephan J. L. Bakker
  • Frank Klont
  • Daan J. Touw
  • Daan Kremer

The scientist has contributed multiple papers to prominent publication venues, with the most frequent being Frontiers in Pharmacology and Clinical Epidemiology (five publications each). Other common venues include Nephrology Dialysis Transplantation, BMJ Open, and BMC Public Health.

Selected recent papers authored or co-authored by Eelko Hak are:

  • Interventions to improve medication adherence in tuberculosis patients: a systematic review of randomized controlled studies (2020), npj Primary Care Respiratory Medicine
  • Digital Health Technologies to Improve Medication Adherence and Treatment Outcomes in Patients With Tuberculosis: Systematic Review of Randomized Controlled Trials (2022), Journal of Medical Internet Research
  • Bile acid synthesis, modulation, and dementia: A metabolomic, transcriptomic, and pharmacoepidemiologic study (2021), PLoS Medicine
  • Barriers and strategies to successful tuberculosis treatment in a high-burden tuberculosis setting: a qualitative study from the patient's perspective (2021), BMC Public Health
  • Pneumococcal conjugate vaccines for preventing acute otitis media in children (2020), Cochrane Database of Systematic Reviews

Eelko Hak has also contributed to academic book publications, including a title published by Frontiers Media:

  • Behind a great medical drug there is always a great scientist! (2023)

Best Publications

  • Increased risk of common infections in patients with type 1 and type 2 diabetes mellitus.

    L M A J Muller;K J Gorter;Eelko Hak;W L Goudzwaard

  • Effectiveness of influenza vaccine in the community-dwelling elderly.

    Kristin L. Nichol;James D. Nordin;David B. Nelson;John P. Mullooly

  • Oral Decontamination with Chlorhexidine Reduces the Incidence of Ventilator-associated Pneumonia

    Mirelle Koeman;Andre J. A. M. van der Ven;Eelko Hak;Hans C. A. Joore

  • Beta-blockers may reduce mortality and risk of exacerbations in patients with chronic obstructive pulmonary disease.

    Frans H. Rutten;Nicolaas P. A. Zuithoff;Eelko Hak;Diederick E. Grobbee

  • Influence of high-risk medical conditions on the effectiveness of influenza vaccination among elderly members of 3 large managed-care organizations.

    Eelko Hak;James Nordin;Feifei Wei;John Mullooly

  • Evaluation of impermeable covers for bedding in patients with allergic rhinitis

    Ingrid Terreehorst;Eelko Hak;Albert J. Oosting;Zana Tempels-Pavlica

  • Negative attitude of highly educated parents and health care workers towards future vaccinations in the Dutch childhood vaccination program.

    Eelko Hak;Y Schönbeck;H De Melker;G A Van Essen

  • Impact of rapid detection of viral and atypical bacterial pathogens by real-time polymerase chain reaction for patients with lower respiratory tract infection.

    Jan Jelrik Oosterheert;Anton M van Loon;Rob Schuurman;Andy I M Hoepelman

  • Clinical effectiveness of influenza vaccination in persons younger than 65 years with high-risk medical conditions: the PRISMA study

    Eelko Hak;Erik Buskens;Gerrit A van Essen;Dinny H de Bakker

  • Risk factors of multidrug-resistant tuberculosis: A global systematic review and meta-analysis.

    Ivan Surya Pradipta;Lina Davies Forsman;Judith Bruchfeld;Eelko Hak

  • Rationale and design of CAPITA : a RCT of 13-valent conjugated pneumococcal vaccine efficacy among older adults

    Eelko Hak;D E Grobbee;E A M Sanders;T J M Verheij

  • Influenza- and respiratory syncytial virus-associated mortality and hospitalisations.

    A G S C Jansen;E A M Sanders;A W Hoes;A M van Loon

  • Effect of reduced-dose schedules with 7-valent pneumococcal conjugate vaccine on nasopharyngeal pneumococcal carriage in children: a randomized controlled trial.

    Elske J. M. van Gils;Reinier H. Veenhoven;Eelko Hak;Gerwin D. Rodenburg

  • Effects of pneumococcal conjugate vaccine 2 years after its introduction, the Netherlands.

    Gerwin D. Rodenburg;Sabine C. de Greeff;Angelique G. C. S. Jansen;Hester E. de Melker

  • Invasive pneumococcal disease among adults: associations among serotypes, disease characteristics, and outcome.

    Angelique G. S. C. Jansen;Gerwin D. Rodenburg;Arie van der Ende;Loek van Alphen

  • Association of atopic diseases and attention-deficit/hyperactivity disorder : A systematic review and meta-analyses

    Jurjen van der Schans;Rukiye Çiçek;Tjalling W de Vries;Eelko Hak

  • Clinical Effectiveness of First and Repeat Influenza Vaccination in Adult and Elderly Diabetic Patients

    Ingrid Looijmans-Van den Akker;Theo J.M. Verheij;Erik Buskens;Kristin L. Nichol

  • Usefulness of consecutive C-reactive protein measurements in follow-up of severe community-acquired pneumonia.

    A H W Bruns;J J Oosterheert;E Hak;A I M Hoepelman

  • Confounding by indication in non-experimental evaluation of vaccine effectiveness: the example of prevention of influenza complications

    E. Hak;Th J M Verheij;D. E. Grobbee;Kristin L Nichol

  • Statin treatment and reduced risk of pneumonia in patients with diabetes

    E M W van de Garde;Eelko Hak;P C Souverein;A W Hoes

  • Cost effectiveness of pneumococcal vaccination among Dutch infants: economic analysis of the seven valent pneumococcal conjugated vaccine and forecast for the 10 valent and 13 valent vaccines

    M.H. Rozenbaum;E.A.M. Sanders;A.J. van Hoek;A.G.S.C. Jansen

  • The role of Streptococcus pneumoniae in community-acquired pneumonia among adults in Europe: a meta-analysis

    M.H. Rozenbaum;P. Pechlivanoglou;van der Tjipke Werf;J.R. Lo-Ten-Foe

  • Clinical signs and symptoms predicting influenza infection.

    Eelko Hak;Karl G. M. Moons;Theo J. M. Verheij;Arno W. Hoes

Frequent Co-Authors

Maarten J. Postma
Maarten J. Postma University of Groningen
Arno W. Hoes
Arno W. Hoes Utrecht University
Elisabeth A. M. Sanders
Elisabeth A. M. Sanders Utrecht University
Kristin L. Nichol
Kristin L. Nichol University of Minnesota
Fanny Janssen
Fanny Janssen University of Groningen
Jan Wilschut
Jan Wilschut University Medical Center Groningen
Erik Buskens
Erik Buskens University Medical Center Groningen
Susan S. Jick
Susan S. Jick Boston University
Marc J. M. Bonten
Marc J. M. Bonten Utrecht University
Andy I. M. Hoepelman
Andy I. M. Hoepelman Utrecht University

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