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Stephan Ruhrmann

Stephan Ruhrmann

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Medicine 75 19107 17943 1004 963 378 21322

Stephan Ruhrmann publications per year

The chart shows the history of publications by Stephan Ruhrmann between 1991 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Stephan Ruhrmann published across 35 years, from 1991 to 2025, averaging 12.5 papers a year. Output peaked at 31 publications in 2006. 34 of the 437 publications appeared in the last two years.

No. of publications
10 20 30
Bar chart. Horizontal axis: year, 1991 to 2025. Vertical axis: number of publications, 0 to 31. Peak 31 publications in 2006. 1991: 1 publication 1992: 7 publications 1993: 13 publications 1994: 4 publications 1995: 1 publication 1996: 5 publications 1997: 1 publication 1998: 1 publication 1999: 1 publication 2000: 9 publications 2001: 0 publications 2002: 3 publications 2003: 4 publications 2004: 7 publications 2005: 11 publications 2006: 31 publications 2007: 16 publications 2008: 31 publications 2009: 10 publications 2010: 21 publications 2011: 10 publications 2012: 25 publications 2013: 15 publications 2014: 22 publications 2015: 19 publications 2016: 16 publications 2017: 9 publications 2018: 7 publications 2019: 16 publications 2020: 25 publications 2021: 29 publications 2022: 18 publications 2023: 15 publications 2024: 17 publications 2025: 17 publications
1991 2025

437 publications in total across all disciplines

View publications per year as a table
Stephan Ruhrmann: publications per year, 1991 to 2025
Year Publications
1991 1
1992 7
1993 13
1994 4
1995 1
1996 5
1997 1
1998 1
1999 1
2000 9
2001 0
2002 3
2003 4
2004 7
2005 11
2006 31
2007 16
2008 31
2009 10
2010 21
2011 10
2012 25
2013 15
2014 22
2015 19
2016 16
2017 9
2018 7
2019 16
2020 25
2021 29
2022 18
2023 15
2024 17
2025 17
Total 437
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Stephan Ruhrmann publications per year - data summary

  • Stephan Ruhrmann, a Medicine scholar from University of Cologne, has 437 publications recorded across 35 years, from 1991 to 2025.
  • The oldest publication on record dates to 1991 and the most recent to 2025.
  • The most productive years are 2006 and 2008, with 31 publications each.
  • The least productive years with any output are 1991, 1995, 1997, 1998 and others, with 1 publication each.
  • 1 of the 35 years in the span carries no publications at all (2001).
  • The rate of publication averages 12.5 papers per year over the whole span, or 12.9 per year counting only the 34 years with at least one publication.
  • The last 5 years on the chart (2021-2025) hold 96 publications, 22% of the career total.
  • Split into equal eras - 1991-2002: 46 publications (3.8 per year); 2003-2014: 203 publications (16.9 per year); 2015-2025: 188 publications (17.1 per year).
  • Comparing the opening and closing eras, the overall trend of publication is rising.

Stephan Ruhrmann publication distribution in Medicine in 2026

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

No. of scientists
200 400 600 800
Bar chart with 86 bars. Horizontal axis: publications, 101–120 to 1,796+. Vertical axis: number of scientists, 0 to 922. Most scientists, 922, have 341–360 publications. The last bar groups every scientist with 1,796 publications or more. The highlighted bar, 361–380 publications, is where this scientist sits. 101–120 publications: 5 scientists 121–140 publications: 26 scientists 141–160 publications: 73 scientists 161–180 publications: 155 scientists 181–200 publications: 230 scientists 201–220 publications: 363 scientists 221–240 publications: 487 scientists 241–260 publications: 545 scientists 261–280 publications: 722 scientists 281–300 publications: 768 scientists 301–320 publications: 834 scientists 321–340 publications: 895 scientists 341–360 publications: 922 scientists 361–380 publications: 838 scientists 381–400 publications: 861 scientists 401–420 publications: 918 scientists 421–440 publications: 806 scientists 441–460 publications: 771 scientists 461–480 publications: 751 scientists 481–500 publications: 713 scientists 501–520 publications: 617 scientists 521–540 publications: 610 scientists 541–560 publications: 537 scientists 561–580 publications: 504 scientists 581–600 publications: 509 scientists 601–620 publications: 396 scientists 621–640 publications: 386 scientists 641–660 publications: 371 scientists 661–680 publications: 340 scientists 681–700 publications: 336 scientists 701–720 publications: 307 scientists 721–740 publications: 259 scientists 741–760 publications: 230 scientists 761–780 publications: 228 scientists 781–800 publications: 217 scientists 801–820 publications: 204 scientists 821–840 publications: 186 scientists 841–860 publications: 177 scientists 861–880 publications: 155 scientists 881–900 publications: 139 scientists 901–920 publications: 145 scientists 921–940 publications: 116 scientists 941–960 publications: 133 scientists 961–980 publications: 91 scientists 981–1,000 publications: 96 scientists 1,001–1,020 publications: 77 scientists 1,021–1,040 publications: 70 scientists 1,041–1,060 publications: 63 scientists 1,061–1,080 publications: 77 scientists 1,081–1,100 publications: 49 scientists 1,101–1,120 publications: 54 scientists 1,121–1,140 publications: 49 scientists 1,141–1,160 publications: 51 scientists 1,161–1,180 publications: 35 scientists 1,181–1,200 publications: 39 scientists 1,201–1,220 publications: 26 scientists 1,221–1,240 publications: 37 scientists 1,241–1,260 publications: 36 scientists 1,261–1,280 publications: 27 scientists 1,281–1,300 publications: 32 scientists 1,301–1,320 publications: 28 scientists 1,321–1,340 publications: 17 scientists 1,341–1,360 publications: 30 scientists 1,361–1,380 publications: 28 scientists 1,381–1,400 publications: 17 scientists 1,401–1,420 publications: 21 scientists 1,421–1,440 publications: 15 scientists 1,441–1,460 publications: 12 scientists 1,461–1,480 publications: 12 scientists 1,481–1,500 publications: 18 scientists 1,501–1,520 publications: 14 scientists 1,521–1,540 publications: 17 scientists 1,541–1,560 publications: 15 scientists 1,561–1,580 publications: 6 scientists 1,581–1,600 publications: 2 scientists 1,601–1,620 publications: 12 scientists 1,621–1,640 publications: 11 scientists 1,641–1,660 publications: 8 scientists 1,661–1,680 publications: 5 scientists 1,681–1,700 publications: 5 scientists 1,701–1,720 publications: 10 scientists 1,721–1,740 publications: 12 scientists 1,741–1,760 publications: 14 scientists 1,761–1,780 publications: 6 scientists 1,781–1,795 publications: 5 scientists 1,796+ publications: 100 scientists
101–120 publications 1,796+

This scientist: 378 publications — 34th percentile

34% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,796 publications or more.

View publications distribution as a table
Number of Medicine scientists by publication count, Research.com 2026 ranking edition. Based on 20,134 ranked scientists.
Publications Scientists This scientist
101–120 5
121–140 26
141–160 73
161–180 155
181–200 230
201–220 363
221–240 487
241–260 545
261–280 722
281–300 768
301–320 834
321–340 895
341–360 922
361–380 838 378
381–400 861
401–420 918
421–440 806
441–460 771
461–480 751
481–500 713
501–520 617
521–540 610
541–560 537
561–580 504
581–600 509
601–620 396
621–640 386
641–660 371
661–680 340
681–700 336
701–720 307
721–740 259
741–760 230
761–780 228
781–800 217
801–820 204
821–840 186
841–860 177
861–880 155
881–900 139
901–920 145
921–940 116
941–960 133
961–980 91
981–1,000 96
1,001–1,020 77
1,021–1,040 70
1,041–1,060 63
1,061–1,080 77
1,081–1,100 49
1,101–1,120 54
1,121–1,140 49
1,141–1,160 51
1,161–1,180 35
1,181–1,200 39
1,201–1,220 26
1,221–1,240 37
1,241–1,260 36
1,261–1,280 27
1,281–1,300 32
1,301–1,320 28
1,321–1,340 17
1,341–1,360 30
1,361–1,380 28
1,381–1,400 17
1,401–1,420 21
1,421–1,440 15
1,441–1,460 12
1,461–1,480 12
1,481–1,500 18
1,501–1,520 14
1,521–1,540 17
1,541–1,560 15
1,561–1,580 6
1,581–1,600 2
1,601–1,620 12
1,621–1,640 11
1,641–1,660 8
1,661–1,680 5
1,681–1,700 5
1,701–1,720 10
1,721–1,740 12
1,741–1,760 14
1,761–1,780 6
1,781–1,795 5
1,796+ 100
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Stephan Ruhrmann publication distribution in Medicine in 2026 - data summary

  • The chart plots the publication count of all 20,134 Medicine scientists ranked by Research.com in 2026, grouped into 86 ranges running from 101–120 to 1,796+ publications.
  • Stephan Ruhrmann, a Medicine scholar from University of Cologne, records 378 publications - the 34th percentile of the discipline.
  • 34% of ranked Medicine scientists score the same or lower than Stephan Ruhrmann, and about 66% score higher.
  • The median of the discipline falls in the 441–460 publications range, and Stephan Ruhrmann ranks below the median.
  • The most crowded range is 341–360 publications, holding 922 scientists (5% of the field).
  • 64% of the field sits in the lowest quarter of the value range (up to 521–540 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 1,796 publications or more, 100 scientists in all (<1% of the field).

Stephan Ruhrmann D-index placement in Medicine in 2026

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

No. of scientists
250 500 750 1,000
Bar chart with 75 bars. Horizontal axis: D-Index, 70–71 to 217+. Vertical axis: number of scientists, 0 to 1,027. Most scientists, 1,027, have 82–83 D-Index. The last bar groups every scientist with 217 D-Index or more. The highlighted bar, 74–75 D-Index, is where this scientist sits. 70–71 D-Index: 226 scientists 72–73 D-Index: 391 scientists 74–75 D-Index: 574 scientists 76–77 D-Index: 730 scientists 78–79 D-Index: 891 scientists 80–81 D-Index: 972 scientists 82–83 D-Index: 1,027 scientists 84–85 D-Index: 1,003 scientists 86–87 D-Index: 960 scientists 88–89 D-Index: 970 scientists 90–91 D-Index: 922 scientists 92–93 D-Index: 839 scientists 94–95 D-Index: 808 scientists 96–97 D-Index: 779 scientists 98–99 D-Index: 668 scientists 100–101 D-Index: 611 scientists 102–103 D-Index: 630 scientists 104–105 D-Index: 513 scientists 106–107 D-Index: 541 scientists 108–109 D-Index: 445 scientists 110–111 D-Index: 429 scientists 112–113 D-Index: 399 scientists 114–115 D-Index: 393 scientists 116–117 D-Index: 318 scientists 118–119 D-Index: 302 scientists 120–121 D-Index: 287 scientists 122–123 D-Index: 255 scientists 124–125 D-Index: 256 scientists 126–127 D-Index: 252 scientists 128–129 D-Index: 230 scientists 130–131 D-Index: 179 scientists 132–133 D-Index: 168 scientists 134–135 D-Index: 163 scientists 136–137 D-Index: 159 scientists 138–139 D-Index: 134 scientists 140–141 D-Index: 134 scientists 142–143 D-Index: 118 scientists 144–145 D-Index: 109 scientists 146–147 D-Index: 106 scientists 148–149 D-Index: 74 scientists 150–151 D-Index: 79 scientists 152–153 D-Index: 80 scientists 154–155 D-Index: 87 scientists 156–157 D-Index: 57 scientists 158–159 D-Index: 74 scientists 160–161 D-Index: 69 scientists 162–163 D-Index: 60 scientists 164–165 D-Index: 53 scientists 166–167 D-Index: 39 scientists 168–169 D-Index: 42 scientists 170–171 D-Index: 32 scientists 172–173 D-Index: 39 scientists 174–175 D-Index: 40 scientists 176–177 D-Index: 28 scientists 178–179 D-Index: 19 scientists 180–181 D-Index: 23 scientists 182–183 D-Index: 31 scientists 184–185 D-Index: 18 scientists 186–187 D-Index: 20 scientists 188–189 D-Index: 22 scientists 190–191 D-Index: 13 scientists 192–193 D-Index: 21 scientists 194–195 D-Index: 12 scientists 196–197 D-Index: 12 scientists 198–199 D-Index: 14 scientists 200–201 D-Index: 15 scientists 202–203 D-Index: 13 scientists 204–205 D-Index: 10 scientists 206–207 D-Index: 8 scientists 208–209 D-Index: 4 scientists 210–211 D-Index: 12 scientists 212–213 D-Index: 11 scientists 214–215 D-Index: 10 scientists 216 D-Index: 4 scientists 217+ D-Index: 98 scientists
70–71 D-Index 217+

This scientist: 75 D-Index — 6th percentile

6% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 217 D-Index or more.

View D-Index distribution as a table
Number of Medicine scientists by D-index, Research.com 2026 ranking edition. Based on 20,134 ranked scientists.
D-Index Scientists This scientist
70–71 226
72–73 391
74–75 574 75
76–77 730
78–79 891
80–81 972
82–83 1,027
84–85 1,003
86–87 960
88–89 970
90–91 922
92–93 839
94–95 808
96–97 779
98–99 668
100–101 611
102–103 630
104–105 513
106–107 541
108–109 445
110–111 429
112–113 399
114–115 393
116–117 318
118–119 302
120–121 287
122–123 255
124–125 256
126–127 252
128–129 230
130–131 179
132–133 168
134–135 163
136–137 159
138–139 134
140–141 134
142–143 118
144–145 109
146–147 106
148–149 74
150–151 79
152–153 80
154–155 87
156–157 57
158–159 74
160–161 69
162–163 60
164–165 53
166–167 39
168–169 42
170–171 32
172–173 39
174–175 40
176–177 28
178–179 19
180–181 23
182–183 31
184–185 18
186–187 20
188–189 22
190–191 13
192–193 21
194–195 12
196–197 12
198–199 14
200–201 15
202–203 13
204–205 10
206–207 8
208–209 4
210–211 12
212–213 11
214–215 10
216 4
217+ 98
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Stephan Ruhrmann D-index placement in Medicine in 2026 - data summary

  • The chart plots the discipline H-index (D-index) of all 20,134 Medicine scientists ranked by Research.com in 2026, grouped into 75 ranges running from 70–71 to 217+ D-Index.
  • Stephan Ruhrmann, a Medicine scholar from University of Cologne, records 75 D-Index - the 6th percentile of the discipline.
  • 6% of ranked Medicine scientists score the same or lower than Stephan Ruhrmann, and about 94% score higher.
  • The median of the discipline falls in the 94–95 D-Index range, and Stephan Ruhrmann ranks below the median.
  • The most crowded range is 82–83 D-Index, holding 1,027 scientists (5% of the field).
  • 70% of the field sits in the lowest quarter of the value range (up to 106–107 D-Index), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 217 D-Index or more, 98 scientists in all (<1% of the field).

Overview

Stephan Ruhrmann is affiliated with the University of Cologne in Germany. Their research spans multiple disciplines, primarily focusing on medicine, neuroscience, and psychology. Within these broader fields, they have contributed extensively to subfields such as psychiatry and mental health, cognitive neuroscience, experimental and cognitive psychology, clinical psychology, and biological psychiatry.

The scientist's work centers on topics including schizophrenia research and treatment, functional brain connectivity studies, mental health research topics, tryptophan and brain disorders, mental health and psychiatry in general, bipolar disorder and treatment, as well as child and adolescent psychosocial and emotional development.

Stephan Ruhrmann has authored several research papers with notable publications in high-impact journals. Some of their recent papers include:

  • Multimodal Machine Learning Workflows for Prediction of Psychosis in Patients With Clinical High-Risk Syndromes and Recent-Onset Depression, 2020, JAMA Psychiatry
  • Microglial autophagy-associated phagocytosis is essential for recovery from neuroinflammation, 2020, Science Immunology
  • Development of Proteomic Prediction Models for Transition to Psychotic Disorder in the Clinical High-Risk State and Psychotic Experiences in Adolescence, 2020, JAMA Psychiatry
  • Dysregulated Lipid Metabolism Precedes Onset of Psychosis, 2020, Biological Psychiatry
  • Atypical processing of uncertainty in individuals at risk for psychosis, 2020, NeuroImage Clinical

Their collaborations include frequent co-authorship with several researchers, reflecting a diverse network in their research community. These frequent co-authors are:

  • Stefan Borgwardt
  • Christos Pantelis
  • Rachel Upthegrove
  • Raimo K. R. Salokangas
  • Nikolaos Koutsouleris

Stephan Ruhrmann's publications have appeared in multiple venues, with frequent contributions to journals specializing in psychiatry and related fields. Notable publication venues include:

  • Schizophrenia Bulletin
  • Biological Psychiatry
  • European Psychiatry
  • Psychological Medicine
  • The British Journal of Psychiatry

Best Publications

  • The Psychosis High-Risk State: A Comprehensive State-of-the-Art Review

    Paolo Fusar-Poli;Stefan Borgwardt;Andreas Bechdolf;Jean Addington

  • Genomic Relationships, Novel Loci, and Pleiotropic Mechanisms across Eight Psychiatric Disorders

    Phil H. Lee;Verneri Anttila;Hyejung Won;Yen-Chen A. Feng

  • Prediction of psychosis in adolescents and young adults at high risk: results from the prospective European prediction of psychosis study

    Stephan Ruhrmann;Frauke Schultze-Lutter;Raimo K. R. Salokangas;Markus Heinimaa

  • Revealing the complex genetic architecture of obsessive-compulsive disorder using meta-analysis

    Paul D. Arnold;Kathleen D. Askland;Cristina Barlassina;Laura Bellodi

  • EPA guidance on the early intervention in clinical high risk states of psychoses.

    Frauke Schultze-Lutter;Chantal Michel;Stefanie Julia Schmidt;Benno Karl Edgar Schimmelmann

  • Genome-wide association study of obsessive-compulsive disorder.

    S. E. Stewart;D. Yu;J. M. Scharf;B. M. Neale

  • Intervention in individuals at ultra-high risk for psychosis: a review and future directions.

    Patrick D. McGorry;Barnaby Nelson;G. Paul Amminger;Andreas Bechdolf

  • Prediction Models of Functional Outcomes for Individuals in the Clinical High-Risk State for Psychosis or with Recent-Onset Depression: A Multimodal, Multisite Machine Learning Analysis

    Nikolaos Koutsouleris;Lana Kambeitz-Ilankovic;Stephan Ruhrmann;Marlene Rosen

  • Prediction of psychosis by mismatch negativity.

    Mitja Bodatsch;Stephan Ruhrmann;Michael Wagner;Ralf Müller

  • Partitioning the heritability of tourette syndrome and obsessive compulsive disorder reveals differences in genetic architecture

    Lea K. Davis;Dongmei Yu;Clare L. Keenan;Eric R. Gamazon

  • Identifying Gene-Environment Interactions in Schizophrenia: Contemporary Challenges for Integrated, Large-scale Investigations

    Jim van Os;Jim van Os;Bart P. Rutten;Inez Myin-Germeys;Philippe Delespaul

  • Application of transcranial magnetic stimulation in treatment of drug‐resistant major depression—a report of two cases

    G. Höflich;S. Kasper;A. Hufnagel;S. Ruhrmann

  • Early detection and secondary prevention of psychosis: facts and visions.

    Heinz Häfner;Kurt Maurer;Stephan Ruhrmann;Andreas Bechdolf

  • Preventing progression to first-episode psychosis in early initial prodromal states

    Andreas Bechdolf;Michael Wagner;Stephan Ruhrmann;Susan Harrigan

  • Disorder, not just state of risk: meta-analysis of functioning and quality of life in people at high risk of psychosis.

    Paolo Fusar-Poli;Matteo Rocchetti;Alberto Sardella;Alessia Avila

  • Sensory Gating in Schizophrenia: P50 and N100 Gating in Antipsychotic-Free Subjects at Risk, First-Episode, and Chronic Patients

    Anke Brockhaus-Dumke;Frauke Schultze-Lutter;Ralf Mueller;Indira Tendolkar

  • Basic Symptoms and Ultrahigh Risk Criteria: Symptom Development in the Initial Prodromal State

    Frauke Schultze-Lutter;Stephan Ruhrmann;Julia Berning;Wolfgang Maier

  • Early detection and intervention in the initial prodromal phase of schizophrenia.

    S Ruhrmann;F Schultze-Lutter;J Klosterkötter

  • Neurocognitive indicators for a conversion to psychosis: comparison of patients in a potentially initial prodromal state who did or did not convert to a psychosis.

    Ralf Pukrop;Stephan Ruhrmann;Frauke Schultze-Lutter;Andreas Bechdolf

  • Genome wide meta-analysis identifies genomic relationships, novel loci, and pleiotropic mechanisms across eight psychiatric disorders

    Lee Ph;Anttila;Won H

Frequent Co-Authors

Joachim Klosterkötter
Joachim Klosterkötter University of Cologne
Michael Wagner
Michael Wagner TU Dresden
Stefan Borgwardt
Stefan Borgwardt University of Lübeck
Stephen J. Wood
Stephen J. Wood University of Melbourne
Nikolaos Koutsouleris
Nikolaos Koutsouleris Ludwig-Maximilians-Universität München
Peter Falkai
Peter Falkai Ludwig-Maximilians-Universität München
Ralf Pukrop
Ralf Pukrop University of Cologne
Philip McGuire
Philip McGuire University of Oxford
Christos Pantelis
Christos Pantelis University of Melbourne
Paolo Brambilla
Paolo Brambilla University of Milan

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