World's Best Scientists 2026 revealed!

D-Index & Metrics

Medicine

D-Index
89
Citations
38852
World Ranking
12485
National Ranking
6397

Alexandros N. Vgontzas 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 Alexandros N. Vgontzas sits on this spectrum.

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: 611 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 publications 1,796+

This scientist: 449 publications — 49th percentile

49% of scientists in this discipline score the same or lower.

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

Alexandros N. Vgontzas 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 Alexandros N. Vgontzas sits on this spectrum.

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: 400 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 D-Index 217+

This scientist: 89 D-Index — 38th percentile

38% of scientists in this discipline score the same or lower.

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

Overview

Alexandros N. Vgontzas is affiliated with Pennsylvania State University in the United States. Their research primarily focuses on the fields of Psychology and Medicine, with notable contributions in subfields such as Experimental and Cognitive Psychology, Cognitive Neuroscience, Endocrine and Autonomic Systems, Physiology, and Clinical Psychology.

The research topics covered by Alexandros N. Vgontzas include:

  • Sleep and related disorders
  • Sleep and Wakefulness Research
  • Obstructive Sleep Apnea Research
  • Circadian rhythm and melatonin
  • Neuroscience of respiration and sleep
  • Cardiovascular and Diving-Related Complications
  • Cardiovascular Health and Risk Factors

Frequent publication venues highlight the focus on sleep and cardiovascular health, including:

  • SLEEP
  • Circulation
  • Sleep Medicine
  • Journal of Clinical Sleep Medicine
  • Journal of Sleep Research

Recent papers authored or co-authored by Alexandros N. Vgontzas showcase a range of topics within sleep medicine and its psychological and metabolic impacts:

  • Insomnia and psychological reactions during the COVID-19 outbreak in China, 2020, Journal of Clinical Sleep Medicine
  • Sleep duration and metabolic syndrome: An updated systematic review and meta-analysis, 2021, Sleep Medicine Reviews
  • Association of Pediatric Obstructive Sleep Apnea With Elevated Blood Pressure and Orthostatic Hypertension in Adolescence, 2021, JAMA Cardiology
  • Insomnia disorder: clinical and research challenges for the 21st century, 2021, European Journal of Neurology
  • Insomnia with objective short sleep duration is associated with cognitive impairment: a first look at cardiometabolic contributors to brain health, 2020, SLEEP

Collaborations are a significant part of their work, with frequent co-authors including:

  • Julio Fernández-Mendoza
  • Edward O. Bixler
  • Duanping Liao
  • Susan L. Calhoun
  • Fan He

Best Publications

  • Prevalence of sleep-disordered breathing in women: effects of gender.

    Edward O. Bixler;Alexandros N. Vgontzas;Hung Mo Lin;Thomas Ten Have

  • Effects of age on sleep apnea in men: I. Prevalence and severity.

    Edward O. Bixler;Alexandros N. Vgontzas;Thomas Ten Have;Kathy Tyson

  • Sleep Apnea and Daytime Sleepiness and Fatigue: Relation to Visceral Obesity, Insulin Resistance, and Hypercytokinemia

    Alexandros N. Vgontzas;Dimitris A. Papanicolaou;Edward O. Bixler;Kenneth Hopper

  • Elevation of Plasma Cytokines in Disorders of Excessive Daytime Sleepiness: Role of Sleep Disturbance and Obesity

    Alexandros N. Vgontzas;Dimitris A. Papanicolaou;Edward O. Bixler;Anthony Kales

  • Adverse Effects of Modest Sleep Restriction on Sleepiness, Performance, and Inflammatory Cytokines

    Alexandros N. Vgontzas;E. Zoumakis;E. O. Bixler;H. M. Lin

  • Chronic Insomnia Is Associated with Nyctohemeral Activation of the Hypothalamic-Pituitary-Adrenal Axis: Clinical Implications

    Alexandros N. Vgontzas;Edward O. Bixler;Hung Mo Lin;Paolo Prolo

  • Excessive Daytime Sleepiness in a General Population Sample: The Role of Sleep Apnea, Age, Obesity, Diabetes, and Depression

    E. O. Bixler;A. N. Vgontzas;H.-M. Lin;S. L. Calhoun

  • Insomnia with objective short sleep duration is associated with a high risk for hypertension.

    Alexandros N. Vgontzas;Duanping Liao;Edward O. Bixler;George P. Chrousos

  • Sleep disordered breathing in children in a general population sample: prevalence and risk factors.

    Edward O. Bixler;Alexandros N. Vgontzas;Hung Mo Lin;Duanping Liao

  • Association of hypertension and sleep-disordered breathing.

    Edward O. Bixler;Alexandros N. Vgontzas;Hung Mo Lin;Thomas Ten Have

  • Sleep apnea is a manifestation of the metabolic syndrome.

    Alexandros N. Vgontzas;Edward O. Bixler;George P. Chrousos

  • Insomnia with objective short sleep duration: the most biologically severe phenotype of the disorder.

    Alexandros N. Vgontzas;Julio Fernandez-Mendoza;Duanping Liao;Edward O. Bixler

  • Sleep apnea and sleep disruption in obese patients.

    Alexandros N. Vgontzas;Tjiauw L. Tan;Edward O. Bixler;Louis F. Martin

  • Insomnia With Objective Short Sleep Duration Is Associated With Type 2 Diabetes: A population-based study

    Alexandros N. Vgontzas;Duanping Liao;Slobodanka Pejovic;Susan Calhoun

  • Circadian interleukin-6 secretion and quantity and depth of sleep.

    Alexandros N. Vgontzas;Dimitris A. Papanicolaou;Edward O. Bixler;Angela Lotsikas

  • The Functional and Clinical Significance of the 24-Hour Rhythm of Circulating Glucocorticoids

    Henrik Oster;Etienne Challet;Volker Ott;Emanuela Arvat

  • Chronic insomnia and activity of the stress system: A preliminary study

    Alexandros N. Vgontzas;Constantine Tsigos;Edward O. Bixler;Constantine A. Stratakis

  • Polycystic Ovary Syndrome Is Associated With Obstructive Sleep Apnea and Daytime Sleepiness: Role of Insulin Resistance

    Alexandros N. Vgontzas;Richard S. Legro;Edward O. Bixler;Allison Grayev

  • Sleep, the hypothalamic–pituitary–adrenal axis, and cytokines: multiple interactions and disturbances in sleep disorders

    Alexandros N. Vgontzas;George P. Chrousos

  • Obesity without sleep apnea is associated with daytime sleepiness.

    Alexandras N. Vgontzas;Edward O. Bixler;Tjiauw Ling Tan;Deborah Kantner

Frequent Co-Authors

Edward O. Bixler
Edward O. Bixler Pennsylvania State University
Susan L. Calhoun
Susan L. Calhoun Pennsylvania State University
George P. Chrousos
George P. Chrousos National and Kapodistrian University of Athens
Anthony Kales
Anthony Kales Pennsylvania State University
Panagiotis G. Simos
Panagiotis G. Simos University of Crete
Susan Dickerson Mayes
Susan Dickerson Mayes Pennsylvania State University
Dimitrios T. Boumpas
Dimitrios T. Boumpas National and Kapodistrian University of Athens
Alfredo Rodríguez-Muñoz
Alfredo Rodríguez-Muñoz Complutense University of Madrid
Philip W. Gold
Philip W. Gold National Institutes of Health
Richard S. Legro
Richard S. Legro Pennsylvania State University

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