World's Best Scientists 2026 revealed!
Frederick A. Spencer

Frederick A. Spencer

D-Index & Metrics

Medicine

D-Index
84
Citations
34410
World Ranking
14894
National Ranking
618

Frederick A. Spencer 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 Frederick A. Spencer 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: 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 publications 1,796+

This scientist: 296 publications — 16th percentile

16% of scientists in this discipline score the same or lower.

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

Frederick A. Spencer 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 Frederick A. Spencer 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: 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 D-Index 217+

This scientist: 84 D-Index — 27th percentile

27% of scientists in this discipline score the same or lower.

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

Overview

Frederick A. Spencer is affiliated with McMaster University in Canada. Their research primarily focuses on the field of medicine, with particular attention to internal medicine, cardiology and cardiovascular medicine, emergency medical services, surgery, and public health, environmental and occupational health.

The main topics of Spencer's work include:

  • Venous Thromboembolism Diagnosis and Management
  • Acute Myocardial Infarction Research
  • Central Venous Catheters and Hemodialysis
  • Diagnosis and Treatment of Venous Diseases
  • Clinical Practice Guidelines Implementation
  • Ultrasound in Clinical Applications
  • Atrial Fibrillation Management and Outcomes

Frederick A. Spencer has published in several frequent venues, including:

  • Blood Advances
  • Blood
  • BMJ
  • Ocular Immunology and Inflammation

Some notable recent papers include:

  • Prognostic factors for VTE and bleeding in hospitalized medical patients: a systematic review and meta-analysis, 2020, Blood
  • Risk-assessment models for VTE and bleeding in hospitalized medical patients: an overview of systematic reviews, 2020, Blood Advances
  • Diagnosis of deep vein thrombosis with D-dimer adjusted to clinical probability: prospective diagnostic management study, 2022, BMJ
  • DOACs vs LMWHs in hospitalized medical patients: a systematic review and meta-analysis that informed 2018 ASH guidelines, 2020, Blood Advances
  • Risk models for VTE and bleeding in medical inpatients: systematic identification and expert assessment, 2020, Blood Advances

The scientist collaborates frequently with other researchers such as Mary Cushman, Holger J. Schünemann, Andrea Darzi, Samer G. Karam, and Rana Charide.

Best Publications

  • Risk factors for venous thromboembolism

    Frederick A. Anderson;Frederick A. Spencer

  • Perioperative Management of Antithrombotic Therapy: Antithrombotic Therapy and Prevention of Thrombosis, 9th ed: American College of Chest Physicians Evidence-Based Clinical Practice Guidelines

    James D. Douketis;Alex C. Spyropoulos;Frederick A. Spencer;Michael Mayr

  • Antithrombotic Therapy for Atrial Fibrillation: Antithrombotic Therapy and Prevention of Thrombosis, 9th ed: American College of Chest Physicians Evidence-Based Clinical Practice Guidelines

    John J. You;Daniel E. Singer;Patricia A. Howard;Deirdre A. Lane

  • The epidemiology of venous thromboembolism

    John A. Heit;Frederick A. Spencer;Richard H. White

  • Myocardial Injury after Noncardiac Surgery: A Large, International, Prospective Cohort Study Establishing Diagnostic Criteria, Characteristics, Predictors, and 30-day Outcomes

    Fernando Botto;Pablo Alonso-Coello;Matthew T V Chan;Matthew T V Chan;Juan Carlos Villar

  • Recent trends in the incidence, treatment, and outcomes of patients with STEMI and NSTEMI

    David D. McManus;Joel M. Gore;Jorge L. Yarzebski;Frederick A. Spencer

  • Use of GRADE for assessment of evidence about prognosis: rating confidence in estimates of event rates in broad categories of patients.

    Alfonso Iorio;Frederick A Spencer;Maicon Falavigna;Carolina Alba

  • Thirty-Year Trends (1975 to 2005) in the Magnitude of, Management of, and Hospital Death Rates Associated With Cardiogenic Shock in Patients With Acute Myocardial Infarction A Population-Based Perspective

    Robert J. Goldberg;Frederick A. Spencer;Joel M. Gore;Darleen M. Lessard

  • Impact of age on management and outcome of acute coronary syndrome: observations from the Global Registry of Acute Coronary Events (GRACE).

    Alvaro Avezum;Marcia Makdisse;Frederick Spencer;Joel M. Gore

  • American Society of Hematology 2018 guidelines for management of venous thromboembolism: prophylaxis for hospitalized and nonhospitalized medical patients

    Holger J. Schünemann;Mary Cushman;Allison E. Burnett;Susan R. Kahn

  • Antiplatelet Drugs: Antithrombotic Therapy and Prevention of Thrombosis, 9th ed: American College of Chest Physicians Evidence-Based Clinical Practice Guidelines

    John W. Eikelboom;John W. Eikelboom;Jack Hirsh;Jack Hirsh;Frederick A. Spencer;Trevor P. Baglin

  • Seasonal distribution of acute myocardial infarction in the second National Registry of Myocardial Infarction.

    Frederick A. Spencer;Robert J. Goldberg;Richard C. Becker;Joel M. Gore

  • Primary and Secondary Prevention of Cardiovascular Disease: Antithrombotic Therapy and Prevention of Thrombosis, 9th ed: American College of Chest Physicians Evidence-Based Clinical Practice Guidelines

    Per Olav Vandvik;A. Michael Lincoff;Joel M. Gore;David D. Gutterman

  • Venous thromboembolism prophylaxis in acutely ill hospitalized medical patients: findings from the International Medical Prevention Registry on Venous Thromboembolism.

    Victor F. Tapson;Hervé Decousus;Mario Pini;Beng H. Chong

  • Antithrombotic and Thrombolytic Therapy for Ischemic Stroke: Antithrombotic Therapy and Prevention of Thrombosis, 9th ed: American College of Chest Physicians Evidence-Based Clinical Practice Guidelines

    Maarten G. Lansberg;Martin J. O'Donnell;Pooja Khatri;Eddy S. Lang

  • The Worcester Venous Thromboembolism Study: A Population‐Based Study of the Clinical Epidemiology of Venous Thromboembolism

    Frederick A. Spencer;Cathy Emery;Darleen M. Lessard;Frederick A. Anderson

  • Predictive and Associative Models to Identify Hospitalized Medical Patients at Risk for VTE

    Alex C. Spyropoulos;Frederick A. Anderson;Gordon FitzGerald;Herve Decousus

  • Venous Thromboembolism in the Outpatient Setting

    Frederick A. Spencer;Darleen Lessard;Cathy Emery;George Reed

  • Implications of diabetes in patients with acute coronary syndromes. The Global Registry of Acute Coronary Events

    Kristen Franklin;Robert J. Goldberg;Frederick Spencer;Werner Klein

  • Factors at Admission Associated With Bleeding Risk in Medical Patients: Findings From the IMPROVE Investigators

    Hervé Decousus;Victor F. Tapson;Jean François Bergmann;Beng H. Chong

Frequent Co-Authors

Robert J. Goldberg
Robert J. Goldberg University of Massachusetts Chan Medical School
Joel M. Gore
Joel M. Gore University of Massachusetts Chan Medical School
Richard C. Becker
Richard C. Becker University of Cincinnati
James D. Douketis
James D. Douketis McMaster University
Frederick A. Anderson
Frederick A. Anderson University of Massachusetts Chan Medical School
Gordon H. Guyatt
Gordon H. Guyatt McMaster University
Sam Schulman
Sam Schulman McMaster University
Keith A.A. Fox
Keith A.A. Fox University of Edinburgh
Per Olav Vandvik
Per Olav Vandvik University of Oslo
Jeffrey S. Ginsberg
Jeffrey S. Ginsberg McMaster University

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