World's Best Scientists 2026 revealed!

D-Index & Metrics

Social Sciences and Humanities

D-Index
60
Citations
13594
World Ranking
1469
National Ranking
700

Onyebuchi A. Arah publication distribution in Social Sciences and Humanities in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Social Sciences and Humanities in 2026. The highlighted bar marks where Onyebuchi A. Arah sits on this spectrum.

44–53 publications: 28 scientists 54–63 publications: 61 scientists 64–73 publications: 161 scientists 74–83 publications: 225 scientists 84–93 publications: 301 scientists 94–103 publications: 390 scientists 104–113 publications: 406 scientists 114–123 publications: 474 scientists 124–133 publications: 453 scientists 134–143 publications: 434 scientists 144–153 publications: 407 scientists 154–163 publications: 411 scientists 164–173 publications: 391 scientists 174–183 publications: 313 scientists 184–193 publications: 319 scientists 194–203 publications: 304 scientists 204–213 publications: 285 scientists 214–223 publications: 246 scientists 224–233 publications: 213 scientists 234–243 publications: 170 scientists 244–253 publications: 167 scientists 254–263 publications: 162 scientists 264–273 publications: 138 scientists 274–283 publications: 138 scientists 284–293 publications: 113 scientists 294–303 publications: 106 scientists 304–313 publications: 95 scientists 314–323 publications: 101 scientists 324–333 publications: 81 scientists 334–343 publications: 69 scientists 344–353 publications: 56 scientists 354–363 publications: 36 scientists 364–373 publications: 42 scientists 374–383 publications: 41 scientists 384–393 publications: 44 scientists 394–403 publications: 27 scientists 404–413 publications: 30 scientists 414–423 publications: 20 scientists 424–433 publications: 29 scientists 434–443 publications: 29 scientists 444–453 publications: 25 scientists 454–463 publications: 19 scientists 464–473 publications: 21 scientists 474–483 publications: 11 scientists 484–493 publications: 17 scientists 494–503 publications: 7 scientists 504–513 publications: 6 scientists 514–523 publications: 12 scientists 524–533 publications: 10 scientists 534–543 publications: 7 scientists 544–553 publications: 6 scientists 554–563 publications: 12 scientists 564–569 publications: 8 scientists 570+ publications: 100 scientists
44 publications 570+

This scientist: 273 publications — 83rd percentile

83% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 570 publications or more.

Onyebuchi A. Arah D-index placement in Social Sciences and Humanities in 2026

The chart shows the D-index (discipline H-index) distribution of Social Sciences and Humanities scientists ranked by Research.com in 2026. The highlighted bar marks where Onyebuchi A. Arah sits on this spectrum.

30 D-Index: 177 scientists 31 D-Index: 210 scientists 32 D-Index: 222 scientists 33 D-Index: 188 scientists 34 D-Index: 181 scientists 35 D-Index: 243 scientists 36 D-Index: 261 scientists 37 D-Index: 272 scientists 38 D-Index: 278 scientists 39 D-Index: 300 scientists 40 D-Index: 297 scientists 41 D-Index: 308 scientists 42 D-Index: 313 scientists 43 D-Index: 300 scientists 44 D-Index: 269 scientists 45 D-Index: 260 scientists 46 D-Index: 228 scientists 47 D-Index: 251 scientists 48 D-Index: 203 scientists 49 D-Index: 186 scientists 50 D-Index: 187 scientists 51 D-Index: 166 scientists 52 D-Index: 138 scientists 53 D-Index: 141 scientists 54 D-Index: 131 scientists 55 D-Index: 137 scientists 56 D-Index: 109 scientists 57 D-Index: 129 scientists 58 D-Index: 95 scientists 59 D-Index: 105 scientists 60 D-Index: 106 scientists 61 D-Index: 86 scientists 62 D-Index: 94 scientists 63 D-Index: 77 scientists 64 D-Index: 79 scientists 65 D-Index: 59 scientists 66 D-Index: 68 scientists 67 D-Index: 51 scientists 68 D-Index: 49 scientists 69 D-Index: 40 scientists 70 D-Index: 43 scientists 71 D-Index: 40 scientists 72 D-Index: 50 scientists 73 D-Index: 46 scientists 74 D-Index: 43 scientists 75 D-Index: 45 scientists 76 D-Index: 45 scientists 77 D-Index: 30 scientists 78 D-Index: 25 scientists 79 D-Index: 31 scientists 80 D-Index: 29 scientists 81 D-Index: 18 scientists 82 D-Index: 21 scientists 83 D-Index: 26 scientists 84 D-Index: 15 scientists 85 D-Index: 15 scientists 86 D-Index: 19 scientists 87 D-Index: 19 scientists 88 D-Index: 12 scientists 89 D-Index: 7 scientists 90 D-Index: 19 scientists 91 D-Index: 20 scientists 92 D-Index: 13 scientists 93 D-Index: 9 scientists 94 D-Index: 13 scientists 95 D-Index: 8 scientists 96 D-Index: 7 scientists 97 D-Index: 6 scientists 98 D-Index: 6 scientists 99 D-Index: 6 scientists 100+ D-Index: 97 scientists
30 D-Index 100+

This scientist: 60 D-Index — 82nd percentile

82% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 100 D-Index or more.

Overview

Onyebuchi A. Arah is affiliated with the University of California, Los Angeles in the United States and has contributed extensively to the field of Medicine, with a particular focus on Public Health, Environmental and Occupational Health, Pediatrics, Perinatology and Child Health, Obstetrics and Gynecology, General Health Professions, as well as Statistics and Probability.

Their research spans multiple main topics including COVID-19 Impact on Reproduction, Obesity, Physical Activity, Diet, Birth, Development, and Health, Advanced Causal Inference Techniques, Pregnancy and Medication Impact, Health Systems, Economic Evaluations, Quality of Life, and Vaccine Coverage and Hesitancy.

Among their recent papers are the following:

  • Childhood overweight and obesity and timing of puberty in boys and girls: cohort and sibling-matched analyses (2020) published in International Journal of Epidemiology
  • Gestational Diabetes Mellitus and the Risks of Overall and Type-Specific Cardiovascular Diseases: A Population- and Sibling-Matched Cohort Study (2021) published in Diabetes Care
  • Maternal Plasma Perfluoroalkyl Substances and Miscarriage: A Nested Case-Control Study in the Danish National Birth Cohort (2020) published in Environmental Health Perspectives
  • Causal and Associational Language in Observational Health Research: A Systematic Evaluation (2022) published in American Journal of Epidemiology
  • Erratum to: Childhood overweight and obesity and timing of puberty in boys and girls: cohort and sibling-matched analyses (2021) published in International Journal of Epidemiology

Onyebuchi A. Arah frequently collaborates with several coauthors, reflecting a diverse and interdisciplinary approach to research. These coauthors include:

  • Annette K. Regan
  • Roch A. Nianogo
  • Cecilia Høst Ramlau-Hansen
  • Andreas Ernst
  • Beate Ritz

Their work is predominantly published in well-known academic venues such as:

  • International Journal of Epidemiology
  • American Journal of Epidemiology
  • Epidemiology
  • Scientific Reports
  • bioRxiv (Cold Spring Harbor Laboratory)

The research output shows a strong commitment to addressing complex health issues through cohort studies, nested case-control studies, and methodological evaluations, contributing data and analyses especially related to childhood health, pregnancy outcomes, and epidemiological methodology.

Best Publications

  • A conceptual framework for the OECD Health Care Quality Indicators Project.

    Onyebuchi A. Arah;Gert P. Westert;Jeremy Hurst;Niek S. Klazinga

  • Severe hypoglycaemia and cardiovascular disease: systematic review and meta-analysis with bias analysis.

    Atsushi Goto;Onyebuchi A Arah;Onyebuchi A Arah;Maki Goto;Yasuo Terauchi

  • Conceptual frameworks for health systems performance: a quest for effectiveness, quality, and improvement

    O. A. Arah;N. S. Klazinga;D. M. J. Delnoij;A. H. A. Ten Asbroek

  • A performance assessment framework for hospitals: the WHO regional office for Europe PATH project.

    Jeremy Veillard;F. Champagne;N. Klazinga;V. Kazandjian

  • Bias formulas for sensitivity analysis of unmeasured confounding for general outcomes, treatments, and confounders

    Tyler J. VanderWeele;Onyebuchi A. Arah

  • Maternal Diabetes During Pregnancy and Early Onset of Cardiovascular Disease in Offspring: Population Based Cohort Study With 40 Years of Follow Up

    Yongfu Yu;Onyebuchi A Arah;Zeyan Liew;Sven Cnattingius

  • A Systematic Review of the Impact of Physicians’ Occupational Well-Being on the Quality of Patient Care

    Renée A. Scheepers;Benjamin C. M. Boerebach;Onyebuchi A. Arah;Onyebuchi A. Arah;Maas Jan Heineman

  • Bias from conditioning on live birth in pregnancy cohorts: an illustration based on neurodevelopment in children after prenatal exposure to organic pollutants

    Zeyan Liew;Jørn Olsen;Xin Cui;Beate Ritz

  • Comparing Mortality of Peritoneal and Hemodialysis Patients in the First 2 Years of Dialysis Therapy: A Marginal Structural Model Analysis

    Lilia R. Lukowsky;Rajnish Mehrotra;Leeka Kheifets;Onyebuchi A. Arah;Onyebuchi A. Arah

  • Autism spectrum disorders and race, ethnicity, and nativity: a population-based study.

    Tracy A Becerra;Ondine S von Ehrenstein;Julia E Heck;Jorn Olsen

  • A systematic review of the effects of residency training on patient outcomes.

    Renée M van der Leeuw;Kiki M J M H Lombarts;Onyebuchi A Arah;Maas Jan Heineman

  • The effect of certification and accreditation on quality management in 4 clinical services in 73 European hospitals

    Charles D. Shaw;Oliver Groene;Daan Botje;Rosa Sunol

  • Parkinson disease and smoking revisited Ease of quitting is an early sign of the disease

    Beate Ritz;Pei-Chen Lee;Christina F. Lassen;Onyebuchi A. Arah

  • Agent-Based Modeling of Noncommunicable Diseases: A Systematic Review

    Roch A. Nianogo;Onyebuchi A. Arah

  • The role of causal reasoning in understanding Simpson's paradox, Lord's paradox, and the suppression effect: covariate selection in the analysis of observational studies

    Onyebuchi A Arah

  • Patterns and predictors of early mortality in incident hemodialysis patients: new insights.

    Lilia R. Lukowsky;Leeka Kheifets;Onyebuchi A. Arah;Allen R. Nissenson

  • Association of incident obstructive sleep apnoea with outcomes in a large cohort of US veterans

    Miklos Z Molnar;Istvan Mucsi;Marta Novak;Zoltan Szabo

  • Developing a national performance indicator framework for the Dutch health system

    A. H. A. ten Asbroek;O. A. Arah;J. Geelhoed;T. Custers

  • On the relationship between individual and population health

    Onyebuchi A. Arah;Onyebuchi A. Arah

  • Doctor performance assessment in daily practise: does it help doctors or not? A systematic review.

    Karlijn Overeem;Marjan J Faber;Onyebuchi A Arah;Onyebuchi A Arah;Glyn Elwyn;Glyn Elwyn

  • Bias from Conditioning on Live Birth in Pregnancy Cohorts: An Illustration Based on Neurodevelopment in Children after Prenatal Exposure to Organic Pollutants

    Zeyan Liew;Jørn Olsen;Beate Ritz;Onyebuchi Arah

Frequent Co-Authors

Niek S. Klazinga
Niek S. Klazinga University of Amsterdam
Jørn Olsen
Jørn Olsen Aarhus University
Karien Stronks
Karien Stronks University of Amsterdam
Kamyar Kalantar-Zadeh
Kamyar Kalantar-Zadeh University of California, Irvine
Allen R. Nissenson
Allen R. Nissenson University of California, Los Angeles
Beate Ritz
Beate Ritz University of California, Los Angeles
Miklos Z. Molnar
Miklos Z. Molnar University of Utah
Nanna Lien
Nanna Lien University of Oslo
Anton E. Kunst
Anton E. Kunst University of Amsterdam
Albert J. J. A. Scherpbier
Albert J. J. A. Scherpbier Maastricht University

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