World's Best Scientists 2026 revealed!

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Medicine 86 13976 13160 7092 6565 173 31813

William M. Callaghan publications per year

The chart shows the history of publications by William M. Callaghan between 1981 and 2024, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. William M. Callaghan published across 44 years, from 1981 to 2024, averaging 4 papers a year. Output peaked at 20 publications in 2012. 5 of the 178 publications appeared in the last two years.

No. of publications
5 10 15 20
Bar chart. Horizontal axis: year, 1981 to 2024. Vertical axis: number of publications, 0 to 20. Peak 20 publications in 2012. 1981: 1 publication 1982: 0 publications 1983: 0 publications 1984: 0 publications 1985: 0 publications 1986: 0 publications 1987: 0 publications 1988: 0 publications 1989: 0 publications 1990: 0 publications 1991: 0 publications 1992: 0 publications 1993: 0 publications 1994: 0 publications 1995: 0 publications 1996: 0 publications 1997: 0 publications 1998: 0 publications 1999: 0 publications 2000: 1 publication 2001: 0 publications 2002: 3 publications 2003: 2 publications 2004: 1 publication 2005: 8 publications 2006: 3 publications 2007: 15 publications 2008: 7 publications 2009: 11 publications 2010: 15 publications 2011: 11 publications 2012: 20 publications 2013: 8 publications 2014: 14 publications 2015: 17 publications 2016: 9 publications 2017: 8 publications 2018: 5 publications 2019: 9 publications 2020: 3 publications 2021: 1 publication 2022: 1 publication 2023: 4 publications 2024: 1 publication
1981 2024

178 publications in total across all disciplines

View publications per year as a table
William M. Callaghan: publications per year, 1981 to 2024
Year Publications
1981 1
1982 0
1983 0
1984 0
1985 0
1986 0
1987 0
1988 0
1989 0
1990 0
1991 0
1992 0
1993 0
1994 0
1995 0
1996 0
1997 0
1998 0
1999 0
2000 1
2001 0
2002 3
2003 2
2004 1
2005 8
2006 3
2007 15
2008 7
2009 11
2010 15
2011 11
2012 20
2013 8
2014 14
2015 17
2016 9
2017 8
2018 5
2019 9
2020 3
2021 1
2022 1
2023 4
2024 1
Total 178
Download as CSV

William M. Callaghan 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 William M. Callaghan 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, 161–180 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: 173 publications — 1st percentile

1% 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
161–180 155 173
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
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
Download as CSV

William M. Callaghan 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 William M. Callaghan 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, 86–87 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: 86 D-Index — 31st percentile

31% 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
76–77 730
78–79 891
80–81 972
82–83 1,027
84–85 1,003
86–87 960 86
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
Download as CSV

Overview

William M. Callaghan is affiliated with the Centers for Disease Control and Prevention in the United States. Their research primarily focuses on medicine, with a significant concentration in pediatrics, perinatology and child health, and obstetrics and gynecology. Additional subfields include clinical psychology, general health professions, and emergency medicine.

The main topics addressed in their work encompass maternal and perinatal health interventions, maternal and fetal healthcare, emergency and acute care studies, health disparities and outcomes, migration, health and trauma, as well as hermeneutics and narrative identity, and aging, elder care, and social issues.

Frequent coauthors in their research include Alexander C. Ewing, Jean Y. Ko, Elena V. Kuklina, Glen A. Satten, and David A. Goodman.

William M. Callaghan has published in a diverse set of journals, including The Lancet Regional Health - Americas, PubMed, PLoS ONE, Obstetrics and Gynecology, and Paediatric and Perinatal Epidemiology.

Notable papers authored or coauthored by Callaghan feature:

  • Black-White disparities in maternal vulnerability and adverse pregnancy outcomes: an ecological population study in the United States, 2014-2018 (2023) in The Lancet Regional Health - Americas
  • Identifying Cases of Severe Maternal Morbidity: Moving Beyond the Delivery Hospitalization (2022) in PubMed
  • Ranked severe maternal morbidity index for population-level surveillance at delivery hospitalization based on hospital discharge data (2023) in PLoS ONE
  • Maternal Mortality (2020) in Obstetrics and Gynecology
  • Prenatal ultrasound use and risk of autism spectrum disorder: Findings from the case-control Study to Explore Early Development (2023) in Paediatric and Perinatal Epidemiology

Best Publications

  • Maternal Obesity and Risk of Gestational Diabetes Mellitus

    Susan Y. Chu;William M. Callaghan;Shin Y. Kim;Christopher H. Schmid

  • Pandemic 2009 Influenza A(H1N1) Virus Illness Among Pregnant Women in the United States

    Alicia M. Siston;Sonja A. Rasmussen;Margaret A. Honein;Alicia M. Fry

  • Pregnancy-Related Mortality in the United States, 2011–2013

    Andreea A. Creanga;Carla Syverson;Kristi Seed;William M. Callaghan

  • Pregnancy-related Mortality in the United States, 1998 to 2005

    C.J. Berg;W.M. Callaghan;C. Syverson;Z. Henderson

  • Severe Maternal Morbidity Among Delivery and Postpartum Hospitalizations in the United States

    William M. Callaghan;Andreea A. Creanga;Elena V. Kuklina

  • Trends in Postpartum Hemorrhage in High Resource Countries: A Review and Recommendations From the International Postpartum Hemorrhage Collaborative Group

    Marian Knight;William M. Callaghan;Cynthia Berg;Sophie Alexander

  • Hypertensive Disorders and Severe Obstetric Morbidity in the United States

    E.V. Kuklina;C. Ayala;W.M. Callaghan

  • Vital Signs : Pregnancy-Related Deaths, United States, 2011–2015, and Strategies for Prevention, 13 States, 2013–2017

    Emily E. Petersen;Nicole L. Davis;David A Goodman;Shanna Cox

  • Pregnancy-related mortality in the United States, 2006-2010.

    Andreea A. Creanga;Cynthia J. Berg;Carla Syverson;Kristi Seed

  • Opioid Use Disorder Documented at Delivery Hospitalization — United States, 1999–2014

    Sarah C. Haight;Jean Y. Ko;Van T. Tong;Michele K. Bohm

  • The contribution of preterm birth to infant mortality rates in the United States.

    William M. Callaghan;Marian F. MacDorman;Sonja A. Rasmussen;Cheng Qin

  • Racial/Ethnic Disparities in Pregnancy-Related Deaths — United States, 2007–2016

    Emily E. Petersen;Nicole L. Davis;David Goodman;Shanna Cox

  • Maternal obesity and risk of cesarean delivery: a meta-analysis.

    S. Y. Chu;S. Y. Kim;C. H. Schmid;P. M. Dietz

  • Trends in postpartum hemorrhage: United States, 1994-2006.

    William M. Callaghan;Elena V. Kuklina;Cynthia J. Berg

  • Maternal obesity and risk of stillbirth: a metaanalysis

    Susan Y. Chu;Shin Y. Kim;Joseph Lau;Christopher H. Schmid

  • Preventability of pregnancy-related deaths: results of a state-wide review.

    Cynthia J. Berg;Margaret A. Harper;Samuel M. Atkinson;Elizabeth A. Bell

  • Trends in pre-pregnancy obesity in nine states, 1993-2003.

    Shin Y. Kim;Patricia M. Dietz;Lucinda England;Brian Morrow

  • Infant Morbidity and Mortality Attributable to Prenatal Smoking in the U.S.

    Patricia M. Dietz;Lucinda J. England;Carrie K. Shapiro-Mendoza;Van T. Tong

  • Interim Guidelines for Pregnant Women During a Zika Virus Outbreak--United States, 2016.

    Emily E. Petersen;J. Erin Staples;Dana Meaney-Delman;Marc Fischer

  • Pregnancy-Related Mortality in the United States, 1991-1997

    Cynthia J Berg;Jeani Chang;William M Callaghan;Sara J Whitehead

Frequent Co-Authors

Brian T. Bateman
Brian T. Bateman Stanford University
Denise J. Jamieson
Denise J. Jamieson Emory University
Sonja A. Rasmussen
Sonja A. Rasmussen Johns Hopkins University School of Medicine
Christopher H. Schmid
Christopher H. Schmid Brown University
J. Erin Staples
J. Erin Staples Centers for Disease Control and Prevention
William A. Grobman
William A. Grobman Northwestern University
K.S. Joseph
K.S. Joseph University of British Columbia
Joseph Lau
Joseph Lau Chinese University of Hong Kong
Samuel F. Posner
Samuel F. Posner Centers for Disease Control and Prevention
Laura A. Schieve
Laura A. Schieve Centers for Disease Control and Prevention

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Related Online Degrees & Career Pathways

Pursuing a medical career in the USA can follow several flexible pathways, especially with the growing accessibility of online health degrees. Many students start by exploring the cheapest bsn programs online, which provide a cost-effective foundation for those interested in nursing practice and patient care.

Working nurses often seek career advancement through programs that build on their existing credential. The average cost of rn to bsn programs varies widely, but online options allow registered nurses to earn a BSN in a flexible and often more affordable way.

For students holding a non-nursing bachelor’s degree, there are direct entry msn programs for non-nursing majors. These intensive programs rapidly prepare individuals to become registered nurses with advanced skills, opening the doors to specialized roles.

Nursing professionals interested in teaching, research, or leadership may consider earning an advanced degree such as an online phd nursing. This higher-level qualification is key for driving innovation, influencing policy, and contributing to the future of health care.

Best Scientists Citing William M. Callaghan

Trending Scientists

Recently Published Articles