Roopal Thakkar

8.4k citations

142 papers · 5.3k · 4 hit papers · h-index 29

Impact in

Genetics top 0.5%
- Inflammatory Bowel Disease
Epidemiology top 0.5%
- Microscopic Colitis
- Autoimmune and Inflammatory Disorders

Papers in

Genetics 111
- Inflammatory Bowel Disease 111
Epidemiology 90
- Microscopic Colitis 88
- Autoimmune and Inflammatory Disorders 12

Co-authors: William J. Sandborn (67 shared papers)Andreas Lazar (44 shared papers)Geert D’Haens (25 shared papers)Walter Reinisch (19 shared papers)Jean‐Frédéric Colombel (11 shared papers)Anne Robinson (49 shared papers)Douglas C. Wolf (13 shared papers)Martina Kron (12 shared papers)
Journals: Gastroenterology (28 papers)Inflammatory Bowel Diseases (27 papers)The American Journal of Gastroenterology (21 papers)Journal of Crohn s and Colitis (19 papers)Gut (10 papers)
Partner nations: United States Germany France

In The Last Decade

Roopal Thakkar

124 papers receiving 5.1k citations

Roopal Thakkar's Hit Papers

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Adalimumab for induction of clinical remission in moderately to severely active ulcerative colitis: results of a randomised controlled trial 2011 · 683 citations

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if any of the following hold:

it has ≥500 total citations;
it reaches ≥1.5× the top-1% citation threshold for papers in the same subfield and year (the threshold is the minimum needed to enter the top 1%, not the average within it);
it reaches the top citation threshold in at least one of its specific research topics.

2011 Gut
2011 Gastroenterology
2007 JAMA
2002 Hypertension

Peers

Countries citing papers authored by Roopal Thakkar

Since Specialization

Citations

This map shows the geographic impact of Roopal Thakkar's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Roopal Thakkar with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Roopal Thakkar more than expected).

Fields of papers citing papers by Roopal Thakkar

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Roopal Thakkar. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Roopal Thakkar. The network helps show where Roopal Thakkar may publish in the future.

Co-authors

The 25 scholars most cited alongside Roopal Thakkar, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with Roopal Thakkar Line = papers co-authored together Roopal Thakkar links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

Showing the 20 most-cited of 142 papers — load more, or switch the sort, to bring in the rest.

#	Work
1	Adalimumab Induces and Maintains Clinical Remission in Patients With Moderate-to-Severe Ulcerative Colitis Gastroenterology ·William J. Sandborn, Gert Van Assche, Walter Reinisch, Jean‐Frédéric Colombel, Geert D’Haens, Douglas C. Wolf, Martina Kron, Mary Beth Tighe, Andreas Lazar, Roopal Thakkar Hit paper breakdown →	2011	946
2	Adalimumab for induction of clinical remission in moderately to severely active ulcerative colitis: results of a randomised controlled trial Gut ·Walter Reinisch, William J. Sandborn, Daniël W. Hommes, G. D’Haens, Stephen B. Hanauer, Stefanie Schreiber, Remo Panaccione, Richard N. Fedorak, M. B. Tighe, B Huang, Wendy Kampman, A. Lazar, Roopal Thakkar Hit paper breakdown →	2011	683
3	Levosimendan vs Dobutamine for Patients With Acute Decompensated Heart Failure JAMA ·Alexandre Mebazaa, Markku S. Nieminen, Milton Packer, Alain Cohen‐Solal, Franz X. Kleber, Stuart Pocock, Roopal Thakkar, Robert J. Padley, Pentti Põder, Matti Kivikko, for the SURVIVE Investigators Hit paper breakdown →	2007	645
4	Hyperaldosteronism Among Black and White Subjects With Resistant Hypertension Hypertension ·David A. Calhoun, Mari Nishizaka, Mohammad A. Zaman, Roopal Thakkar, Paula Weissmann Hit paper breakdown →	2002	548
5	Effect of Levosimendan on the Short-Term Clinical Course of Patients With Acutely Decompensated Heart Failure JACC Heart Failure ·Milton Packer, Wilson S. Colucci, Lloyd D. Fisher, Barry M. Massie, John R. Teerlink, James B. Young, Robert J. Padley, Roopal Thakkar, Leticia Delgado‐Herrera, Jeffrey E. Salon, Chris Garratt, Bidan Huang, Toni Sarapohja	2013	285
6	Adalimumab Induces Deep Remission in Patients With Crohn's Disease Clinical Gastroenterology and Hepatology ·Jean‐Frédéric Colombel, Paul Rutgeerts, William J. Sandborn, Mei Yang, Anne Camez, Paul F. Pollack, Roopal Thakkar, Anne Robinson, Naijun Chen, Parvez Mulani, Jingdong Chao	2013	191
7	Efficacy and safety of adalimumab in Japanese patients with moderately to severely active ulcerative colitis Journal of Gastroenterology ·Yasuo Suzuki, Satoshi Motoya, Hiroyuki Hanai, Takayuki Matsumoto, Toshifumi Hibi∥, Anne Robinson, Nael M. Mostafa, Jingdong Chao, Vipin Arora, Anne Camez, Roopal Thakkar, Mamoru Watanabe	2013	133
8	Increased Risk of Malignancy With Adalimumab Combination Therapy, Compared With Monotherapy, for Crohn's Disease Gastroenterology ·Mark T. Osterman, William J. Sandborn, Jean–Frédéric Colombel, Anne Robinson, Winnie Lau, Bidan Huang, Paul F. Pollack, Roopal Thakkar, James D. Lewis	2013	129
9	Four-Year Maintenance Treatment With Adalimumab in Patients with Moderately to Severely Active Ulcerative Colitis: Data from ULTRA 1, 2, and 3 The American Journal of Gastroenterology ·Jean–Frédéric Colombel, William J. Sandborn, Subrata Ghosh, Douglas C. Wolf, Remo Panaccione, Brian G. Feagan, Walter Reinisch, Anne Robinson, Andreas Lazar, Martina Kron, Bidan Huang, Martha Skup, Roopal Thakkar	2014	124
10	Levosimendan vs. Dobutamine: Outcomes for Acute Heart Failure Patients on β-Blockers in SURVIVE European Journal of Heart Failure ·Alexandre Mebazaa, Markku S. Nieminen, Gerasimos Filippatos, John G.F. Cleland, Jeffrey E. Salon, Roopal Thakkar, Robert J. Padley, Bidan Huang, Alain Cohen‐Solal	2009	117
11	One‐year maintenance outcomes among patients with moderately‐to‐severely active ulcerative colitis who responded to induction therapy with adalimumab: subgroup analyses from ULTRA 2 Alimentary Pharmacology & Therapeutics ·William J. Sandborn, J F Colombel, Geert D’Haens, Gert Van Assche, Douglas C. Wolf, Martina Kron, A. Lazar, Anne Robinson, Mei Yang, J. Chao, Roopal Thakkar	2012	108
12	52-Week Efficacy of Adalimumab in Patients with Moderately to Severely Active Ulcerative Colitis Who Failed Corticosteroids and/or Immunosuppressants Inflammatory Bowel Diseases ·Walter Reinisch, William J. Sandborn, Remo Panaccione, Bidan Huang, Paul F. Pollack, Andreas Lazar, Roopal Thakkar	2013	85
13	Adalimumab maintains remission of Crohn's disease after up to 4 years of treatment: data from CHARM and ADHERE Alimentary Pharmacology & Therapeutics ·Remo Panaccione, J F Colombel, William J. Sandborn, Geert D’Haens, Qian Zhou, P Pollack, Roopal Thakkar, Anne Robinson	2013	84
14	Pharmacokinetics and Exposure–Efficacy Relationship of Adalimumab in Pediatric Patients with Moderate to Severe Crohnʼs Disease Inflammatory Bowel Diseases ·Shringi Sharma, Doerthe Eckert, Jeffrey S. Hyams, Sven Mensing, Roopal Thakkar, Anne Robinson, Joel R. Rosh, Frank M. Ruemmele, Walid M. Awni	2015	82
15	Adalimumab Therapy Is Associated With Reduced Risk of Hospitalization in Patients With Ulcerative Colitis Gastroenterology ·Brian G. Feagan, William J. Sandborn, Andreas Lazar, Roopal Thakkar, Bidan Huang, Nattanan Reilly, Naijun Chen, Mei Yang, Martha Skup, Parvez Mulani, Jingdong Chao	2013	76
16	Adalimumab for the Treatment of Japanese Patients With Intestinal Behçet’s Disease Clinical Gastroenterology and Hepatology ·Satoshi Tanida, Nagamu Inoue, Kiyonori Kobayashi, Makoto Naganuma, Fumihito Hirai, Bunei Iizuka, Kenji Watanabe, Keiichi Mitsuyama, Takuya Inoue, Yoshiaki Ishigatsubo, Yasuo Suzuki, Masakazu Nagahori, Satoshi Motoya, Shirô Nakamura, Vipin Arora, Anne Robinson, Roopal Thakkar, Toshifumi Hibi∥	2014	71
17	Randomised clinical study: discrepancies between patient‐reported outcomes and endoscopic appearance in moderate to severe ulcerative colitis Alimentary Pharmacology & Therapeutics ·Bindia Jharap, William J. Sandborn, Walter Reinisch, Geert D’Haens, A. M. Robinson, W. Wang, B Huang, A. Lazar, Roopal Thakkar, Jean‐Frédéric Colombel	2015	59
18	Open : Lymphoma Risk and Overall Safety Profile of Adalimumab in Patients With Crohn's Disease With up to 6 Years of Follow-up in the PYRAMID Registry The American Journal of Gastroenterology ·Geert D’Haens, Walter Reinisch, Remo Panaccione, Jack Satsangi, Joel Petersson, Mareike Bereswill, Dilek Arikan, Eva Perotti, Anne Robinson, Jasmina Kalabic, Gabriela Alperovich, Roopal Thakkar, Edward V. Loftus	2018	55
19	Effects of ACE Inhibitors, Calcium Antagonists, and Other Blood Pressure lowering Drugs Current Hypertension Reports ·Roopal Thakkar, Suzanne Oparil	2001	49
20	Levosimendan vs Dobutamine for Patients With Acute Decompensated Heart Failure Alexandre Mebazaa, Markku S. Nieminen, Milton Packer, Alain Cohen‐Solal, Franz X. Kleber, Stuart Pocock, Roopal Thakkar, Robert J. Padley, Matti Kivikko	2007	45

About Roopal Thakkar

Roopal Thakkar is a scholar working on Genetics, Epidemiology, Surgery, Gastroenterology and Economics and Econometrics, having authored 142 papers that have together received 5.3k indexed citations. Recurring topics across this work include Inflammatory Bowel Disease (111 papers), Microscopic Colitis (88 papers), Health Systems, Economic Evaluations, Quality of Life (14 papers), Pharmaceutical studies and practices (13 papers), Celiac Disease Research and Management (12 papers), Autoimmune and Inflammatory Disorders (12 papers), Autoimmune and Inflammatory Disorders Research (11 papers) and Helicobacter pylori-related gastroenterology studies (11 papers). The work is most often cited by research in Genetics (3.1k citations), Epidemiology (2.7k citations), Gastroenterology (341 citations), Cardiology and Cardiovascular Medicine (1.3k citations) and Endocrinology, Diabetes and Metabolism (571 citations). Roopal Thakkar has collaborated with scholars based in United States, Germany and France. Frequent co-authors include William J. Sandborn, Andreas Lazar, Geert D’Haens, Walter Reinisch, Jean‐Frédéric Colombel, Anne Robinson, Douglas C. Wolf, Martina Kron, Gert Van Assche and Robert J. Padley. Their work appears in journals such as Gastroenterology, Inflammatory Bowel Diseases, The American Journal of Gastroenterology, Journal of Crohn s and Colitis and Gut.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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Roopal Thakkar

Roopal Thakkar's Hit Papers

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About Roopal Thakkar

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