Research Methodology and Biostatistics Core

Ambuj Kumar I-4940-2012

Ambuj Kumar, MD MPH

Director, College of Medicine Internal Medicine

Assoc Professor & Director, College of Medicine Office of Research

Associate Professor, Internal Medicine, Morsani College of Medicine

Contact Info Division of Evidence Based Medicine
3515 East Fletcher Avenue, MDC 27
Tampa FL 33612

Academic Email: akumar1@health.usf.edu

Academic Phone:(813) 396-9194

View My C.V.

Education

  • MPH, Maternal & Child Health, University of South Florida, 2001
  • MD, Medicine, Tver State Medical Institute, 1998

Recent Publications

  • Shiani A Lipka S Lai A Rodriguez AC Andrade CM Kumar A Brady P. Carbon dioxide versus room air insufflation during balloon-assisted enteroscopy: A systematic review with meta-analysis. Endosc Int Open. 5: E67-E75., 2017.
  • Elston JB, Prabhakaran S, Lleshi A, Castillo B, Sun W, Kumar A, Ma Z, Smith PD, Dayicioglu D. Complications and Recurrence in Implant-Sparing Oncologic Breast Surgery. Annals of plastic surgery. 78(6S Suppl 5) : S269-S274, 2017. http://www.ncbi.nlm.nih.gov/pubmed/28328633
  • Caire MT, Kumar A, Stravitz RT, Kemmer N. Preliver transplant red cell distribution width predicts postliver transplant mortality. Clinical transplantation. 31(3) , 2017. http://www.ncbi.nlm.nih.gov/pubmed/28054385
  • Reljic T, Kumar A, Klocksieben FA, Djulbegovic B. Treatment targeted at underlying disease versus palliative care in terminally ill patients: a systematic review. BMJ open. 7(1) : e014661, 2017. http://www.ncbi.nlm.nih.gov/pubmed/28062473
  • Davis-Yadley AH, Lipka S, Rodriguez AC, Nelson KK, Doraiswamy V, Rabbanifard R, Kumar A, Brady PG. The safety and efficacy of single balloon enteroscopy in the elderly. Therapeutic advances in gastroenterology. 9(2) : 169-79, 2016. http://www.ncbi.nlm.nih.gov/pubmed/26929779
  • Richter JE Jacobs J Kumar A. Response to Elias and Castell. Am J Gastroenterol. 111: 1362-3., 2016.
  • Kumar A, Miladinovic B, Guyatt GH, Schünemann HJ, Djulbegovic B. GRADE guidelines system is reproducible when instructions are clearly operationalized even among the guidelines panel members with limited experience with GRADE. Journal of clinical epidemiology. , 2016. http://www.ncbi.nlm.nih.gov/pubmed/26845745
  • Mhaskar R, Wao H, Miladinovic B, Kumar A, Djulbegovic B. The role of iron in the management of chemotherapy-induced anemia in cancer patients receiving erythropoiesis-stimulating agents. The Cochrane database of systematic reviews. 2: CD009624, 2016. http://www.ncbi.nlm.nih.gov/pubmed/26845108
  • Dayicioglu D, Tugertimur B, Munzenmaier K, Khan M, Smith P, Murr M, Kumar A, Khakpour N. Outcomes of Breast Reconstruction After Mastectomy Using Deep Inferior Epigastric Perforator Flap After Massive Weight Loss. Annals of plastic surgery. , 2016. http://www.ncbi.nlm.nih.gov/pubmed/26808755
  • Shen H, Rodriguez AC, Shiani A, Lipka S, Shahzad G, Kumar A, Mustacchia P. Association between caffeine consumption and nonalcoholic fatty liver disease: a systemic review and meta-analysis. Therapeutic advances in gastroenterology. 9(1) : 113-20, 2016. http://www.ncbi.nlm.nih.gov/pubmed/26770272
  • Shiani A, Nieves J, Lipka S, Patel B, Kumar A, Brady P. Degree of concordance between single balloon enteroscopy and capsule endoscopy for obscure gastrointestinal bleeding after an initial positive capsule endoscopy finding. Therapeutic advances in gastroenterology. 9(1) : 13-8, 2016. http://www.ncbi.nlm.nih.gov/pubmed/26770263
  • El-Asmar J, Reljic T, Ayala E, Hamadani M, Nishihori T, Kumar A, Kharfan-Dabaja MA. Efficacy of High-Dose Therapy and Autologous Hematopoietic Cell Transplantation in Peripheral T Cell Lymphomas as Front-Line Consolidation or in the Relapsed/Refractory Setting: A Systematic Review/Meta-Analysis. Biology of blood and marrow transplantation : journal of the American Society for Blood and Marrow Transplantation. 22(5) : 802-14, 2016. http://www.ncbi.nlm.nih.gov/pubmed/26713431
  • Andrade CM, Patel B, Gill J, Amodeo D, Kulkarni P, Goldsmith S, Bachman B, Geerken R, Klein M, Anderson W, Miladinovic B, Fernandez I, Kumar A, Richter J, Vidyarthi G. Safety of Gastrointestinal Endoscopy With Conscious Sedation in Patients With and Without Obstructive Sleep Apnea. Journal of clinical gastroenterology. 50(3) : 198-201, 2016. http://www.ncbi.nlm.nih.gov/pubmed/25768974
  • Lipka S, Kumar A, Richter JE. Impact of Diagnostic Delay and Other Risk Factors on Eosinophilic Esophagitis Phenotype and Esophageal Diameter. Journal of clinical gastroenterology. 50(2) : 134-40, 2016. http://www.ncbi.nlm.nih.gov/pubmed/25710524
  • Charan J Reljic T Kumar A. Bedaquiline versus placebo for management of multiple drug-resistant tuberculosis: A systematic review. Indian journal of pharmacology.. 48(2) : 186-91, 2016.
  • Lipka S Kumar A Miladinovic B Richter JE. Systematic review with network meta-analysis: comparative effectiveness of topical steroids vs. PPIs for the treatment of the spectrum of eosinophilic oesophagitis. Alimentary pharmacology & therapeutics.. 43(6) : 663-73, 2016.
  • Kosambiya JK Baria HG Parmar R Mhaskar R Emmanuel P Kumar A. Diagnostic accuracy of self-reported symptomatic assessment versus per speculum/per vaginal examination for the diagnosis of vaginal/cervical discharge and lower abdominal pain syndromes among female sex workers. Indian journal of sexually transmitted diseases. 37(1) : 12-6, 2016.
  • Patel R, Chae S, Kumar A, Richter JE. Sedation and Afternoon Placement of the 48-Hour Wireless Ambulatory pH Capsule Results in More Reflux on the First Day. Journal of clinical gastroenterology. , 2016. http://www.ncbi.nlm.nih.gov/pubmed/27548735
  • Caire MT Strauss AT Kumar A Brady P. Emerging Biomarkers for the Diagnosis and Monitoring of Inflammatory Bowel Diseases. Inflamm Bowel. 22: E46, 2016.
  • Charan J Reljic T Kumar A. Author Reply. Indian J Pharmacol. 48: 467., 2016.
  • Kharfan-Dabaja MA Kumar A Hamadani M Stilgenbauer S Ghia P Anasetti C Dreger P Montserrat E Perales MA Alyea EP Awan FT Ayala E Barrientos JC Brown JR Castro JE Furman RR Gribben J Hill BT Mohty M Moreno C O'Brien S Pavletic SZ Pinilla-Ibarz J Reddy NM Sorror M Bredeson C Carpenter P Savani BN. Clinical Practice Recommendations for Use of Allogeneic Hematopoietic Cell Transplantation in Chronic Lymphocytic Leukemia on Behalf of the Guidelines Committee of the American Society for Blood and Marrow Transplantation. Biol Blood Marrow Transplant. 22: 2117-2125., 2016.
  • Dayicioglu D, Trotta R, Agoris C, Kumar A. Duoderm®-Bra for Nipple-Sparing Mastectomy: A Novel Technique to Optimize Nipple Position and Prevent Complications. Annals of plastic surgery. , 2016. http://www.ncbi.nlm.nih.gov/pubmed/26918525
  • Mhaskar R, Pathak EB, Wieten S, Guterbock TM, Kumar A, Djulbegovic B. Those Responsible for Approving Research Studies Have Poor Knowledge of Research Study Design: a Knowledge Assessment of Institutional Review Board Members. Acta informatica medica : AIM : journal of the Society for Medical Informatics of Bosnia & Herzegovina : časopis Društva za medicinsku informatiku BiH. 23(4) : 196-201, 2015. http://www.ncbi.nlm.nih.gov/pubmed/26483590
  • Summaiya Mulla Ambuj Kumar Sangita Rajdev. Comparison of MIC with MBEC Assay for in Vitro Antimicrobial Susceptibility Testing in Biofilm Forming Clinical Bacterial Isolates. Advances in Microbiology. 6(2) : 73-78, 2015.
  • Lipka S, Rabbanifard R, Kumar A, Brady P. A single-center United States experience with bleeding Dieulafoy lesions of the small bowel: diagnosis and treatment with single-balloon enteroscopy. Endoscopy international open. 3(4) : E339-45, 2015. http://www.ncbi.nlm.nih.gov/pubmed/26356602
  • Tsalatsanis A, Hozo I, Kumar A, Djulbegovic B. Dual Processing Model for Medical Decision-Making: An Extension to Diagnostic Testing. PloS one. 10(8) : e0134800, 2015. http://www.ncbi.nlm.nih.gov/pubmed/26244571
  • Djulbegovic M, Beckstead J, Elqayam S, Reljic T, Kumar A, Paidas C, Djulbegovic B. Thinking Styles and Regret in Physicians. PloS one. 10(8) : e0134038, 2015. http://www.ncbi.nlm.nih.gov/pubmed/26241650
  • Rodriguez AC, Shiani A, Lipka S, Nelson KK, Davis-Yadley AH, Rabbanifard R, Kumar A, Brady PG. Capsule Studies Performed in a Tertiary Care Center Versus Community Referrals Prior to Single-Balloon Enteroscopy: Does It Matter? Digestive diseases and sciences. 60(12) : 3716-20, 2015. http://www.ncbi.nlm.nih.gov/pubmed/26224642
  • Charan J, Chaudhari M, Jackson R, Mhaskar R, Reljic T, Kumar A. Comparison of methodological quality of positive versus negative comparative studies published in Indian medical journals: a systematic review. BMJ open. 5(6) : e007853, 2015. http://www.ncbi.nlm.nih.gov/pubmed/26109118
  • Mahipal A, Denson AC, Djulbegovic B, Lush R, Kumar A, Juan TH, Schell MJ, Sullivan DM. Effect of Age on Clinical Outcomes in Phase 1 Trial Participants. Cancer control : journal of the Moffitt Cancer Center. 22(2) : 235-41, 2015. http://www.ncbi.nlm.nih.gov/pubmed/26068771
  • Kumar A, Lipka S, Richter JE. Reply: To PMID 25459556. Clinical gastroenterology and hepatology : the official clinical practice journal of the American Gastroenterological Association. 13(9) : 1701, 2015. http://www.ncbi.nlm.nih.gov/pubmed/25967748
  • Djulbegovic B, Kumar A, Kaufman RM, Tobian A, Guyatt GH. Quality of evidence is a key determinant for making a strong GRADE guidelines recommendation. Journal of clinical epidemiology. 68(7) : 727-32, 2015. http://www.ncbi.nlm.nih.gov/pubmed/25766057
  • Lipka S, Boyce HW, Kumar A, Richter JE. The changing faces of eosinophilic esophagitis: the impact of consensus guidelines at the University of South Florida. Digestive diseases and sciences. 60(6) : 1572-8, 2015. http://www.ncbi.nlm.nih.gov/pubmed/25618310
  • Gill JA, Goldsmith S, Kumar A. Evaluating bone health in inflammatory bowel disease--a single tertiary care Veterans Hospital experience. Indian journal of gastroenterology : official journal of the Indian Society of Gastroenterology. 34(3) : 268-9, 2015. http://www.ncbi.nlm.nih.gov/pubmed/25597302
  • Lipka S, Rabbanifard R, Kumar A, Brady P. Single versus double balloon enteroscopy for small bowel diagnostics: a systematic review and meta-analysis. Journal of clinical gastroenterology. 49(3) : 177-84, 2015. http://www.ncbi.nlm.nih.gov/pubmed/25564409
  • Lipka S, Kumar A, Richter JE. No evidence for efficacy of radiofrequency ablation for treatment of gastroesophageal reflux disease: a systematic review and meta-analysis. Clinical gastroenterology and hepatology : the official clinical practice journal of the American Gastroenterological Association. 13(6) : 1058-67.e1, 2015. http://www.ncbi.nlm.nih.gov/pubmed/25459556
  • Patel AK, Patel KK, Chickabasaviah YT, Shah SD, Patel DJ, Narayanappa G, Kumar A. Microsporidial polymyositis in human immunodeficiency virus-infected patients, a rare life-threatening opportunistic infection: clinical suspicion, diagnosis, and management in resource-limited settings. Muscle & nerve. 51(5) : 775-80, 2015. http://www.ncbi.nlm.nih.gov/pubmed/25388126
  • Kumar A, Mhaskar R, Grossman BJ, Kaufman RM, Tobian AA, Kleinman S, Gernsheimer T, Tinmouth AT, Djulbegovic B. Platelet transfusion: a systematic review of the clinical evidence. Transfusion. 55(5) : 1116-27; quiz 1115, 2015. http://www.ncbi.nlm.nih.gov/pubmed/25387589
  • Reljic T Kumar A Djulbegovic B Kharfan-Dabaja MA. High-dose therapy and autologous hematopoietic cell transplantation as front-line consolidation in chronic lymphocytic leukemia: a systematic review. Bone Marrow Transplant.. 50(8) : 1069-74, 2015.
  • Kumar A Lipka S Richter JE. Reply. Clinical gastroenterology and hepatology : the official clinical practice journal of the American Gastroenterological Association. 13(9) : 1701, 2015.
  • Kumar A. Tobacco use and psychosis: missing the risk of bias assessment and other methodological considerations. The lancet. Psychiatry. 2(10) : 865, 2015. http://www.ncbi.nlm.nih.gov/pubmed/26462213
  • Mhaskar RS, Reljic T, Wao H, Kumar A, Miladinovic B, Djulbegovic B. Treatment-related harms: what was planned and what was reported? National Cancer Institute's Co-operative group phase III randomized controlled trials: a systematic review. Journal of clinical epidemiology. 67(3) : 354-6, 2014. http://www.ncbi.nlm.nih.gov/pubmed/24055164
  • Huafeng Shen Seth Lipka Ambuj Kumar Paul Mustacchia. Association between nonalcoholic fatty liver disease and colorectal adenoma: a systemic review and meta-analysis. Journal of Gastrointestinal Oncology. 5(9) : 440-46, 2014.
  • Djulbegovic B, Elqayam S, Reljic T, Hozo I, Miladinovic B, Tsalatsanis A, Kumar A, Beckstead J, Taylor S, Cannon-Bowers J. How do physicians decide to treat: an empirical evaluation of the threshold model. BMC medical informatics and decision making. 14: 47, 2014. http://www.ncbi.nlm.nih.gov/pubmed/24903517
  • Abu-Dalle I, Reljic T, Nishihori T, Antar A, Bazarbachi A, Djulbegovic B, Kumar A, Kharfan-Dabaja MA. Extracorporeal photopheresis in steroid-refractory acute or chronic graft-versus-host disease: results of a systematic review of prospective studies. Biology of blood and marrow transplantation : journal of the American Society for Blood and Marrow Transplantation. 20(11) : 1677-86, 2014. http://www.ncbi.nlm.nih.gov/pubmed/24867779
  • Muhammad A, Lamendola O, Daas A, Kumar A, Vidyarthi G. Association between colonic diverticulosis and prevalence of colorectal polyps. International journal of colorectal disease. 29(8) : 947-51, 2014. http://www.ncbi.nlm.nih.gov/pubmed/24866344
  • Koskan A, Klasko L, Davis SN, Gwede CK, Wells KJ, Kumar A, Lopez N, Meade CD. Use and taxonomy of social media in cancer-related research: a systematic review. American journal of public health. 104(7) : e20-37, 2014. http://www.ncbi.nlm.nih.gov/pubmed/24832403
  • Djulbegovic B, Beckstead JW, Elqayam S, Reljic T, Hozo I, Kumar A, Cannon-Bowers J, Taylor S, Tsalatsanis A, Turner B, Paidas C. Evaluation of Physicians' Cognitive Styles. Medical decision making : an international journal of the Society for Medical Decision Making. 34(5) : 627-637, 2014. http://www.ncbi.nlm.nih.gov/pubmed/24722474
  • Seth Lipka, Ambuj Kumar, Joel E. Richter. No Evidence for Efficacy of Radiofrequency Ablation for Treatment of Gastroesophageal Reflux Disease: A Systematic Review and Meta-analysis Clinical Gastroenterology and Hepatology. : http://dx.doi.org/10.1016/j.cgh.2014.10.013, 2014.
  • Seth Lipka, Jonathan Keshishian, Ambuj Kumar, Joel Richter. Mo1844 Time-Dependent Association of Untreated Eosinophilic Esophagitis and the Risk of Esophageal Stricture in a U.S. Population (meeting abstract) Gastroenterology. 146(5) : S669–S670, 2014.
  • Seth Lipka, Jonathan Keshishian, Ambuj Kumar, Joel Richter. Mo1845 NSAID's, Aspirin, Alcohol, Smoking, and GERD – Is There an Effect on the Eosinophilic Esophagitis Phenotype? (meeting abstract) Gastroenterology. 146(5) : S670, 2014.
  • Wao H, Mhaskar R, Kumar A, Miladinovic B, Guterbock T, Hozo I, Djulbegovic B. Uncertainty about effects is a key factor influencing institutional review boards' approval of clinical studies Ann Epidemiol. 24(10) : 734-740, 2014.
  • Kharfan-Dabaja M, Mhaskar R, Reljic T, Pidala J, Perkins JB, Djulbegovic B, Kumar A. Mycophenolate mofetil versus methotrexate for prevention of graft-versus-host disease in people receiving allogeneic hematopoietic stem cell transplantation Cochrane Database of Systematic Reviews. 7: DOI: 10.1002/14651858.CD010280.pub2, 2014.
  • Gil-Herrera, Eleazar; Tsalatsanis, Athanasios; Kumar, Ambuj; Mhaskar, Rahul; Miladinovic, Branko; Yalcin, Ali; Djulbegovic, Benjamin. Identifying homogenous subgroups for individual patient meta-analysis based on Rough Set Theory (meeting abstract) Engineering in Medicine and Biology Society (EMBC), 2014 36th Annual International Conference of the IEEE. : 3434-3437, 2014.
  • Branko Miladinovic, Ambuj Kumar, Rahul Mhaskar, Benjamin Djulbegovic. Benchmarks for detecting ‘breakthroughs’ in clinical trials: empirical assessment of the probability of large treatment effects using kernel density estimation BMJ Open 2014. 4(10) : e005249 doi:10.1136/bmjopen-2014-005249, 2014.
  • Andrade, C.M., Patel, B., Gill, J., Amodeo, D., Kulkarni, P., Goldsmith, S., Klein, M., Miladinovic, B., Kumar, A., Vidyarthi, G. 505 Comparison of the Safety of Gastrointestinal Endoscopy With Conscious Sedation in the Veteran Population With and Without Obstructive Sleep Apnea (meeting abstract) Gastrointestinal Endoscopy. 79(5) : AB154, 2014.
  • Seth Lipka, Rashanak Rabbanifard, Ambuj Kumar, Patrick Brady. Sa1618 Meta-Analysis Comparing Single to Double Balloon Enteroscopy for Deep Enteroscopy (meeting abstract) Gastrointestinal Endoscopy. 79(5) : AB276, 2014.
  • Kimberly Kolkhorst, Adnan Muhammad, Kiran Joglekar, Ambuj Kumar, Yasser Saloum. Sa1498 Diagnostic Accuracy of CT Scan in Predicting Endoscopic GI Pathology (meeting abstract) Gastrointestinal Endoscopy. 79(5) : AB235, 2014.
  • Gil-Herrera E, Tsalatsanis A, Kumar A, Mhaskar R, Miladinovic B, Yalcin A, Djulbegovic B. Identifying homogenous subgroups for individual patient meta-analysis based on Rough Set Theory. Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference. 2014: 3434-7, 2014. http://www.ncbi.nlm.nih.gov/pubmed/25570729
  • Shen H, Lipka S, Kumar A, Mustacchia P. Association between nonalcoholic fatty liver disease and colorectal adenoma: a systemic review and meta-analysis. Journal of gastrointestinal oncology. 5(6) : 440-6, 2014. http://www.ncbi.nlm.nih.gov/pubmed/25436123
  • Woolery KT, Hoffman MS, Kraft J, Nicosia SV, Kumar A, Kruk PA. Urinary interleukin-1β levels among gynecological patients. Journal of ovarian research. 7: 104, 2014. http://www.ncbi.nlm.nih.gov/pubmed/25403235
  • Miladinovic B, Kumar A, Mhaskar R, Djulbegovic B. Benchmarks for detecting 'breakthroughs' in clinical trials: empirical assessment of the probability of large treatment effects using kernel density estimation. BMJ open. 4(10) : e005249, 2014. http://www.ncbi.nlm.nih.gov/pubmed/25335959
  • Mahony H, Tsalatsanis A, Kumar A, Djulbegovic B. Evolution of treatment regimens in multiple myeloma: a social network analysis. PloS one. 9(8) : e104555, 2014. http://www.ncbi.nlm.nih.gov/pubmed/25119186
  • Wao H, Mhaskar R, Kumar A, Miladinovic B, Guterbock T, Hozo I, Djulbegovic B. Uncertainty about effects is a key factor influencing institutional review boards' approval of clinical studies. Annals of epidemiology. 24(10) : 734-40, 2014. http://www.ncbi.nlm.nih.gov/pubmed/25108689
  • Kharfan-Dabaja M, Mhaskar R, Reljic T, Pidala J, Perkins JB, Djulbegovic B, Kumar A. Mycophenolate mofetil versus methotrexate for prevention of graft-versus-host disease in people receiving allogeneic hematopoietic stem cell transplantation. The Cochrane database of systematic reviews. 7: CD010280, 2014. http://www.ncbi.nlm.nih.gov/pubmed/25061777
  • Mhaskar RS, Wao H, Mahony H, Kumar A, Djulbegovic B. Concordance between decision analysis and matching systematic review of randomized controlled trials in assessment of treatment comparisons: a systematic review. BMC medical informatics and decision making. 14: 57, 2014. http://www.ncbi.nlm.nih.gov/pubmed/25023450
  • Reljic T, Mahony H, Djulbegovic B, Etchason J, Paxton H, Flores M, Kumar A. Value of repeat head computed tomography after traumatic brain injury: systematic review and meta-analysis. Journal of neurotrauma. 31(1) : 78-98, 2014. http://www.ncbi.nlm.nih.gov/pubmed/23914924
  • Kharfan-Dabaja MA, Hamadani M, Reljic T, Pyngolil R, Komrokji RS, Lancet JE, Fernandez HF, Djulbegovic B, Kumar A. Gemtuzumab ozogamicin for treatment of newly diagnosed acute myeloid leukaemia: a systematic review and meta-analysis. British journal of haematology. 163(3) : 315-25, 2013. http://www.ncbi.nlm.nih.gov/pubmed/24033280
  • Miladinovic, Branko, Ambuj Kumar, and Benjamin Djulbegovic. Kernel Density Estimation for Random-effects Meta-analysis International Journal of Mathematical Sciences in Medicine (IJMSM). 1(1) : 1-5, 2013.
  • Duong VH, Lin K, Reljic T, Kumar A, Al Ali NH, Lancet JE, List AF, Komrokji RS. Poor outcome of patients with myelodysplastic syndrome after azacitidine treatment failure. Clinical lymphoma, myeloma & leukemia. 13(6) : 711-5, 2013. http://www.ncbi.nlm.nih.gov/pubmed/24054159
  • Djulbegovic B, Kumar A, Glasziou P, Miladinovic B, Chalmers I. Medical research: Trial unpredictability yields predictable therapy gains. Nature. 500(7463) : 395-6, 2013. http://www.ncbi.nlm.nih.gov/pubmed/23969443
  • Muhammad A, Dhamija M, Vidyarthi G, Amodeo D, Boyd W, Miladinovic B, Kumar A. Comparative effectiveness of traditional chemoembolization with or without sorafenib for hepatocellular carcinoma. World journal of hepatology. 5(7) : 364-71, 2013. http://www.ncbi.nlm.nih.gov/pubmed/23898369
  • Mhaskar R, Alandikar V, Emmanuel P, Djulbegovic B, Patel S, Patel A, Naik E, Mohapatra S, Kumar A. Adherence to antiretroviral therapy in India: a systematic review and meta-analysis. Indian journal of community medicine : official publication of Indian Association of Preventive & Social Medicine. 38(2) : 74-82, 2013. http://www.ncbi.nlm.nih.gov/pubmed/23878418
  • Djulbegovic B, Kumar A, Miladinovic B, Reljic T, Galeb S, Mhaskar A, Mhaskar R, Hozo I, Tu D, Stanton HA, Booth CM, Meyer RM. Treatment success in cancer: industry compared to publicly sponsored randomized controlled trials. PloS one. 8(3) : e58711, 2013. http://www.ncbi.nlm.nih.gov/pubmed/23555593
  • Miladinovic B, Mhaskar R, Hozo I, Kumar A, Mahony H, Djulbegovic B. Optimal information size in trial sequential analysis of time-to-event outcomes reveals potentially inconclusive results because of the risk of random error. Journal of clinical epidemiology. 66(6) : 654-9, 2013. http://www.ncbi.nlm.nih.gov/pubmed/23403248
  • Wao H, Mhaskar R, Kumar A, Miladinovic B, Djulbegovic B. Survival of patients with non-small cell lung cancer without treatment: a systematic review and meta-analysis. Systematic reviews. 2: 10, 2013. http://www.ncbi.nlm.nih.gov/pubmed/23379753
  • Kharfan-Dabaja MA, Hamadani M, Reljic T, Nishihori T, Bensinger W, Djulbegovic B, Kumar A. Comparative efficacy of tandem autologous versus autologous followed by allogeneic hematopoietic cell transplantation in patients with newly diagnosed multiple myeloma: a systematic review and meta-analysis of randomized controlled trials. Journal of hematology & oncology. 6: 2, 2013. http://www.ncbi.nlm.nih.gov/pubmed/23289975
  • Miladinovic B, Mhaskar R, Kumar A, Kim S, Schonwetter R, Djulbegovic B. External validation of a web-based prognostic tool for predicting survival for patients in hospice care. Journal of palliative care. 29(3) : 140-6, 2013. http://www.ncbi.nlm.nih.gov/pubmed/24380212
  • El-Jurdi N, Reljic T, Kumar A, Pidala J, Bazarbachi A, Djulbegovic B, Kharfan-Dabaja MA. Efficacy of adoptive immunotherapy with donor lymphocyte infusion in relapsed lymphoid malignancies Immunotherapy. 5(5) : 457-66, 2013.
  • Reljic, Tea, Ambuj Kumar, Helen Mahoney, Branko Miladinovic, Mohamed A. Kharfan-Dabaja, and Rahul Mhaskar. Efficacy Of Novel Agents As Maintenance Therapy For Multiple Myeloma: A Direct and Network Meta-Analysis (meeting abstract) Blood. 122(21) : 1945-1945, 2013.
  • Muhammad, Adnan, Rafik Lababidi, Elaine Tan, Ambuj Kumar, and Yasser Saloum. Outcome and Predictors of Survival after Transjugular Intrahepatic Portosystemic Shunt (TIPS) in Patients with Cirrhosis of Liver and Portal Hypertension (meeting abstract) AMERICAN JOURNAL OF GASTROENTEROLOGY. 108: S128, 2013.
  • Lacevic, Jasmin, Tea Reljic, Najla El Jurdi, Mohamed A. Kharfan-Dabaja, Taiga Nishihori, Rami S. Komrokji, and Ambuj Kumar. Conservative Management Vs. Allogeneic Hematopoietic Cell Transplantation For Polycythemia Vera: A Systematic Review and Decision-Analysis (meeting abstract) Blood. 122(21) : 5372, 2013.
  • Kharfan-Dabaja M, Nishihori T, Reljic T, Hamadani M, Baz R, Ochoa-Bayona JL, Mhaskar R, Djulbegovic B, Kumar A. hree-drug versus two-drug induction therapy regimens for patients with transplant-eligible multiple myeloma (Protocol) Cochrane Database of Systematic Reviews. (6) : DOI: 10.1002/14651858.CD010602, 2013.
  • Miladinovic B, Kumar A, Hozo I, Mahony H, Djulbegovic B. Trial sequential analysis may be insufficient to draw firm conclusions regarding statistically significant treatment differences using observed intervention effects: a case study of meta-analyses of multiple myeloma trials. Contemporary clinical trials. 34(2) : 257-61, 2013. http://www.ncbi.nlm.nih.gov/pubmed/23274403
  • Mhaskar R, Redzepovic J, Wheatley K, Clark OA, Miladinovic B, Glasmacher A, Kumar A, Djulbegovic B. Bisphosphonates in multiple myeloma: a network meta-analysis. The Cochrane database of systematic reviews. 5: CD003188, 2012. http://www.ncbi.nlm.nih.gov/pubmed/22592688
  • Aslam S, Georgiev H, Mehta K, Kumar A. Matching research design to clinical research questions. Indian journal of sexually transmitted diseases. 33(1) : 49-53, 2012. http://www.ncbi.nlm.nih.gov/pubmed/22529457
  • Mhaskar R, Djulbegovic B, Magazin A, Soares HP, Kumar A. Published methodological quality of randomized controlled trials does not reflect the actual quality assessed in protocols. Journal of clinical epidemiology. 65(6) : 602-9, 2012. http://www.ncbi.nlm.nih.gov/pubmed/22424985
  • Kumar A, Mhaskar AR, Reljic T, Mhaskar RS, Kharfan-Dabaja MA, Anasetti C, Mohty M, Djulbegovic B. Antithymocyte globulin for acute-graft-versus-host-disease prophylaxis in patients undergoing allogeneic hematopoietic cell transplantation: a systematic review. Leukemia : official journal of the Leukemia Society of America, Leukemia Research Fund, U.K. 26(4) : 582-8, 2012. http://www.ncbi.nlm.nih.gov/pubmed/22182922
  • Quinn GP, Pal T, Murphy D, Vadaparampil ST, Kumar A. High-risk consumers' perceptions of preimplantation genetic diagnosis for hereditary cancers: a systematic review and meta-analysis. Genetics in medicine : official journal of the American College of Medical Genetics. 14(2) : 191-200, 2012. http://www.ncbi.nlm.nih.gov/pubmed/22261755
  • Miladinovic B, Kumar A, Mhaskar R, Kim S, Schonwetter R, Djulbegovic B. A flexible alternative to the Cox proportional hazards model for assessing the prognostic accuracy of hospice patient survival. PloS one. 7(10) : e47804, 2012. http://www.ncbi.nlm.nih.gov/pubmed/23082220
  • Djulbegovic B, Kumar A, Glasziou PP, Perera R, Reljic T, Dent L, Raftery J, Johansen M, Di Tanna GL, Miladinovic B, Soares HP, Vist GE, Chalmers I. New treatments compared to established treatments in randomized trials. The Cochrane database of systematic reviews. 10: MR000024, 2012. http://www.ncbi.nlm.nih.gov/pubmed/23076962
  • Gwendolyn P, Quinn Tuya Pal Devin Murphy Susan t, Vadaparampil Ambuj Kuma. High-Risk Consumers’ Perceptions of PGD for Hereditary Cancers: A systematic Review and Meta-Analysis Genetics in Medicine. 14(2) : 191-200, 2012.
  • Kristen J, Wells Charles Preuss Yashwant Pathak J, K, Kosambiya and Ambuj Kuma. Engaging the community in health research in India. Technology and Innovation. 13: 305-319, 2012.
  • MA Kharfan-Dabaja J Pidala A Kumar T Terasawa and B Djulbegovic. Comparing efficacy of reduced-toxicity allogeneic hematopoietic cell transplantation with conventional chemo-(immuno) therapy in patients with relapsed or refractory CLL: a Markov decision analysis Bone Marrow Transplant. 47(9) : 1164-70, 2012.
  • Wells KJ, Luque JS, Miladinovic B, Vargas N, Asvat Y, Roetzheim RG, Kumar A. Do community health worker interventions improve rates of screening mammography in the United States? A systematic review. Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology. 20(8) : 1580-98, 2011. http://www.ncbi.nlm.nih.gov/pubmed/21653645
  • Quinn GP, Pal T, Murphy D, Vadaparampil ST, Kumar A. High-risk consumers' perceptions of preimplantation genetic diagnosis for hereditary cancers: A systematic review and meta-analysis. Genetics in medicine : official journal of the American College of Medical Genetics. , 2011. http://www.ncbi.nlm.nih.gov/pubmed/21918462
  • Miladinovic B, Kumar A, Hozo I, Djulbegovic B. Instrumental variable meta-analysis of individual patient data: application to adjust for treatment non-compliance. BMC medical research methodology. 11: 55, 2011. http://www.ncbi.nlm.nih.gov/pubmed/21510899
  • Pidala J, Djulbegovic B, Anasetti C, Kharfan-Dabaja M, Kumar A. Allogeneic hematopoietic cell transplantation for adult acute lymphoblastic leukemia (ALL) in first complete remission. Cochrane database of systematic reviews (Online). (10) : CD008818, 2011. http://www.ncbi.nlm.nih.gov/pubmed/21975786
  • Lu B, Kumar A, Castellsague X, Giuliano AR. Efficacy and Safety of Prophylactic Vaccines against Cervical HPV Infection and Diseases among Women: A Systematic Review & Meta-Analysis. BMC infectious diseases. 11(1) : 13, 2011. http://www.ncbi.nlm.nih.gov/pubmed/21226933
  • Kumar A, Galeb S, Djulbegovic B. Treatment of patients with multiple myeloma: an overview of systematic reviews. Acta haematologica. 125(1-2) : 8-22, 2011. http://www.ncbi.nlm.nih.gov/pubmed/21150183
  • Kumar A, Hozo I, Wheatley K, Djulbegovic B. Thalidomide versus bortezomib based regimens as first-line therapy for patients with multiple myeloma: a systematic review. American journal of hematology. 86(1) : 18-24, 2011. http://www.ncbi.nlm.nih.gov/pubmed/21120867
  • Mhaskar R, Redzepovic J, Wheatley K, Clark OA, Miladinovic B, Glasmacher A, Kumar A, Djulbegovic B. Bisphosphonates in multiple myeloma. Cochrane database of systematic reviews (Online). (3) : CD003188, 2010. http://www.ncbi.nlm.nih.gov/pubmed/20238320
  • Ambuj Kumar and Benjamin Djulbegovi. Critical Appraisal Skills –Making Sense of Evidence Acta Informatica Medica. 18(2) : 109-113, 2010.
  • Kumar A, List AF, Hozo I, Komrokji R, Djulbegovic B. Decitabine versus 5-azacitidine for the treatment of myelodysplastic syndrome: adjusted indirect meta-analysis. Haematologica. 95(2) : 340-2; author reply 343-4, 2010. http://www.ncbi.nlm.nih.gov/pubmed/19850902
  • A, R, Mhaskar G, Quinn S, Vadaparampil B, Djulbegovic C, K, Gwede and A, Kuma. Timing of first-line cancer treatments – Early versus late – A systematic review of phase III randomized trials Cancer Treatment Reviews. 36(8) : 621-8, 2010.
  • Djulbegovic B, Kumar A, Magazin A, Schroen AT, Soares H, Hozo I, Clarke M, Sargent D, Schell MJ. Optimism bias leads to inconclusive results-an empirical study. Journal of clinical epidemiology. , 2010. http://www.ncbi.nlm.nih.gov/pubmed/21163620
  • Kumar A, Kharfan-Dabaja MA, Glasmacher A, Djulbegovic B. Tandem versus single autologous hematopoietic cell transplantation for the treatment of multiple myeloma: a systematic review and meta-analysis. Journal of the National Cancer Institute. 101(2) : 100-6, 2009. http://www.ncbi.nlm.nih.gov/pubmed/19141779
  • Mhaskar R, Kumar A, Behera M, Kharfan-Dabaja MA, Djulbegovic B. Role of high-dose chemotherapy and autologous hematopoietic cell transplantation in primary systemic amyloidosis: a systematic review. Biology of blood and marrow transplantation : journal of the American Society for Blood and Marrow Transplantation. 15(8) : 893-902, 2009. http://www.ncbi.nlm.nih.gov/pubmed/19589478
  • Kharfan-Dabaja MA, Mhaskar AR, Djulbegovic B, Cutler C, Mohty M, Kumar A. Efficacy of rituximab in the setting of steroid-refractory chronic graft-versus-host disease: a systematic review and meta-analysis. Biology of blood and marrow transplantation : journal of the American Society for Blood and Marrow Transplantation. 15(9) : 1005-13, 2009. http://www.ncbi.nlm.nih.gov/pubmed/19660713
  • Djulbegovic B, Kumar A. Multiple myeloma: detecting the effects of new treatments. Lancet. 371(9625) : 1642-4, 2008. http://www.ncbi.nlm.nih.gov/pubmed/18486726
  • Djulbegovic B, Kumar A, Soares HP, Hozo I, Bepler G, Clarke M, Bennett CL. Treatment success in cancer: new cancer treatment successes identified in phase 3 randomized controlled trials conducted by the National Cancer Institute-sponsored cooperative oncology groups, 1955 to 2006. Archives of internal medicine. 168(6) : 632-42, 2008. http://www.ncbi.nlm.nih.gov/pubmed/18362256
  • Pal T, Permuth-Wey J, Kumar A, Sellers TA. Systematic review and meta-analysis of ovarian cancers: estimation of microsatellite-high frequency and characterization of mismatch repair deficient tumor histology. Clinical cancer research : an official journal of the American Association for Cancer Research. 14(21) : 6847-54, 2008. http://www.ncbi.nlm.nih.gov/pubmed/18980979
  • Behera M, Kumar A, Soares HP, Sokol L, Djulbegovic B. Evidence-based medicine for rare diseases: implications for data interpretation and clinical trial design. Cancer control : journal of the Moffitt Cancer Center. 14(2) : 160-6, 2007. http://www.ncbi.nlm.nih.gov/pubmed/17387301
  • Kharfan-Dabaja MA, Kumar A, Behera M, Djulbegovic B. Systematic review of high dose chemotherapy and autologous haematopoietic stem cell transplantation for chronic lymphocytic leukaemia: what is the published evidence? British journal of haematology. 139(2) : 234-42, 2007. http://www.ncbi.nlm.nih.gov/pubmed/17897299
  • Soares HP, Kumar A, Djulbegovic B. Evidence profiles for breast cancer: benefit/harms data based on the totality of randomized evidence. Cancer treatment reviews. 33(1) : 87-9, 2007. http://www.ncbi.nlm.nih.gov/pubmed/17081695
  • Kumar A, Soares HP, Balducci L, Djulbegovic B. Treatment tolerance and efficacy in geriatric oncology: a systematic review of phase III randomized trials conducted by five National Cancer Institute-sponsored cooperative groups. Journal of clinical oncology : official journal of the American Society of Clinical Oncology. 25(10) : 1272-6, 2007. http://www.ncbi.nlm.nih.gov/pubmed/17401017
  • Kumar A, Soares HP. Salvage radiotherapy increases survival in people with residual disease after chemotherapy for advance diffuse large cell lymphoma. Cancer treatment reviews. 32(6) : 487-90, 2006. http://www.ncbi.nlm.nih.gov/pubmed/16725265
  • Djulbegovic B, Soares HP, Kumar A. What kind of evidence do patients and practitioners need: evidence profiles based on 5 key evidence-based principles to summarize data on benefits and harms. Cancer treatment reviews. 32(7) : 572-6, 2006. http://www.ncbi.nlm.nih.gov/pubmed/16914268
  • Soares HP, Kumar A, Djulbegovic B. Evidence profiles for lung cancer: benefit/harms data based on the totality of randomized evidence. Cancer treatment reviews. 32(8) : 652-5, 2006. http://www.ncbi.nlm.nih.gov/pubmed/17008011
  • Kumar A, Djulbegovic B. Myeloma (multiple). Clinical evidence. (15) : 1-29, 2006. http://www.ncbi.nlm.nih.gov/pubmed/16973003
  • Kumar A, Soares HP, Djulbegovic B. Evidence profiles for colo-rectal cancer: benefit/harms data based on the totality of randomized evidence. Cancer treatment reviews. 32(7) : 577-80, 2006. http://www.ncbi.nlm.nih.gov/pubmed/16919883
  • Kumar A, Soares H, Serdarevic F. Totality of evidence: one of the keys to better oncology management. The Journal of oncology management : the official journal of the American College of Oncology Administrators. 14(1) : 12-4, 2005. http://www.ncbi.nlm.nih.gov/pubmed/15773599
  • Soares HP, Kumar A, Daniels S, Swann S, Cantor A, Hozo I, Clark M, Serdarevic F, Gwede C, Trotti A, Djulbegovic B. Evaluation of new treatments in radiation oncology: are they better than standard treatments? JAMA : the journal of the American Medical Association. 293(8) : 970-8, 2005. http://www.ncbi.nlm.nih.gov/pubmed/15728168
  • Kumar A, Soares H, Wells R, Clarke M, Hozo I, Bleyer A, Reaman G, Chalmers I, Djulbegovic B. Are experimental treatments for cancer in children superior to established treatments? Observational study of randomised controlled trials by the Children's Oncology Group. BMJ (Clinical research ed.). 331(7528) : 1295, 2005. http://www.ncbi.nlm.nih.gov/pubmed/16299015
  • Soares HP, Daniels S, Kumar A, Clarke M, Scott C, Swann S, Djulbegovic B. Bad reporting does not mean bad methods for randomised trials: observational study of randomised controlled trials performed by the Radiation Therapy Oncology Group. BMJ (Clinical research ed.). 328(7430) : 22-4, 2004. http://www.ncbi.nlm.nih.gov/pubmed/14703540
  • Kumar A, Loughran T, Alsina M, Durie BG, Djulbegovic B. Management of multiple myeloma: a systematic review and critical appraisal of published studies. The lancet oncology. 4(5) : 293-304, 2003. http://www.ncbi.nlm.nih.gov/pubmed/12732167
  • Djulbegovic B, Seidenfeld J, Bonnell C, Kumar A. Nonmyeloablative allogeneic stem-cell transplantation for hematologic malignancies: a systematic review. Cancer control : journal of the Moffitt Cancer Center. 10(1) : 17-41, 2003. http://www.ncbi.nlm.nih.gov/pubmed/12598853
  • Kumar A, Djulbegovic B. Why evidence based oncology management. The Journal of oncology management : the official journal of the American College of Oncology Administrators. 11(6) : 13-6, 2002. http://www.ncbi.nlm.nih.gov/pubmed/12502287