Next Workshop: August 10-11, 2024

  • Registration fee:


    - Trainee:                               Early Bird (ends July 26, 2024) : $560             Regular: $599     

    - Non-trainees:                     Early Bird (ends July 26, 2024) : $675             Regular: $725 

    - Refresher course:              Early Bird (ends July 26, 2024) : $150             Regular: $200   



- Longitudinal analysis with NIS: TRENDWT files ,ICD-9/10 codes adjustments, how  to control for temporal changes across the years, how to account for inflation over the years, how to generate trend p values, how to compare two trends over the years (interaction term use in regression analysis)

- How to use multiple imputation to account for missing data
- How to use propensity matching to account for confounders
- How to do survival analysis, Kaplan-Myers curves and cox regression analysis
- How to cheat STATA and shorten the databases to make calculations faster without losing accuracy
- How to change hospital charges to hospital costs, calculate hospital volumes and find the most common diagnoses in a study population
- How to append databases: pointers and pitfalls
- How to use the hospital readmission database (NRD): what are the limitations and assumptions in the database, how to write the do loops to calculate readmission, what are the different definitions of readmissions, how to calculate 30-day mortality, and how to calculate time to readmission for time-to-event analysis. 

- All the above commands will be in do files that are ready to use. In addition, we will go over the complete do file of a research project based on NRD and that has been recently published in Gastroenterology, the number one GI journal in the USA by impact factor: 

Abougergi MS, Peluso H, Saltzman JR. Thirty-Day Readmission Among Patients With Non-Variceal Upper Gastrointestinal Hemorrhage and Effects on Outcomes. Gastroenterology 2018 ;155:38-46

  • Participants should bring: a laptop computer for the hands on sessions

                                                             - STATA access is provided for Windows based and Mac computers

                             for the workshop schedule

  • Curriculum: The following topics will be covered during the workshop. A STATA do file is provided for every topic to make execution be as easy as a copy and paste maneuver:

During this workshop, advanced topics in statistics and NIS and NRD are presented. Therefore,  the Online Catalyst Workshop/Catalyst Large Database Analysis Research Workshop is a pre-requisite for registeration

  • Workshop reviews:  


  • The workshop registration fee includes the following:  

                      - Access to all the lectures and hands-on sessions for 2 days

                      - 16 AMA category 1 CME credits

                      - The complete STATA program (do file) of an already published article using NRD

                      - Free access to STATA for the duration of the workshop

                      - All lectures, hands-on sessions handouts and extra material  as well as ready to use STATA do files for                          the commands used to download and keep

                      - Complimentary access to ThinkBig, the private online large database analysis research community

"The Advanced Catalyst workshop is by far the best course that I have come across that effectively teaches how to use HCUP databases. This course combines material in two days that is not even taught in graduate school courses. Marc simplifies complex statistical concepts and makes them easy to digest, and hands you the code needed to conduct your analysis (which normally takes a long time to compile on your own). This is a must-attend workshop for anyone who wants to delve into HCUP database research." Hala Nas, MD - Cleveland Clinic, Rochester, MN 



  • Database:  National Inpatient Sample (NIS) and National Readmission Database  (NRD)

                                           - Largest inpatient and readmission databases in the United States, respectively

                                           - Free access to representative databases for the duration of the workshop


  • Date:  Saturday August 10 and Sunday August 11, 2024 from 7:30 AM to 5:30 PM EST

  • Software:  STATA

                                           - Free access to STATA for the duration of the workshop


" The Advanced Catalyst Workshop definitely changed my life! You told us during the workshop that it will bring so much joy and excitement. It is very true!" Yichen Wang, MD - Trinity Health of New England 


                             to register

                             to register

                             to register

" Thank You Marc for the excellent Advanced Catalyst workshop last weekend. I learnt a lot of things and the course helped me understand lots of concepts. " Karthik Reddy, MD - University of Missouri Medical Center

" I  can't thank you enough for what you have taught us during the advanced workshop. You are doing incredible work by transferring these skills to future researchers. Please keep up this excellent work!" Moddasir Ashraf, MD - UnityPoint Health System

" The Advanced Catalyst workshop was a game changer for me! Thanks to what I learned from the workshop I have gotten oral presentations and papers in high impact journals.  I will always be indebted to you and the Advanced Catalyst workshop !!! " Monil Majmundar, MD - New York Medical College, Metropolitan Medical Center

  • Sites:               


                                       - Fairfax, VA: Virginia Conference Center

                                       - Chicago, IL: John H. Stroger, Jr. Hospital of Cook County


" Thank you for the wonderful workshop. The knowledge I acquired is of tremendous help for future projects!" Aditi Sharma, MD - Wayne State University, Detroit Medical Center

" The advanced catalyst course was an amazing and extremely rare opportunity. I really enjoyed learning about advanced statistics and analysis using NIS and NRD. The course was an expert condensation of over 10 years of hard work and it cannot be learned from any textbook. I am extremely grateful to Marc for sharing his wealth of knowledge and making research using NIS and NRD more accessible." Yaser Khalid, MD - The wright Center 


"Thank you for the amazing and intensive advanced catalyst workshop. Not only has the session helped me learn advanced analytical skills, it also helped me network with a great group of people who I can collaborate for research projects. I am so happy I was able to attend the workshop." Don Mathew, MD - The University of Pittsburgh Medical Center

" Thank you for the great workshop. I learned a lot. Everything was explained from scratch and in details. It is worth the effort and commitment. I highly recommend it." Zahra Shahin - Georgia Southern University  

​All workshop sites are interconnected  and will run simultaneously on August 10-11, 2024

" Thank you so much for the Advanced Catalyst Workshop. It was indeed a life-changing experience". Abdul Rahman Akkawi, MD - Kansas Unverrsity School of  Medicine

" It was a pleasure to attend the Advanced Catalyst Workshop. Thank you so much for the great teaching and material provided".  Federico Viganego, MD - Nazareth Cardiology, Trinity Health Mid-Atlantic

" I want to thank you for all your teaching that you provided in the Advanced Catalyst Workshop. With that knowledge, I could produce and publish more than 15 abstracts within my first year of the internal medicine residency. I am truly grateful for everything. "

Rohan Gajjar, MBBS - John H. Stroger, Jr. Hospital of Cook County, Research Collaborator, Mayo Clinic, Rochester, MN


" Attending the advanced catalyst workshop was an amazing experience. It provided me with even more advanced tools to produce more complex and elevated research studies and learn how to use the NRD which expanded the realm of possible research ideas I could do. If you attend the online catalyst workshop, you know Dr. Georgi will provide exceptional teaching and truely give you the tools to elevate your research career to the next level. "

Jose Luis Lopez, MD - Cardiovascular Disease Fellow at University of Miami Miller School of Medicine


  • COVID-19 Precautions: all participants will be encouraged to wear a mask

" Thank You  for the amazing Advanced Catalyst workshop last weekend. I learnt a lot " Yasir Saeed, MD - Mount Sinai Beth Israel

" Thank you for an amazing Advanced Catalyst Workshop!"  Irfan Shafi, MD - Detroit Medical Center


If you would like to host a site for the Advanced Catalyst Workshop on August 10-11, 2024, please email us on All what is needed is a Zoom (or Webex/teams) equipped conference room


"Dear Marc,

I cannot express in words how awesome the advanced workshops was. I am so glad that I attended it. You did a great job of simplifying and explaining everything so well. I think it is a great achievement that you were able to get across so much in so little time, and also keeping us involved in the process at all times. I have highly recommended it to several colleagues and they will be attending the upcoming workshops." Akshay Goel, MD - University of Arkansas Medical Center. 


" I took the Advanced Workshop and loved every moment. Marc is an excellent and very patient educator. He breaks down complex concepts into digestible bits, making this course unique and fun. I learned not only about large database research but also the general research principles and ethics applicable to many aspects of academia. I am quite inspired by Marc's teaching and his research. I look forward to applying the concepts to my own research questions in the coming weeks. Thank you Marc.  "

Amteshwar Singh MD M.Ed. FACP FHM - Director of Education, Division of Hospital Medicine, Johns Hopkins Bayview Medical Center


" I wanted to take the opportunity to say thank you for putting together the workshop. It was a great learning experience. The material was very practical and I really appreciate you sharing those tricks from your years of experience in large database research. What I have learned during this workshop will certainly help me take research to a new level. It is truly a highly recommended course for people interested in large database research "

Yong Zhan, MD  -  Co-Director, Aortic Disease Program, Division of Cardiothoracic Surgery, Tufts University School of Medicine


" I want to express my gratitude for the advanced course. I learned a tremendous amount.  The weekend in Chicago was filled with fun and enlightenment. I had the opportunity to meet many exceptional individuals and gained valuable insights during the course. Your dedication to research is truly admirable, and I appreciate the effort you put into it. Thank you once again for the invaluable experience."

" Barath Prashanth Sivasubramanian, MBBS - University of Texas Health Science Center at San Antonio 

" The workshop was amazing and has helped me gain skills using STATA to analyze large databases including NIS and NRD. The hands-on sessions in particular were very helpful. I highly recommend the workshop to everyone interested in research using large database analysis."

Govinda Adhikari, MD- University of Arizona College of Medicine Tucson 

" The online component of the Catalyst workshop provides an excellent foundational understanding of NIS and coding principles. Marc elevates the learning experience in the Advanced workshop, guiding participants to an advanced level in Stata, coding techniques, and paper production. Before this workshop, I faced significant challenges with NIS and coding. Despite trying other courses, none compared to the organized, comprehensible material offered by Catalyst. It’s evident that Marc is not just teaching; he truly understands the subject matter deeply. I highly recommend the Catalyst course especially the advanced workshop."

Zaid Abood , MD- Aurora Saint Lukes Medical Center.

" This was my second time participating, and I felt much more comfortable digesting the content than I had the first time. Even though it was online, the technology made it as comfy as if I were in person. It was great to learn the insights from Dr. Goergi's analytics and experiences that he has thought about for a long time. It was inspiring to see his passion, especially when he answered all of our questions."

Youjin Oh , MD- John H. Stroger, Jr. Hospital of Cook County

" I was truely inspired by the workshop. I am empowered to start research projects without limitations on the topics I can explore. The workshop also provides comprehensive review of important statisitcal concepts in the medical field. Dr Georgi is a great teacher, as he can explain complicated concepts in a simple way! Thank you for being a catalyst, Dr Georgi! "

Kim Abbegail Aldecoa, MD - Trinity Health Oakland/Wayne State University Hospital

" Thanks to the Online Catalyst Workshop and the Advanced Catalyst Workshop that improved my CV, I matched to Hematology/Oncology fellowship in a top university program despite being on a H-1 visa."

Vaishali Deenadayalan, MD  - John H. Stroger, Jr. Hospital of Cook County