Services

Parameter is a statistical consulting firm located in Ann Arbor, Michigan. We provide statistical and data management services to researchers, businesses and individuals. Parameter provides research services from study design to manuscript writing, and everything (small and large) in between.

Our purpose is to help our clients find meaning in their data. We bring to the table technical expertise with statistical software packages and quantitative methods, as well as business, industry and publication experience.

Whether you have an existing research project, or you are embarking on a new data effort, Parameter has the experience to help you. To discuss your particular project needs, please get in touch.

Workshops

Parameter offers customized workshops for individuals and teams, in-person or by webinar. We strive to offer individualized, hands-on workshop solutions for our clients that are relevant to their day-to-day work and professional development needs. Our workshop topic areas include statistical software use, statistical methodology, and data analysis. Please contact us to discuss your workshop requirements.

Past workshops

Introduction to Stata
Data Management using SAS, SPSS and Stata
Introduction to SAS
Intermediate Stata
Data Management using Stata
Introductory Statistics using Stata
Stata Programming
Stata Graphing
Analysis of Clustered and Longitudinal Data using Stata
Analysis Planning and Execution
Classification and Regression Trees using JMP

Data

Data privacy and security are real concerns that we work to resolve up front with every client. Some types of data we have worked with in the past include:

Proprietary

Surveys
Clinical trials
Electronic Medical Records (EMR)

Public

Medicare claims Healthcare Cost and Utilization Project standardized medical claims (HCUP)
Electronic Medical Record (EMR)
National Health and Nutrition Examination Survey (NHANES)
United States Renal Data System (USRDS)
Health and Retirement Survey (HRS)
United States Census
Hospital Compare
Leapfrog Group

About

Heidi is a Master’s level statistician (University of Michigan, ‘07) with more than 20 years of consulting experience in IT and statistics. She has a breadth of client experience across industries including health insurance, health care, pharmaceuticals, government, retail, air transportation, and academia. Her professional and academic experience have resulted in many publications in peer-reviewed journals covering General Medicine, Geriatrics, Epidemiology, Nephrology, Surgery, and Social Science. Heidi’s work spans a diverse set of projects involving medical record data, claims data, complex sample survey data, and public and proprietary use data. Her methodological interests include risk adjustment methods and models for clustered and longitudinal data. She has extensive data management and programming experience in Stata and also uses SAS and R. Heidi has given client workshops on data analysis planning, data management, statistical methods and programming. She has also served as an adjunct lecturer of statistics at the University of Michigan School of Public Health. Heidi has presented her work at methods conferences including the American Statistical Association’s (ASA) International Conference for Health Policy Statistics and the Conference on Statistical Practice.

LinkedIn

Selected Publications

1. Röth A, Fryzek J, Jiang X, Reichert H, Patel P, Su J, Morales Arias J, Broome CM. 2021. Complement-mediated hemolysis persists year-round in patients with cold agglutinin disease. Transfusion [online] 1–9; doi: 10.1111/trf.16745. Print: Transfusion 2022;62:51–59.

2. Hackshaw A, Cohen SS, Reichert H, Kansal AR, Chung KC, Ofman JJ. 2021. Estimating the population health impact of a multi-cancer early detection genomic blood test to complement existing screening in the US and UK. Brit J Cancer, open access: https://www.nature.com/articles/s41416-021-01498-4.pdf. 

3. Proctor DM, Bhat V, Suh M, Reichert H, Jiang X, Thompson CM. 2021. Inhalation cancer risk assessment for environmental exposure to hexavalent chromium: Comparison of margin-of-exposure and linear extrapolation approaches. Regul Toxicol Pharmacol 124:104969, https://doi.org/10.1016/j.yrtph.2021.104969. 

4. Dake MD, Fanelli F, Lottes AE, O’Leary EE, Reichert H, Jiang X, Fu W, Iida O, Zen K, Schermerhorn M, Zeller T, Ansel GM. 2020. Prediction model for freedom from TLR from a multi-study analysis of long-term results with the Zilver PTX drug-eluting peripheral stent. Cardiovasc Intervent Radiol, open access, https://link.springer.com/article/10.1007/s00270-020-02648-6.

5. Gage SM, Reichert H. 2020. Determining the incidence of needle-related complications in hemodialysis access: We need a better system. J Vascular Access https://doi.org/10.1177/1129729820946917.

6. Czerkies LM, Finn KL, Kineman BD, Reichert H, Cohen SS, Carvalho RS. 2019. Use of a partially hydrolyzed 100% whey-based infant formula with Lactobacillus reuteri in infants with caregiver-perceived intolerance. J Pedat Health Nutr, open access: https://www.openaccesspub.org/jphn/article/1208.

7. Nordyke RJ, Reichert H, Bylsma LC, Jackson JJ, Gage SM, Fryzek J, Roy-Chaudhury P, Lithgow T. 2019. Costs attributable to arteriovenous fistula and arteriovenous graft placements in hemodialysis patients with Medicare coverage. Am J Nephrol [Online first, abstract only]: doi: 10.1159/000502507, https://www.karger.com/Article/Abstract/502507#. 

8. Storm HM, Shepard J, Czerkies LM, Kineman B, Cohen SS, Reichert H, Carvalho R. 2019. 2’-Fucosyllactose is well tolerated in a 100% whey, partially hydrolyzed infant formula with Bifidobacterium lactis: A randomized controlled trial. Global Pediat Health 6:1–10. DOI: 10.1177/2333794X19833995.

9. Bylsma L, Reichert H, et al. “Clinical Outcomes of Arteriovenous Access in Incident Hemodialysis Patients with Medicare coverage, 2012-2014.” American Journal of Nephrology. DOI: 10.1159/000495355

10. Laura A. Czerkies, Brian D. Kineman, Sarah S. Cohen, Heidi Reichert, and Ryan S. Carvalho. “A Pooled Analysis of Growth and Tolerance of Infants Exclusively Fed Partially Hydrolyzed Whey or Intact Protein-Based Infant Formulas.” International Journal of Pediatrics, vol. 2018, Article ID 4969576.
11. Bylsma L, Gage S, Reichert H, Dahl S, Lawson J. “Arteriovenous Fistulas for Hemodialysis: A Systematic Review and Meta-analysis of Efficacy and Safety Outcomes.” European Journal of Vascular and Endovascular Surgery; 2017; 54:513-522.
12. Banaszak-Holl, J., Reichert, H., Todd Greene, M., Mody, L., Wald, H. L., Crnich, C., McNamara, S. E. and Meddings, J. “Do Safety Culture Scores in Nursing Homes Depend on Job Role and Ownership? Results from a National Survey.” J Am Geriatr Society; 2017 August; doi:10.1111/jgs.15030.
13. Mullins M, Jiang X, Bylsma L, Fryzek J, Reichert H, Chen E, Kummar S, Rosenthal A. “Cold agglutinin disease burden: a longitudinal analysis of anemia, medications, transfusions and health care utilization.” Blood Advances 2017 May;1(13):839-848.
14. Meddings J, Reichert H, Smith SN, Iwashyna TJ, Hofer, TP, McMahon LF, Jr. “The impact of disability and social determinants of health on condition-specific readmissions beyond standard Medicare risk-adjustments: a cohort study.” Journal of General Internal Medicine 2017 January; 32(1): 71-80.
15. Meddings J, Reichert H, Rogers MAM, Hofer TP, McMahon LF, Grazier KL. “Under pressure: financial impact of the Hospital-Acquired Conditions Initiative. A statewide analysis of pressure ulcer development and payment.” Journal of the American Geriatrics Society 2015 Jul;63(7):1407-12.
16. Meddings J, Reichert H, Hofer T, McMahon L. “Hospital report cards for hospital-acquired pressure ulcers: how good are the grades?” Annals of Internal Medicine, October 2013;159(8):505-513.
17. Laura H. Lind, Michael F. Schober, Frederick G. Conrad, Heidi Reichert. “Why do survey respondents disclose more when computers ask the questions?” Public Opinion Quarterly 2013; doi: 10.1093/poq/nft038.
18. Volk M, Reichert H, Lok A, Hayward R. “Variation in organ Quality between Liver Transplant Centers.” American Journal of Transplantation, 2011;11(5):958-964.

Say Hello

Send us email if you are interested in discussing a project, hosting a workshop or simply want to say hi.