Statistics & Research Hero

Statistical Consulting

Experienced statisticians and analysts who speak your language

Whether it’s analyzing data for a study or designing a clinical trial, we can help.

We’ve got the data covered.

Whether it’s analyzing data for a study or designing a clinical trial, we can help.

We’ve got the data covered.

Clients with a wide variety of research and quality-improvement goals have sought us out for more than 30 years — and we still start every project by digging deep to understand that client’s own unique goals. Our statistics team is approachable and excels at providing rigorous, straightforward, and transparent analysis.

How We Work

Rigorous methods and transparent processes

We match the complexity of analysis to the project need.

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  • We make results accessible. We avoid overly complicated interpretations and excel at data visualizations.
  • We are committed to ethical research, both in our statistical analyses and with protection of human subjects. We have secure data storage and will accommodate IRB, HIPAA, FERPA, and other requirements.
  • We start every project by discussing research aims and clarifying roles and responsibilities. Clients get a cost estimate and detailed scope of work before we begin.
  • We’re small enough to be nimble and large enough to handle complex projects and data sets.

Experienced and approachable staff

Our expert staff can recommend the best approach to each project.

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  • We have coauthored dozens of manuscripts with clients in peer reviewed journals on topics like: mental health, cancer, classroom teaching strategies, opioid use, diabetes, tobacco cessation, and family medicine.
  • We demystify statistical analysis and interpret results for a variety of audiences.
  • We prioritize professional development for our staff, so we can stay abreast of trends and bring best practices to our clients.
  • Many clients have been with us for over 10 years because they value our commitment to reliability, consistency, and trustworthiness.

Collaboration with other PDA divisions

Statistical consulting clients have access to all of PDA's resources.

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  • Our evaluation team brings expertise in areas like data visualization, qualitative analysis, literature reviews, and strategic planning.
  • We developed our own mixed-mode survey management system and use innovative strategies to boost survey response rates and data quality.
  • Our developers build and maintain secure web-based applications to streamline data collection. We have collaborated on projects involving machine learning analysis and data processing web applications.

Our Services

We offer an expansive array of statistical consulting services to meet every client need.

Study design

  • Research question refinement
  • Analysis plans
  • Sample size and power calculations
  • Randomization schedules

Data collection

  • Survey tool creation and administration
  • Phone, web, and mail survey modes
  • Database development for chart reviews

Data cleaning

  • Descriptive statistics
  • Missing data and outlier identification
  • Deduplicating data
  • Data matching
  • Recoding for analysis

Quantitative Analysis

  • Advanced regression modeling
  • Sensitivity analysis
  • Weighted analyses
  • Geocoding and mapping
  • Questionnaire validation and data reduction
  • Analysis in SPSS, SAS, and R

Manuscripts, Abstracts, Presentations

  • Drafting statistical methods and results
  • Creating tables and figures
  • Statistical review of drafts
  • Journal reviewer critique assistance

Ready to get started?

Whether you need a little statistical consulting on a study or support from design through completion, we’re ready to partner with you. Some of our clients have been with us for over 10 years – because they rely on our skilled team for analyses they can use and results they can trust.

Contact Us

"PDA has assisted our Research Department with study design, statistical analysis, and manuscripts for over ten years, and consistently provides our physicians and researchers with thorough and timely results."

Berit Swanberg, Clinical Research Coordinator

Twin Cities Spine Center

Statistics & Research Team

Our dedicated and talented statistics and research team is united by a common desire to improve communities.

Becky Lien

Becky Lien

Director of Statistics and Research

Sara Richter

Sara Richter

Senior Statistician II

Sam Friedrichsen

Sam Friedrichsen

Statistician I

Lily Dunk

Lily Dunk

Assistant Analyst II


Featured Highlights

Contributing to education research through survey and statistical support

PDA supported geoscience education researchers by administering a survey to over 10,000 instructors and providing survey design and statistical support.

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Monitoring delivery and birth outcomes in rural areas

PDA analyzed medical chart review data for family medicine clinicians to assess delivery and birth outcomes in rural Minnesota.

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Assessing medication therapies with quantitative analysis

PDA conducted a quantitative analysis of clinical trial data to assess the efficacy of two medications when the first treatment failed.

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See More Highlights

Our Clients

Our statistics and research team partners with universities, medical institutions, and nonprofits. These are a few of our valued partners.

Twin Cities Spine Center Logo
Health Partners Logo
Gillette Children's Specialty Healthcare Logo
ACID Logo