About ICF

Ronaldo Iachan

Technical Director and Fellow, Senior Statistician
Ronaldo is a statistical design and analysis expert with nearly 40 years of experience in survey sampling and evaluation.

Ronaldo focuses primarily on health behavior, environmental, and social statistics. He has served on our Independent Review Board for nearly 20 years and served as a statistical editor for the Journal of the American Medical Association (JAMA) for 15 years. Ronaldo has extensive experience in statistical design and analysis, with more than 60 refereed articles published in statistical methods.

Ronaldo has designed several cycles of the Youth Risk Behavior Survey and the National Youth Tobacco Survey for the Centers for Disease Control and Prevention (CDC). He also developed statistical weighting and estimation procedures for these and many other multistage sample surveys. Ronaldo has analyzed data from the CDC’s Behavioral Risk Factor Surveillance System that have led to county and state-level estimates of sexual orientation and gender identity based on modules available only in some states. He was the statistical lead on a National Center for Health Statistics project focusing on non-response analysis and weighting for the National Health Interview Survey. Ronaldo is also the statistical lead on two HIV studies for the CDC, focusing on hard-to-reach populations in the U.S., as well as international studies also focused on rare and hard-to-reach populations. He is the lead statistician for a National Cancer Institute study involving probability and non-probability samples, data harmonization, weighting, data analysis, and a CDC study on COVID-19 estimation.

  • Ph.D., Statistics, University of California, Berkeley, 1980