Welcome to TDRdata.com, a gateway to our integrated, online epidemiology databases and primary market research. TDR has published the Incidence and Prevalence Database (IPD) since 1989. Our epidemiology databases are designed to be the most comprehensive "first-look" at any disease, procedure, symptom, or health issue. Our full-service market research and forecasting group has provided customized market research services to the healthcare industry for over 20 years.