REP Population Overview
The REP links medical records across several providers in Minnesota and Wisconsin to identify unique persons (i.e., a records-linkage system). In particularly, the REP indexes the medical records of virtually all persons who have resided in Olmsted County, Minnesota from 1 Jan 1966 to present. The REP includes 2,383,724 medical records linked to 656,575 persons who lived in Olmsted County at some time from 1 Jan 1966 through 31 Dec 2023.
Beginning in 2014, the REP also includes information for persons living in an expanded 27-County region in Southern Minnesota and Western Wisconsin. The enumeration for the additional counties (Olmsted County plus 26 other counties) is provided from 1 Jan 2010 to present. The expanded REP includes 2,945,027 medical records linked to 1,437,382 persons who lived in the 27-County region at some time from 1 Jan 2010 through 31 Dec 2023 (REP Census version 2023 released Sep 2024).
Data below are organized into two sections: 1) Information from the REP Census, and 2) Information from the US Decennial Censuses. Within each section, data are further organized into a) Olmsted County and b) the Expanded 27-County REP Region (including Olmsted County):
| REP Census Data (Updated Sep 2024 using REP Census version 2023) | |
| a. Olmsted County | |
| Population on 1 Jan for years 2000, 2010, and 2020 separate by sex, age (4 groups), and race | XLSX |
| Population on 1 Jul for years 1966-2023, by sex and age (single year) | XLSX |
| b. Expanded 27-County Region | |
| REP Census coverage by county, sex, and age from 2005-2023 (50 pages, Tables and Maps) | |
| 27-County population on 1 Jan for years 2010 and 2020, separate by county, sex, and age (4 groups) | XLSX |
| 27-County population on 1 Jan for year 2020, separate by county, sex, and race | XLSX |
| Expansion of the Rochester Epidemiology Project (Rocca, et al., Int J Epidemiol. 2018) | PubMed |
| US Census Data (Updated Aug 2023) | |
| a. Olmsted County | |
| Olmsted County compared to Upper Midwest and Total US (1970-2020 US Decennial Census Data) | |
| Olmsted County vs. State of Minnesota, US Census Bureau QuickFacts | Link |
| Generalizability of Epidemiological Findings and Public Health Decisions (St. Sauver, et al., 2012) | PubMed |
| b. Expanded 27-County Region | |
| US Census Population for the 27-County Region, years 2010-2022, separate by county and sex | XLSX |
| Expansion of the Rochester Epidemiology Project (Rocca, et al., Int J Epidemiol. 2018) | PubMed |
REP population coverage compared to US Census (27-county region on 1 Jul 2022)
