2015 OMAS Survey

2015 OMAS Survey

The 2015 Ohio Medicaid Assessment Survey (OMAS) is a critical resource for assessing health statuses, health care access and service utilization, and select behavioral risks for Ohioans, with an emphasis on current Medicaid members and adults who are potentially eligible to receive Medicaid insurance. The 2015 OMAS is the 6th iteration of the series and builds upon prior surveys to identify trend changes for Ohio's Medicaid, Medicaid-eligible, and non-Medicaid populations. It is a cross-sectional random probability survey of non-institutionalized Ohio adults aged 19 years and older and proxy interviews of children aged 18 years and younger. The 2015 survey had a sample size of 42,876 adult interviews and 10,122 child interviews (via proxy adults).

The 2015 OMAS is an Ohio Medicaid Technical Assistance and Policy Program (MedTAPP) project funded by the Ohio Department of Medicaid (ODM), the Ohio Department of Health (ODH), the Ohio Department of Mental Health and Addiction Services (OhioMHAS), and The Ohio State University (OSU). The OMAS survey vendor is RTI International, a non-profit organization that provides research and technical services. 

Archived Content Notice

The resources on this page are for historical records, research, and reference and are no longer maintained, altered, and/or updated as of April 23, 2026. Some content may not meet accessibility standards. To request content in an accessible format, contact GRCAccess@osumc.edu

Survey Data

Three datasets and associated documentation are available:

  • The public use file (PUF) contains data collected from the adult and child questionnaires.
  • The public analytics file (PAF) contains analysis-ready variables constructed from the PUF. These variables account for skip patterns, allow for easy calculations, and provide clearly labelled categorical variables. Details on how each variable is constructed can be found in the associated reference book.
  • The research use file (RUF) contains data included in the PUF, in addition to a zip-code level identifier. It also contains select variables relating to the administration of data collection and some frame variables.

To download the OMAS PUF or PAF, please use our PUF/PAF request form. Researchers interested in obtaining the RUF can submit a request for access which will be reviewed by GRC and the Ohio Department of Medicaid.

Please note that the 2015 PUF was updated in April 2023 to address updates to the way that derived race-ethnicity variables were coded and how health insurance variables were imputed to better align with updates that were made as part of the 2021 OMAS data. Survey weights were also updated as part of the revision. If you utilized the earlier version of the file, your estimates may be slightly different, and we encourage you to re-download the file for analysis. 

2015 Datasets Documentation

2015 Questionnaire

Design and Methods

The 2015 OMAS was structured as a stratified random digit dial dual-frame (cell phone and landline phone) complex designed (multiple strata) telephone survey that enables analyses at the state, Medicaid Managed Care Plan region, and select county levels. Survey weighting was performed in stages at the county, regional, state, oversample, and cell phone levels to provide robust analyses with inferential certainty. It excluded institutional settings such as university dorms, incarceration facilities, assisted living facilities, hospitals, and businesses. The selection method ensured a reliable sample of residents. Additionally, to address cultural/ethnic/racial variations, African-Americans were oversampled and Hispanics and Asians were set into separate sample lists via surname techniques. Download the complete methods report to learn more about the design and data collection processes.

Research and Reports

Below is a list of briefs, chartbooks, and presentations that address key findings from the 2015 OMAS. The analyses completed were exploratory and are meant to be descriptive in nature. Because they were not driven by specific research questions, no statistical testing was conducted, and the precision of provided estimates is assessed using confidence intervals. The provided confidence intervals should not be used to conduct “ad-hoc” testing to compare differences between groups. For any research using data from the 2015 OMAS, a research plan should be specified that includes primary hypotheses and corresponding statistical analysis strategies.
 

Chartbook

Briefs

PowerPoint

Ohio Medicaid Assessment Survey Sponsored Research Conference - June 29, 2016

On behalf of the Ohio Department of Medicaid and the Ohio Department of Health, please download conference materials for key findings from the 2015 Ohio Medicaid Assessment Survey.

Agenda for the June 29, 2016 OMAS Sponsored Research Conference

Read the OMAS Sponsored Research Conference Agenda (PDF)

Presentations

Chartbooks

Briefs

Presentation Recording 

Each presentation is separated by agenda item and title.

View a List of the Presentations

Related Links