2021 OMAS SURVEY

The 2021 OMAS is a critical tool for assessing health care access, health status, health care use, and select behavioral risks for the State of Ohio, emphasizing current and potential eligible Medicaid participants. The 2021 OMAS is the 9th iteration of the series which builds upon prior OMAS surveys to identify trend changes for Ohio's Medicaid, Medicaid-eligible, and non-Medicaid populations. With a sample size of almost 34,534 adult interviews, the 2021 survey is representative of all residential non-institutional Ohioans and includes data for approximately 6,121 child interviews, collected from proxy adults.

The 2021 OMAS is a 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 survey vendor is RTI International, a non-profit organization that provides research and technical services.

Survey Data

The 2021 OMAS public use dataset and associated documentation are available for download at https://grc.osu.edu/OMAS. This public use dataset contains all the data collected from the adult and child questionnaires except for select variables relating to the administration of data collection. Researchers interested in obtaining the restricted access research dataset with additional survey administration variables should submit a data-use inquiry to learn more about the process.

2021 Public Use File

• Stata
• R
• SAS

2021 County-Level Small Area Estimation Maps & Tables

• SAE Maps & Tables

To increase the precision of key 2021 outcomes from OMAS at the county level, a small area estimation (SAE) methodology was implemented for select variables, decided by the sponsoring agencies and the OMAS executive Committee.

2021 OMAS Questionnaire

• Paper Survey Instrument
• Telephone Survey Instrument
• Web Survey Instrument

2021 OMAS Analytical Codebook Files

• 2021 Codebook

Design and Methods

The 2021 OMAS used a combination of a cell phone random-digit-dialing (RDD) frame and an address-based sampling (ABS) frame. With the RDD frame, a combination of outbound calling using computer-assisted telephone interviewing (CATI) and text messaging, inviting respondents with cellular phones to complete the survey by web (through a computer-assisted web interviewing, or CAWI, module), was used. With the ABS frame, a combination of web interviewing and paper surveys (paper-and-pencil interviewing, or PAPI) was used. This 2021 iteration was the first OMAS iteration to occur during the COVID-19 pandemic and therefore the first iteration that needed to handle systematic changes in the way individuals communicate and their willingness to complete a survey. This new combination of modes was a direct response to these unique challenges.

The target population for the 2021 OMAS was the total noninstitutionalized adult and child populations residing in residential households in Ohio. The OMAS sampling plan was a probability-based design with known probabilities of selection at each stage of selection. The general sample design was a stratified simple random sample of persons residing in Ohio. Final weights for the survey were constructed separately for the RDD and ABS portions and blended. See the 2021 methodology report for full details.

2021 Methodology Report

• 2021 Methodology Report

Research and Reports

Below is a list of briefs, chartbooks, and presentations that address key findings from the 2021 OMAS. Please continue to check back regularly as we post these findings.