253278 Reflecting the Community: Demographic Variations in Landline and Cell-Only Households for a Statewide Telephone Survey

Tuesday, November 1, 2011: 8:35 AM

Sarah Walsh, MPH, CHES , Foundation for a Healthy Kentucky, Louisville, KY
Jennifer Chubinski, MS , The Health Foundation of Greater Cincinnati, Cincinnati, OH
Michelle Vargas , Institute for Policy Research, University of Cincinnati, Cincinnati, OH
Eric Rademacher, PhD , Institute for Policy Research, University of Cincinnati, Cincinnati, OH
As Americans increasingly abandon their landline telephones in favor of cell phones, researchers face new challenges in conducting telephone surveys. The 2010 National Health Interview Study found that 31.1% of households in the southern United States have no landline (from: Blumberg SJ and JV Luke, http://www.cdc.gov/nchs/nhis.htm). This paper reviews how the addition of surveys with the cell-only population can impact the results of traditional landline surveys, and considers the costs and benefits of adding this hard to reach, but growing, population of telephone users. The Kentucky Health Issues Poll (KHIP) is a random digit dialing telephone health opinion survey of more than 1500 adults that has been conducted annually since 2008. A sample of more than 200 cell-only households was included on the 2009 and 2010 KHIP. The demographic characteristics of landline-only samples have been deficient when compared to Census estimates for Kentucky in representation of both younger and non-white respondents. In both 2009 and 2010, as compared to the unweighted landline sample, the unweighted cell-only sample was significantly more likely to be non-white and to be less than 35 years of age. Combining landline-only and cell-only surveys resulted in improved sample coverage, but did this improved coverage impact results? For example, the cell sample permitted the inclusion of considerably more uninsured Kentuckians than would have otherwise been possible with a landline-only sample (2010: OR = 2.3).

Learning Areas:
Assessment of individual and community needs for health education
Conduct evaluation related to programs, research, and other areas of practice
Public health or related research

Learning Objectives:
Participants will be able to describe the demographic differences between random samples of cell-phone only households and households with a landline telephone in Kentucky Participants will be able to evaluate the benefits of including a cell-only sample on random digit dial telephone surveys.

Keywords: Survey, Methodology

Presenting author's disclosure statement:

Qualified on the content I am responsible for because: I am qualified to present because I coordinate data collection and dissemination efforts for the Foundation, including telephone surveys.
Any relevant financial relationships? No

I agree to comply with the American Public Health Association Conflict of Interest and Commercial Support Guidelines, and to disclose to the participants any off-label or experimental uses of a commercial product or service discussed in my presentation.