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Partials and Break-offs in the National Health Interview Survey, 2002 1

Research on nonresponse in surveys has largely focused on how nonrespondents differ from respondents, item nonresponse, and the use of incentives to increase response rates. Partially completed interviews and break-offs have not been studied indepth. This dimension of nonresponse, between a hard refusal and complete participation, is of particular importance to the National Health Interview Survey (NHIS). The NHIS is a nationally representative annual household survey of health, often lasting over an hour and often involving two or more respondents. Because of the modular nature of the NHIS, partials and break-offs often result in whole subject matter sections and supplements not being completed. This paper will explore reasons for partials and break-offs in the 2002 NHIS, using quantitative and qualitative data collected from NHIS interviewers. Exploring reasons for partials and break-offs in the NHIS will enhance the development of strategies for reducing nonresponse in similar surveys.