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Activity Number:
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433
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Type:
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Contributed
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Date/Time:
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Thursday, August 12, 2004 : 10:30 AM to 12:20 PM
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Sponsor:
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Section on Survey Research Methods
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| Abstract - #301820 |
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Title:
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An Assessment of Interrupted Telephone Service Adjustment
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Author(s):
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Mansour Fahimi*+ and Lily Trofimovich and Ali Mokdad and Michelle Town and William Garvin and Lina Balluz and Henry Wells and Paul Levy
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Companies:
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RTI International and RTI International and Centers for Disease Control and Prevention and Centers for Disease Control and Prevention and Centers for Disease Control and Prevention and Centers for Disease Control and Prevention and RTI International and RTI International
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Address:
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6110 Executive Blvd., Suite 420, Rockville, MD, 20852,
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Keywords:
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telephone sampling ; interrupted service ; post-stratification ; behavioral risk factors
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Abstract:
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The exclusion of households without telephone is a source of systematic bias in telephone surveys. While lack of telephone service among households is about five% nationally, this rate is higher among households of lower levels of socioeconomic status. Using the interruption in telephone service as a surrogate for lack of service, we have used a weighting adjustment methodology to compensate for non-telephone coverage in the 2003 Behavioral Risk Factors Surveillance System (BRFSS). Inherent to this methodology is the assumption that persons living in households with interrupted telephone service are similar to those living in households without a telephone. We discuss the construction of the ITSA for BRFSS and evaluate its merits. We will examine the extent of variance inflation that results from applying this additional layer of adjustment and contrast that against the potential gains in bias reduction on selected variables from BRFSS.
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