JSM 2005 - Toronto

Abstract #304566

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Legend: = Applied Session, = Theme Session, = Presenter
Activity Number: 269
Type: Contributed
Date/Time: Tuesday, August 9, 2005 : 10:30 AM to 12:20 PM
Sponsor: Section on Survey Research Methods
Abstract - #304566
Title: Results of the Variance Component Analysis of Sample Allocation by Age in the National Survey of Drug Use and Health
Author(s): Susan Hunter*+ and Katherine Bowman and James Chromy
Companies: RTI International and RTI International and RTI International
Address: 3040 Cornwallis Rd, RTP, NC, 27709, United States
Keywords: variance component analysis ; parametric variance modeling ; sampling ; surveys
Abstract:

Since 1999, person sampling rates for the National Survey of Drug Use and Health (NSDUH) have been set by state for five age groups: 12 to 17, 18 to 25, 26 to 34, 35 to 49, and 50 or older. The sample design requires equal sample sizes of 22,500 persons for each of three age groups: 12 to 17, 18 to 25, and 26 or older. The sample allocation to the 26 and older group was set in 1999 and adjusted for the 2001 sample. Using parametric variance modeling, the sampling statistician can represent the variance of key estimates as a function of sample design parameters. This paper examines alternative sample allocations to age groups based on an update of variance model parameters for 10 key NSDUH parameters. The results show a larger percentage of the population in the older age groups and increasing use and dependence in these age groups. Thus the sample allocation to older age groups increases.

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