JSM 2011 Online Program

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Abstract Details

Activity Number: 427
Type: Contributed
Date/Time: Tuesday, August 2, 2011 : 2:00 PM to 3:50 PM
Sponsor: Section on Survey Research Methods
Abstract - #303306
Title: Comparison of Sampling Methods for a School-Based Population
Author(s): Alana Christie*+ and Barbara Neas
Companies: The University of Oklahoma Health Sciences Center and The University of Oklahoma Health Sciences Center
Address: Department of Biostatistics and Epidemiology, Oklahoma City, OK, 73104,
Keywords: systematic ; weighted ; school-based ; response rate ; simulation
Abstract:

Since 2002, the Oklahoma Dental Health Services have surveyed the dental health of the third grade population to assess the prevalence of caries and sealants. To compare different sampling methods, we simulate a population based on estimates from the previous 6 years of the Oral Health Needs Assessment and the current school percentage free and reduced lunch (FRL) report. Sampling methods include regional random sampling (current method), regional systematic sampling and state-wide systematic sampling. All samples will be of 36 schools with varying school sizes and selected after randomization by FRL percentage. For the two regional methods, the state is divided geographically into 6 regions and 6 schools selected from each region. Preliminary data indicate small differences from the population values when the complete sample is available. When the response rate decreases, both the estimates and variability are generally larger for the weighted estimates. Additional comparisons will focus on variations in the response rates and estimates obtained with and without weighting. Non-response adjustment will be explored.


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