Purpose: This study examined differences in oral health status and dental treatment needs by HMO regions in Virginia. Methods: The Division of Dental Health (DDH), Virginia Department of Health (VDH), completed the 1999 Virginia Oral Health Needs Assessment (VSOHNA) with the cooperation of the Virginia Department of Education. The survey used a probability proportional to size (PPS) sample design in selecting school children from public schools in the Commonwealth of Virginia. Surface (DMFS/dfs) and tooth-level (DMFT/dft) data were collected as indicators of dental disease on all children. Child-level data was also recorded for each student consisting of age, race, gender, enrollment in a free and reduced lunch program, medical insurance status, dental insurance status, and history of dental visits. A descriptive and regression analysis was completed to examine the relationship between HMO regions and oral health status indicators. Results: The survey included more than 5,000 children in 200 schools and 52 school districts. The mean DMFT/dft levels were 1.47 (.33) and 1.7 (.03), respectively. The mean level of untreated decay (dt) for all schoolchildren was 0.66 (0.01). First graders had the highest levels of untreated disease at 0.71, while third graders had a mean of 0.66. The Central region of the state appeared to have the highest level of untreated decay. Conclusion: There were no significant differences in the percentage of "caries-free" children between the HMO regions. Untreated dental disease of Virginia schoolchildren varied according to the region in which they lived.

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