Delivery of fluoride varnish during pediatric medical visits by rurality.

Objectives: To examine variation in the delivery of fluoride varnish during pediatric medical visits by rurality.

Methods: This observational study used private health insurance claims (2016-2018) for children aged 1-5 years from Connecticut, Maine, New Hampshire, and Rhode Island linked to the county-level Rural-Urban Continuum codes. County-level Rural-Urban Continuum codes were categorized into three groups: metropolitan, rural, and remote rural. Logistic regression models were used to estimate the odds of a well-child medical visit including fluoride varnish by county rurality, adjusting for other individual and county characteristics.

Results: Among 328,661 pediatric well-child visits paid by private insurance, fluoride varnish was included in 4.3% of visits in metropolitan counties, 6.2% of visits in rural counties, and 10.3% of visits in remote rural counties. There were significantly higher odds of a visit including fluoride varnish in rural remote counties (odds ratio [OR] = 3.5, 95% confidence interval [CI] = 2.3-5.3, p < 0.001) and in rural counties (OR = 2.4, 95% CI = 1.4-4.0, p < 0.001) compared to metropolitan counties. Rates of fluoride varnish during well-child visits increased since 2016 in metropolitan counties and remained stable in rural counties.

Conclusions: All young children are recommended to receive fluoride varnish applications in medical settings, yet overall rates were low. For privately insured young children, pediatric well-child medical visits were more likely to include fluoride varnish in rural and rural remote counties than metropolitan counties.