Clinician characteristics associated with fluoride varnish applications during well-child visits

To identify factors associated with clinicians' likelihood and intensity of applying fluoride varnish (FV) overall and for visits paid by Medicaid and private insurers.

Observational study using claims data.

Using the Massachusetts All-Payer Claims Database (2016-2018), we conducted a repeated cross-sectional study of 2911 clinicians (7277 clinician-year observations) providing well-child visits to children aged 1 to 5 years. Zero-inflated negative binomial models estimated the probability of a clinician applying FV and the number of visits with FV applications, overall and separately for visits paid by Medicaid and private insurers.

A total of 30.9% of clinician-years applied FV at least once, and overall, an average of 8.4% of a clinician's well-child visits included FV annually. Controlling for all covariates, having a higher percentage of patients insured by Medicaid was associated with applying FV (OR, 1.35; 95% CI, 1.23-1.45) and a higher expected number of applications (OR, 1.05; 95% CI, 1.02-1.09). Additionally, having a higher percentage of patients aged 1 to 5 years was associated with applying FV (OR, 1.20; 95% CI, 1.01-1.43), but not the number of applications. Similar associations were observed among visits paid by private insurers.

Despite clinical recommendations and mandated insurance reimbursements, the likelihood and intensity of FV applications was low for most pediatric primary care clinicians. Clinician behavior was associated with patient-panel characteristics, suggesting the need for interventions that account for these differences.