To the Editor The analysis by Blackburn et al1 of early preventive dental care, including the application of fluoride varnish, illustrates important limitations of claims-based analyses.1 The use of real-world data with long-term follow-up and the use of propensity matching to construct a comparison group were notable strengths. However, 2 limitations not addressed by Milgrom and Cunha-Cruz2 in the accompanying editorial warrant further consideration.
Gerald JK. The Benefit of Early Preventive Dental Care for Children. JAMA Pediatr. 2017;171(9):916. doi:10.1001/jamapediatrics.2017.2054
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