Motivational Interviewing and Childhood Caries: A Randomised Controlled Trial.

Background: This study tested the occurrence of early childhood caries (ECC) and changes in potential mediators of ECC after an early childhood oral health promotion intervention.

Methods: Consenting parent/child dyads in Western Australia were randomised into test [motivational interviewing (MI) + anticipatory guidance (AG)] or control (lift the lip assessments by child health nurses). A questionnaire at baseline and follow-ups (at 18, 36 and 60 months) evaluated the parental factors and the children clinically examined. Data were analysed using parametric and non-parametric tests for two groups and paired comparisons. Multivariable analysis used negative binomial regression with robust standard errors for over-dispersed count data and effect estimates presented as incidence rate ratios.

Results: Nine hundred and seventeen parent/child dyads were randomised (test = 456; control = 461). The parental attitude toward a child's oral hygiene needs improved among the test group at the first follow-up ( = 377; baseline 1.8, SD 2.2, follow-up 1.5, SD 1.9, = 0.005). Living in a non-fluoridated area and parents holding a fatalistic belief increased the risk of caries (IRR = 4.2, 95% CI 1.8-10.2 and IRR = 3.5, 95% CI 1.7-7.3), respectively, but MI/AG did not reduce the incidence of dental caries.

Conclusion: The brief MI/AG oral health promotion intervention improved parental attitude but did not reduce ECC.