Dental fear association between mothers and adolescents-a longitudinal study

To assess the longitudinal association between adolescents' and their mothers' dental fear.

A longitudinal questionnaire survey study.

A randomized sample of 12-year-old adolescents were selected from local Hong Kong schools. Adolescents and their mothers self-completed the Modified Dental Anxiety Scale (MDAS). The sociodemographic background of the mothers and the oral health habits of the adolescents were also collected and these measurements were repeated at 15- and 18-years-old. Non-parametric tests (Mann-Whitney U test/Kruskall Wallis test) were used to test associations between MDAS dental fear items and independent variables. Logistic regression (adjusted for family's sociodemographic background and adolescent's oral health habits) was performed to evaluate the longitudinal association between adolescents' and mothers' dental fear.

A total of 212 mother-child pairs were recruited at baseline (12-year-old adolescents). In the first and second follow-ups (15- and 18-years-old), 195 and 182 mother-child pairs completed the survey. Significant associations between mother's and child's scores in "feeling about having their teeth scraped and polished", "having teeth drilled", and 'having an injection in the gum' were found when adolescents were 12- years-old (P < 0.01) and 18-years-old (P < 0.05), but not at 15-years-old.

Adolescents' and mothers' dental fear is associated at 12-years-old and 18-years-old, but not at 15-years-old, which is likely specific to the Hong Kong context but may be extrapolated to other industrialized countries with caution.