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Dental fear and alexithymia among adults in Finland

Abstract Objectives. The aim of this study was to investigate the association between dental fear and alexithymia in a nationally representative adult population sample, controlling for age, gender, education and marital status as well as depressive and anxiety disorders. An additional aim was to evaluate whether gender modified this association. Material and methods. The two-stage stratified cluster sample (n = 8028) represented the Finnish population aged 30 years and older. Participants (n = 5241) answered the question ‘How afraid are you of visiting a dentist?’ They also filled out the 20-Item Toronto Alexithymia Scale (TAS-20), which included three sub-scales, i.e. difficulties in identifying feelings (DIF), difficulties in describing feelings (DDF) and externally oriented thinking (EOT). Anxiety and depressive disorders were assessed with a standardized structured psychiatric interview according to DSM-IV criteria. To evaluate the association between dental fear and alexithymia, multiple logistic regression analyses were performed, adjusting simultaneously for the effects of possible confounding variables. Results. Gender modified the association between dental fear and alexithymia. Among women, those reporting higher scores for TAS-20, DIF and EOT sub-scale scores were more likely to have high dental fear than were those reporting lower scores. Among men no such association was observed. Those participants who reported high DDF sub-scale scores were more likely to have high dental fear than were those reporting lower scores. Conclusions. Alexithymics are more likely to have high dental fear than non-alexithymics are. The findings support the suggestion that some people with dental fear may have internal personality vulnerability to anxiety disorders.