Trajectories of dental anxiety in a birth cohort,’ is now available (see also <http://www.newsrx.com/library/topics/Dentistry.html> Dentistry). “To examine predictors of dental anxiety trajectories in a longitudinal study of New Zealanders. Prospective study of a complete birth cohort born in 1972/73 in Dunedin, New Zealand, with dental anxiety scale (DAS) scores and dental utilization determined at ages 15, 18, 26 and 32 years,” scientists in Dunedin, New Zealand report.

“Personality traits were assessed at a superfactor and (more fine-grained) subscale level via the Multidimensional Personality Questionnaire at age 18 years. Group-based trajectory analysis was used to identify dental anxiety trajectories. DAS scores from at least three assessments were available for 828 participants. Six dental anxiety trajectories were observed: stable nonanxious low (39.6%); stable nonanxious medium (37.9%); recovery (1.6%); adult-onset anxious (7.7%); stable anxious (7.2%) and adolescent-onset anxious (5.9%). Multivariate analysis showed that males and those with higher DMFS at age 15 years were more likely to be in the stable nonanxious low trajectory group. Membership of the stable nonanxious medium group was predicted by the dental caries experience at age 15 years. Participants who had lost one or more teeth between ages 26 and 32 years had almost twice the relative risk for membership of the adult-onset anxious group. Personality traits predicted group membership. Specifically, high scorers (via median split) on the ’stress reaction’ subscale had over twice the risk of being in the stable anxious group; low scorers on the traditionalism subscale were more likely to be members of the recovery trajectory group; and high scorers on the ’social closeness’ subscale had half the risk of being in the stable anxious group. Dental caries experience at age 5 years was also a predictor for the stable anxious group. Membership of the late-adolescent-onset anxious group was predicted by higher dental caries experience by age 15 years, but none of the other predictors was significant. Six discrete trajectories of dental anxiety have been observed. Some trajectories (totalling more than 90% of the cohort) had clear associations with external influences, but others were more strongly associated with characteristics such as personality traits,” wrote W.M. Thomson and colleagues, University of Otago, Faculty of Dentistry.

The researchers concluded: “A mix of both influences was observed with only the stable anxious dental anxiety trajectory.”

Thomson and colleagues published their study in Community Dentistry and Oral Epidemiology (Trajectories of dental anxiety in a birth cohort. Community Dentistry and Oral Epidemiology, 2009;37(3):209-19).

For additional information, contact W.M. Thomson, University of Otago, Dept. of Oral Sciences, Sir John Walsh Research Institute, Faculty of Dentistry, Dunedin, New Zealand.

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