Incidence of dental anxiety in young adults in relation to dental treatment experience.
OBJECTIVE
To document the incidence of dental anxiety among individuals aged 18 years at baseline and 26 years at follow-up, and to determine if dental treatment experience continues to play a significant etiological role with respect to the onset of dental anxiety in young adults.


METHODS
Dental anxiety scale (DAS; Corah, 1969) scores at ages 15, 18 and 26 were obtained for Study members in the Dunedin Multidisciplinary Health and Development Study. Dental examinations were conducted, and sociodemographic and dental service-use data were collected using a self-report questionnaire. Using a case definition of a DAS score of 13 or more, age 18-26 incident cases were identified and their dental treatment experience and service-use characteristics compared with the remainder.


RESULTS
DAS scores at 18 and 26 were available for 792 (80.8%) of the 980 26-year-old Study members. An increase in dental anxiety prevalence was observed over the eight-year period, with an annualized incidence of 2.1%. Fewer incident cases had visited a dentist in the previous eight years, and there were no differences between incident cases and others in their eight-year DFS, FS or tooth-loss increments. A subgroup of "recurrent" cases was identified who were dentally anxious at 15 and 26 but not at 18, and their eight-year incidence of tooth loss due to caries was substantially higher than non-cases.


CONCLUSIONS
Aversive conditioning experiences appear to be unrelated to the adult onset of dental anxiety, and it may be that particular temperamental or psychological traits are associated with the condition.
Thomson
W M
WM
Department of Oral Health, School of Dentistry, Dunedin, New Zealand. mthomson@gandalf.otago.ac.nz
Locker
D
D
Poulton
R
R
D000293:Adolescent; D000328:Adult; D001362:Avoidance Learning; D016009:Chi-Square Distribution; D015331:Cohort Studies; D004245:DMF Index; D016854:Dental Anxiety / Q000453:epidemiology* / Q000209:etiology* / Q000523:psychology; D003729:Dental Care / Q000009:adverse effects / Q000523:psychology / Q000706:statistics & numerical data; D005260:Female; D006801:Humans; D015994:Incidence; D008137:Longitudinal Studies; D008297:Male; D008347:Manifest Anxiety Scale; D009520:New Zealand / Q000453:epidemiology; D011795:Surveys and Questionnaires