Skip header and navigation

1 records – page 1 of 1.

A 6-year longitudinal study of caries in teenagers and the effect of "dropouts" on the findings.

https://arctichealth.org/en/permalink/ahliterature139575
Source
Community Dent Health. 2010 Sep;27(3):172-7
Publication Type
Article
Date
Sep-2010
Author
I B Arnadóttir
W P Holbrook
H. Agústsdóttir
S R Saemundsson
Author Affiliation
Faculty of Odontology, University of Iceland Reykjavík, Iceland. iarnad@hi.is
Source
Community Dent Health. 2010 Sep;27(3):172-7
Date
Sep-2010
Language
English
Publication Type
Article
Keywords
Adolescent
Adolescent Behavior
Confounding Factors (Epidemiology)
DMF Index
Dental Caries - epidemiology - radiography
Fisheries
Humans
Iceland - epidemiology
Incidence
Longitudinal Studies
Patient Dropouts - psychology - statistics & numerical data
Prevalence
Questionnaires
Reproducibility of Results
Research Subjects - psychology
Risk-Taking
Rural Population
Urban Population
Young Adult
Abstract
To investigate attrition of subjects in a longitudinal study of caries.
A radiographic study of caries and caries-associated factors was carried out in subjects, initially aged 14 years, and followed-up for six years. Attrition of subjects occurred at the last stage of the study.
A nationwide survey of subjects living in fishing, rural farming, and urban communities in Iceland.
A sub-sample of the nationwide random sample comprising 150 subjects was investigated using bitewing radiographs and a structured questionnaire to determine caries-risk factors. Subjects were re-examined at 16 years and 20 years using the same methods.
Mean caries increment from 14-16 years was 3.0 lesions (1.5 lesions/subject/year) but reduced to 2.6 lesions (0.7 lesions/subject/ year) by 20y. The proportion of subjects found to be caries-free at 14 years, 16 years and 20 years, was 29%, 17% and 10%, respectively. "Dropouts" from this study occurred mostly after 16 years. Analysis of subjects dropping out showed that they were least likely to be from the rural farming community but most likely from the fishing community. Those dropping out attended their dentist less frequently, had a higher consumption of carbonated drinks and a higher prevalence and incidence of caries by 16 years.
Subjects with high-risk behaviours, or residents in a fishing community were more likely to drop out of the study. Recognised advantages of conducting longitudinal studies of caries may, therefore, be lost.
PubMed ID
21046910 View in PubMed
Less detail