Abstract：
INTRODUCTION:Age assessment based on dental development is often requested in order to assess whether an individual is older or younger than 18 years of age. There are several statistical approaches to estimate age based upon third molar development. The aim of this study was to apply the principles of transition analysis (TA) to a Danish reference material and to evaluate whether it was indicated to include a model that allows for logistic non-linearity as opposed to applying a model only allowing for logistic linearity. For this we chose to use the generalized additive model (gam) and the generalized linear model (glm), respectively. MATERIAL AND METHOD:A cross-sectional sample comprising 1302 panoramic radiographs of Danish subjects in the chronological age range of 13-25 years was included. All present third molars had been scored according to the 10-stage method of Gleiser and Hunt. Each transition from one stage to the subsequent stage was analyzed according to the statistical approach of TA and fitted with both the generalized linear model (glm) and the generalized additive model (gam). In order to assess whether gam or glm was more parsimonious for each transition individually, the Akaikon information criterion (AIC) was applied. RESULTS:The results emphasized the importance of applying a statistical model that sufficiently captures the spread of the age estimate. The AIC values showed that some transitions were sufficiently described by glm whereas for others the gam curves fitted significantly better. CONCLUSION:We recommend that for an age assessment tool based on TA, both a fitting allowing for non-linearity and one allowing only for linearity should be included.
journal_name
Forensic Sci Intjournal_title
Forensic science internationalauthors
Arge S,Wenzel A,Holmstrup P,Jensen ND,Lynnerup N,Boldsen JLdoi
10.1016/j.forsciint.2020.110145subject
Has Abstractpub_date
2020-03-01 00:00:00pages
110145eissn
0379-0738issn
1872-6283pii
S0379-0738(20)30007-4journal_volume
308pub_type
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