ArticleInternational journal of legal medicine2022
The impact of age mimicry bias on the accuracy of methods for age estimation based on Kvaal's pulp/tooth ratios: a bootstrap study.
Article in International journal of legal medicine, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers, 2 of them syntheses that pooled it.
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14 citing papers in PubMed, 2 syntheses or guidelines pooled it.
- Dental age estimation using the Kvaal method-an evaluation of length and width ratios: a systematic review.Forensic science, medicine, and pathology · 2024Pooled it
- A systematic overview of dental methods for age assessment in living individuals: from traditional to artificial intelligence-based approaches.International journal of legal medicine · 2023Pooled it
- Assessing observer-dependent dental age estimation procedures: intra- and inter-observer reliability across four well established radiographic systems for dental analysis.International journal of legal medicine · 2026Article
- Incisor pulp chamber tomographic image dataset for dental age estimation.Data in brief · 2025Article
- Comparison of original and new South African formulae for age estimation in African Black and white children and adolescents using dental and hand-wrist methods.International journal of legal medicine · 2025Article
- Third molar maturity index for discriminating between adults and minors: validation in an Iranian sample.The Journal of forensic odonto-stomatology · 2024Article
- Application of the Kvaal method to CBCT reconstructed panoramic images for age estimation.Forensic science, medicine, and pathology · 2024Article
- Automated bone age assessment from knee joint by integrating deep learning and MRI-based radiomics.International journal of legal medicine · 2024Article
- Canine sexual dimorphism in crown and root dimensions: a cone-beam computed tomographic study.The Journal of forensic odonto-stomatology · 2024Article
- Machine learning assisted 5-part tooth segmentation method for CBCT-based dental age estimation in adults.The Journal of forensic odonto-stomatology · 2024Article
- Age Estimation in Brazilian Adults Using the Pulp/Tooth Ratio of the Maxillary Canine and Mandibular Second Premolar.Diagnostics (Basel, Switzerland) · 2024Article
- An evaluation of the three-component pubic symphyseal human age estimation method: a CT-based exploration in an Indian population.Die Naturwissenschaften · 2023Article
- Computed tomographic evaluation of the acetabulum for age estimation in an Indian population using principal component analysis and regression models.International journal of legal medicine · 2022Article
- Application of the Kvaal Method in Age Estimation of the Serbian Population Based on Dental Radiographs.Diagnostics (Basel, Switzerland) · 2022Article
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Abstract
introductionMethods based on pulp/tooth ratios proposed by Kvaal et al. (1995) have been widely used for age estimation in adults. The tendency of age estimates to mimic the age structure of the reference population, i.e. age mimicry bias, is a possible source of controversy in the results of studies. The primary objective of the present study was to evaluate the effect of age mimicry bias on the accuracy of the original Kvaal's method and its recent modification proposed by Roh et al. (2018). METHOD AND MATERIAL: The study sample comprised 240 cone-beam computed tomography scans of an Iranian population. The bootstrap procedure was used to study the impact of age mimicry bias on age estimates by constructing reference populations with different age structures. The accuracy of Kvaal's and Roh's variables for age estimation was assessed using a twofold cross-validation technique and principal component analysis.
resultsThe application of original equations resulted in SEE values highly greater than the acceptable threshold for forensic purposes (10 years). The population-specific equations obtained SEE values of 9.18, 11.03, and 9.22 years using Kvaal's variables and 9.19, 11.13, and 9.14 years using Roh's variable for the maxillary, mandibular, and all teeth, respectively. The bootstrap procedure revealed that using uneven reference populations to formulate the equation resulted in significantly greater SEEs (almost all >10 years) that were not acceptable for forensic purposes. Moreover, using an older (a younger) reference population contributed to a sharp rise in the amount of over- (under-) estimation for younger (older) age groups.
conclusionAge mimicry bias had an undesirable impact on the accuracy of dental age estimation based on Kvaal's and Roh's methods. The accuracy of the original equations was low for age estimation in the Iranian sample. However, the performance of the population-specific equations was reasonably acceptable for the maxillary and all six teeth.
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