Evidence map›Paper›PMID 33179173›Full record

ArticleInternational journal of legal medicine2021

Machine learning approaches for sex estimation using cranial measurements.

Diana Toneva, Silviya Nikolova, Gennady Agre, Dora Zlatareva, Vassil Hadjidekov, Nikolai Lazarov

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Article in International journal of legal medicine, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

27 citing papers in PubMed.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Diana TonevaDepartment of Anthropology and Anatomy, Institute of Experimental Morphology, Pathology and Anthropology with Museum, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 25, 1113, Sofia, Bulgaria. ditoneva@abv.bg.ORCID https://orcid.org/0000-0001-7424-9704
Silviya NikolovaDepartment of Anthropology and Anatomy, Institute of Experimental Morphology, Pathology and Anthropology with Museum, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 25, 1113, Sofia, Bulgaria.ORCID https://orcid.org/0000-0001-5001-0707
Gennady AgreDepartment of Linguistic Modelling and Knowledge Processing, Institute of Information and Communication Technologies, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria.ORCID https://orcid.org/0000-0003-4610-7973
Dora ZlatarevaDepartment of Diagnostic Imaging, Medical University of Sofia, 1431, Sofia, Bulgaria.ORCID https://orcid.org/0000-0001-5298-2278
Vassil HadjidekovDepartment of Diagnostic Imaging, Medical University of Sofia, 1431, Sofia, Bulgaria.
Nikolai LazarovDepartment of Anatomy and Histology, Medical University of Sofia, 1431, Sofia, Bulgaria.ORCID https://orcid.org/0000-0003-3420-4346

Funding

Bulgarian National Science Fund DN11/9-15.12.2017Bulgarian National Science Fund (BG) DN01/15-20.12.2016
6 · The paper itself

Abstract

The aim of the present study is to apply support vector machines (SVM) and artificial neural network (ANN) as sex classifiers and to generate useful classification models for sex estimation based on cranial measurements. Besides, the performance of the generated sub-symbolic machine learning models is compared with models developed through logistic regression (LR). The study was carried out on computed tomography images of 393 Bulgarian adults (169 males and 224 females). The three-dimensional coordinates of 47 landmarks were acquired and used for calculation of the cranial measurements. A total of 64 measurements (linear distances, angles, triangle areas and heights) and 22 indices were calculated. Two datasets were assembled including the linear measurements only and all measurements and index, respectively. An additional third dataset comprising all possible interlandmark distances between the landmarks was constructed. Two machine learning algorithms-SVM and ANN and a traditional statistical analysis LR-were applied to generate models for sex estimation. In addition, two advanced attribute selection techniques (Weka BestFirst and Weka GeneticSearch) were used. The classification accuracy of the models was evaluated by means of 10 × 10-fold cross-validation procedure. All three methods achieved accuracy results higher than 95%. The best accuracy (96.1 ± 0.5%) was obtained by SVM and it was statistically significantly higher than the best results achieved by ANN and LR. SVM and ANN reached higher accuracy by training on the full datasets than the selection datasets, except for the sample described by the interlandmark distances, where the reduction of attributes by the GeneticSearch algorithm improved the accuracy.

Indexed as

Neural Networks, ComputerSupport Vector MachineAdolescentAdultAgedAged, 80 and overAnatomic LandmarksBulgariaCephalometryDatasets as TopicFemaleHumansLogistic ModelsMaleMiddle AgedReproducibility of ResultsArtificial neural networkComputed tomographyCranial measurementsMachine learningSex estimationSupport vector machine

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.