How can I explore high-dimensional data?

Nascimento, Gláucia Cristina Rodrigues; Magno, Marcela Baraúna; Heo, Giseon; Normando, David

doi:10.1590/2176-9451.19.6.014-015.ebo

Cited by 1 publication

(1 citation statement)

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“…Principal component analysis (PCA) with Kaiser normalization varimax rotation was used to extract components by grouping the cephalometric variables in the Class I and Class II groups. 21 , 22 , 25 The components with an eigenvalue higher than 1 were chosen. 18 , 19 After the mean ICC values of each component were calculated, the A value was also calculated for the Class I and Class II groups.…”

Section: Methodsmentioning

confidence: 99%

Differences in the heritability of craniofacial skeletal and dental characteristics between twin pairs with skeletal Class I and II malocclusions

et al. 2021

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Objective To investigate differences in the heritability of skeletodental characteristics between twin pairs with skeletal Class I and Class II malocclusions. Methods Forty Korean adult twin pairs were divided into Class I (C-I) group (0° ≤ angle between point A, nasion, and point B [ANB]) ≤ 4°; mean age, 40.7 years) and Class II (C-II) group (ANB > 4°; mean age, 43.0 years). Each group comprised 14 monozygotic and 6 dizygotic twin pairs. Thirty-three cephalometric variables were measured using lateral cephalograms and were categorized as the anteroposterior, vertical, dental, mandible, and cranial base characteristics. The ACE model was used to calculate heritability (A > 0.7, high heritability). Thereafter, principal component analysis (PCA) was performed. Results Twin pairs in C-I group exhibited high heritability values in the facial anteroposterior characteristics, inclination of the maxillary and mandibular incisors, mandibular body length, and cranial base angles. Twin pairs in C-II group showed high heritability values in vertical facial height, ramus height, effective mandibular length, and cranial base length. PCA extracted eight components with 88.3% in the C-I group and seven components with 91.0% cumulative explanation in the C-II group. Conclusions Differences in the heritability of skeletodental characteristics between twin pairs with skeletal Class I and II malocclusions might provide valuable information for growth prediction and treatment planning.

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