Introduction
Materials and methods
Materials
Methods
Visualisation and measurement acquisition
Measurement | Landmarks | Definition |
---|---|---|
Biasterionic breadth (BAST) | ast-ast | Straight line distance from left to right asterion i |
Basion-bregma height (BAB) | b-ba | The distance from basion to bregma i |
Basion-nasion (BNL) | ba-n | The distance from nasion to basion i |
Prosthion-basion (ABL) | pr-ba | The distance from basion to prosthion i |
Maximum cranial length (GOL) | g-op | The straight-line distance from glabella to opisthocranion in the mid-sagittal plane i |
Frontal breadth (FRB) | fpt-fpt | Breadth at the coronal suture, perpendicular to the median plane at the temporal line v |
Bizygomatic breadth (ZYB) | zy-zy | The maximum breadth across the zygomatic arches, perpendicular to the mid-sagittal plane iii |
Foramen magnum length (FML) | fml-fml | The mid-sagittal distance from opisthion to basion iii |
Foramen magnum breadth (FMB) | ba–o | Distance between the lateral margins of the foramen magnum at the point of greatest lateral curvature iii |
Mastoid height (MHL) | ms-po | The direct distance between porion and mastoidale i |
Nasion-Prosthion height (NAH) | n-pr | The distance from nasion to prosthion i |
Nasal height (NLH) | n-ins | Average height from nasion to the lowest point on the border of the nasal aperture on either side ii |
Nasal breadth (NLB) | al-al | Distance between the anterior edges of the nasal aperture at its widest extent i |
Orbit height (OH) | s-or | Height between the upper and lower borders of the orbit. i |
Orbit breadth (OB) | zfo-d | Breadth from dacryon to zygofacial approximating the longitudinal axis that bisects the orbit into equal upper and lower parts v |
Bimaxillary breadth (MXB) | ifz-ifz | Breadth across the maxilla between zygomaxillare i |
Maxillo-alveolar breadth (PAB) | ecm-ecm | The maximum breadth across the alveolar borders of the maxilla measured on the lateral surfaces at the location of ectomalare i |
Biorbital breadth (BOB) | fo-fo | Breadth across the face between the most anterior point on the frontomalare suture on either side v |
Biauricular breadth (BAE) | ae-ae | The least exterior breadth across the roots of the zygomatic processes i |
Interorbital breadth (IOH) | d-d | Distance between left and right dacryon i |
Upper facial breadth (BIB) | fmt-fmt | The distance between the right and left frontomalare temporale iii |
Nasio-occipital length (NOL) | n-op | Maximum length in the mid-sagittal plane, measured from nasion i |
Minimum frontal breadth (MFB) | ft-ft | The distance between the right and left frontotemporal iii |
Cheek height (CH) | ifz-or | Distance between the lower border of the orbit measured from orbitale to the inferior lateral zygomatic border i |
Palate length (PAL) | aic-p | Distance between the anterior incisive canal and the most inferior point on the inter-palatine suture v |
Zygomatic height (ZW) | sz-pz | Height of the zygoma between the superior and inferior zygotemporal junction v |
Palate width (PAW) | mt-mt | Widest point on the palate between the most posterior point on the alveolar margin of the maxillar v |
Nasomaxillary width (NMW) | nm-nm | Distance between the two junctions of the nasomaxillary sutures i |
Canine width (CAW) | ca-ca | Distance between the two canines on the maxilla v |
Glenoid width (GEW) | ge–ge | Breadth of the zygoma directly above the glenoid fossa i |
Palate foramen width (PFW) | pf-pf | Width of the palate at the point of the palatine foramen v |
Canine palate width (CPW) | pca-pca | Width of the palate between the two canines v |
Maxillar height (MAH) | pr-ins | Distance between the alveolar margin and the nasal spine v |
Nasal length (NL) | r-al | Average distance from rhinion to the inferior border of the nasal spine on both sides v |
Bieuryonic breadth (BEU) | eu–eu | The maximum width of the skull perpendicular to the mid-sagittal plane wherever is it located except for the inferior temporal line and the immediate area surrounding the latter iii |
Bizygotemporal breadth (BPZ) | pz-pz | Direct length between both zygotemporale iv |
Statistical analyses
Results
US population (African and European Americans): Giles and Elliot [15]
Discriminant function | Original study | Applied to the Australian population | |||
---|---|---|---|---|---|
Accuracy (%) | Accuracy (%) | ||||
Overall | Overall | Female | Male | Sex bias | |
1 | 86.1 | 72.2 | 46.1 | 98.2 | 52.1 |
2 | 84.6 | 79.2 | 89.3 | 69.2 | − 20.1 |
3 | 85.8 | 83.8 | 76.6 | 90.9 | 14.3 |
4 | 88.8 | 71.8 | 44.8 | 98.7 | 53.9 |
5 | 83.3 | 78.3 | 94.8 | 61.9 | − 32.9 |
6 | 86.0 | 83.5 | 74.5 | 92.5 | 18.0 |
7 | 87.7 | 70.4 | 41.9 | 98.7 | 56.8 |
8 | 84.2 | 83.4 | 89.3 | 77.5 | − 11.8 |
9 | 83.3 | 83.9 | 74.7 | 93.0 | 18.3 |
10 | 83.6 | 80.7 | 70.6 | 90.7 | 20.1 |
11 | 86.6 | 83.4 | 74.0 | 92.8 | 18.8 |
12 | 86.0 | 78.8 | 91.2 | 66.6 | − 24.6 |
13 | 85.8 | 83.4 | 82.0 | 84.7 | 2.7 |
14 | 84.0 | 72.3 | 47.9 | 96.6 | 48.7 |
15 | 84.2 | 83.1 | 92.2 | 74.1 | − 18.1 |
16 | 82.4 | 83.1 | 83.9 | 82.4 | − 1.5 |
17 | 82.4 | 83.9 | 82.8 | 85.0 | 2.2 |
18 | 83.8 | 80.1 | 65.9 | 94.0 | 28.1 |
19 | 84.0 | 75.8 | 55.2 | 96.4 | 41.2 |
20 | 83.3 | 79.9 | 89.1 | 70.9 | − 18.2 |
21 | 83.8 | 80.9 | 69.8 | 92.0 | 22.2 |
Japanese population; Iscan et al. [22] and Ogawa et al. [27]
Discriminant function | Original Studies | Applied to the Australian population | ||||||
---|---|---|---|---|---|---|---|---|
Accuracy (%) | Accuracy (%) | |||||||
Overall | Female | Male | Sex Bias | Overall | Female | Male | Sex Bias | |
Iscan et al. [22] N = 76 (32 female; 44 male)* | ||||||||
2 | 84.1 | 82.8 | 84.1 | 1.3 | 55.1 | 95.3 | 31.3 | − 64.0 |
Ogawa et al. [27] N = 113 (40 female; 73 male) | ||||||||
1 | 87.6 | 88.6 | 87.1 | − 1.5 | 70.7 | 46.6 | 94.6 | 48.0 |
2 | 88.1 | 88.6 | 87.2 | 1.4 | 51.6 | 4.5 | 98.5 | 94.0 |
3 | 85.3 | 84.6 | 85.7 | 1.1 | 50.1 | 9.9 | 97.9 | 88.0 |
4 | 84.8 | 88.6 | 82.9 | − 5.7 | 83.3 | 77.9 | 88.6 | 10.7 |
5 | 87.5 | 88.6 | 87.0 | − 1.6 | 50.1 | 76.0 | 84.2 | 8.2 |
6 | 86.2 | 89.7 | 84.3 | − 5.4 | 51.3 | 4.8 | 97.7 | 92.9 |
7 | 86.4 | 89.7 | 84.5 | − 5.2 | 52.7 | 6.0 | 99.2 | 93.2 |
8 | 85.5 | 84.6 | 85.9 | 1.3 | 69.1 | 20.3 | 97.7 | 77.4 |
Steyn and Iscan (1998) N = 91 (47 female; 44 male) | ||||||||
1 | 85.7 | 85.1 | 86.4 | 1.3 | 80.5 | 64.6 | 96.4 | 31.8 |
2 | 83.5 | 80.9 | 86.4 | 5.5 | 60.0 | 24.2 | 94.3 | 70.1 |
3 | 81.1 | 82.6 | 79.5 | − 3.1 | 80.5 | 72.0 | 88.9 | 16.7 |
Kranioti et al. [23] N = 178 (88 female; 90 male) | ||||||||
1 | 87.1 | 86.9 | 87.2 | 0.3 | 50.0 | 0.0 | 99.7 | 99.7 |
2 | 82.6 | 79.5 | 85.6 | 6.1 | 50.1 | 0.2 | 99.7 | 99.5 |
South African population (European ancestry sample): Steyn and Iscan (1998)
Greek population: Kranioti et al. [23]
Discussion
Measurement* | Australia | USA | Japan | South Africa | Greece |
---|---|---|---|---|---|
Female | |||||
GOL | 181.0 | 174.7 | 171.4 | 179.0 | 172.9 |
BNL | 101.1 | 95.7 | 97.0 | 96.2 | 96.3 |
BEU | 130.6 | 136.4 | 139.1 | NT | 133.9 |
MFB | 97.3 | NT | 91.3 | 93.6 | 93.2 |
BAB | 135.1 | 127.1 | 133.5 | 130.5 | 132.5 |
BIB | 102.4 | NT | 95.6 | NT | 93.2 |
ZYB | 124.9 | 123.6 | 128.9 | 121.9 | 122.1 |
FRB | 114.0 | NT | 115.5 | 113.3 | 119.0 |
MHL | 24.6 | 25.8 | 29 | NT | 28.6 |
Male | |||||
GOL | 189.0 | 183.6 | 179.0 | 187.7 | 181.1 |
BNL | 106.8 | 101.0 | 102.5 | 102.4 | 102.0 |
BEU | 132.8 | 141.2 | 144.1 | NT | 137.6 |
MFB | 99.9 | NT | 95.3 | 97.8 | 96.3 |
BAB | 141.0 | 133.2 | 140.4 | 136.8 | 139.7 |
BIB | 106.1 | NT | 100.5 | NT | 96.3 |
ZYB | 132.0 | 132.6 | 135.9 | 128.9 | 130.5 |
FRB | 117.0 | NT | 119.5 | 119.2 | 122.5 |
MHL | 28.1 | 29.2 | 33.0 | NT | 31.7 |