Khanpetch 2012
Definition
A South-East Asian long-bone sex estimation study by Khanpetch and colleagues providing population-specific discriminant functions and cut-offs for Thai and South-East Asian populations, frequently cited alongside Indian data because of shared gracile body build characteristics.
- Region
- South-East Asia, Thai reference population
- Method
- Discriminant function analysis of long bones
- Application
- Sex estimation from skeletal remains
- Cross-reference use
- Cited alongside Indian population data for shared gracile build
Common questions
Why would an Indian forensic anthropologist reference a Thai study like Khanpetch 2012?+
Population-specific discriminant functions lose accuracy when applied across body-build differences, and since South Asian and South-East Asian skeletons tend to be more gracile than the Western reference samples most classic formulas were built on, nearby regional data offers a closer comparison when local standards are incomplete.
What is the main limitation of applying a South-East Asian formula to a different population?+
Even closely related populations can differ enough in stature and bone thickness and shape to shift classification accuracy, so cross-population application should be treated as a supplement pending population-specific validation rather than a substitute for it.
Related terms
- Amelogenin
- A gene on both the X and Y chromosomes used for sex determination in forensic STR kits. The X-allele amplicon is approximately...
- Discriminant Function Analysis
- A multivariate statistical technique that derives linear combinations of measurements to maximally separate two or more groups (male and female). The resulting...
- Femoral Head Vertical Diameter
- The superoinferior diameter of the femoral head, the most reliable single postcranial sex estimation measurement. US cut-offs (Stewart 1979): below 43.5 mm...
- Geometric Morphometrics
- A method that captures biological shape as a configuration of landmark coordinates, removes position/orientation/scale differences by Procrustes superimposition, and analyses the residual...
- Humeral Head Vertical Diameter
- The superoinferior diameter of the humeral head. US cut-offs (France 1998): below 43 mm female, above 47 mm male. Second most commonly...
- Procrustes Superimposition
- The statistical procedure in geometric morphometrics that removes non-shape variation (translation, rotation, scale) from a set of landmark coordinates, leaving only shape...
- Scapular Glenoid Breadth
- The anteroposterior or superoinferior diameter of the glenoid fossa on the scapula. Sexually dimorphic; discriminant functions by Dittrick and Suchey (1986) achieve...
- Stewart 1979 Cut-Offs
- The original US femoral head diameter sex classification thresholds derived by T.D. Stewart from a US military and dissection-room sample. Widely cited...
- Sub-Adult Sex Problem
- The inability of classical morphological and metric osteological methods to determine sex in individuals below approximately 12-15 years of age, because skeletal...