McKern-Stewart System
Definition
A three-component pubic symphysis scoring system (dorsal plateau, ventral rampart, symphyseal rim) derived from Korean War skeletal remains; effective for young military males but limited for females and older adults.
- Components scored
- Dorsal plateau, ventral rampart, symphyseal rim
- Anatomical site
- Pubic symphysis
- Reference sample
- Korean War military remains
- Best suited for
- Young adult males
Common questions
Why is this system considered less reliable for females and older adults?+
It was developed and validated on a military sample of young adult males, so the scored features and their progression do not generalise well to female pelvic morphology or to the degenerative changes seen at older ages.
How does it compare to the Todd or Suchey-Brooks pubic symphysis methods?+
It uses a three-component scoring approach rather than a single composite phase, which can offer finer resolution in the young-adult male range where it was calibrated, but it is used alongside or in place of other systems depending on the demographic in the case.
Related terms
- ADBOU Transition Analysis
- A Bayesian software framework (Boldsen, Milner et al. 2002) that combines multiple skeletal age indicators with an adjustable prior age distribution to...
- Auricular Surface
- The ear-shaped articular surface on the medial ilium that participates in the sacroiliac joint; its progressive surface quality changes from fine granularity...
- Buckberry-Chamberlain Five-Trait Composite
- A 2002 revision of the auricular surface method scoring five discrete traits (transverse organisation, texture, microporosity, macroporosity, apical change) summed to a...
- Igarashi Revision
- A 2005 Japanese revision of the auricular surface method identifying slower degeneration rates in Japanese populations compared to European reference samples, requiring...
- Lovejoy Eight-Phase System
- A holistic scoring system for auricular surface age estimation (Lovejoy 1985) describing progressive surface texture, granularity, porosity, and retroauricular changes from young...
- Phase Compression Error
- The forensic reporting error of presenting a narrower age range than the reference method's documented accuracy supports, often to satisfy investigative demands...
- Pubic Symphysis
- The fibrocartilaginous joint at the midline anterior pelvis connecting the two pubic bones; its articular face undergoes progressive morphological changes used for...
- Suchey-Brooks System
- A six-phase scoring system for pubic symphysis age estimation, derived from 1,225 documented Los Angeles County autopsy individuals (1990), providing separate male...
- Todd System
- Thomas Wingate Todd's 1920 ten-phase pubic symphysis scoring system, derived from a cadaveric series at Western Reserve University; the foundational reference that...