A new method to estimate adult age-at-death using the acetabulum

Area of Science:

• Forensic Anthropology
• Osteology
• Bioarchaeology

Background:

• Acetabular aging is crucial for forensic anthropology.
• Rissech et al. developed a method for adult males using acetabular traits.
• This method requires simplification and extension to adult females.

Purpose of the Study:

• To simplify and adapt Rissech et al.'s acetabular aging technique for both adult males and females.
• To identify key acetabular traits for accurate age-at-death estimation.
• To validate the revised method on independent samples.

Main Methods:

• Applied Rissech et al.'s method to 100 known-aged adults.
• Used stepwise multiple regression to select three significant variables.
• Developed unique digital renderings for morphological descriptions.
• Tested the revised method on 249 new individuals from two additional samples.
• Assessed intraobserver and inter-rater reliability.

Main Results:

• The revised method estimates age-at-death with 81% accuracy for both sexes combined.
• Three statistically significant acetabular characteristics strongly correlate with age (P < 0.05).
• The method shows particular promise for estimating age in individuals over 65 years.
• Moderate to substantial agreement was found in intraobserver and inter-rater reliability tests.
• Osteophyte development of the acetabular rim was the most inconsistent feature between observers.

Conclusions:

• The simplified and revised acetabular aging method is effective for both adult males and females.
• The technique provides a reliable tool for forensic age estimation, especially for older adults.
• Digital renderings enhance clarity and minimize observer bias in trait assessment.