Couoh Lourdes R
Postgraduate Division, Faculty of Philosophy and Literature, Institute of Anthropological Research, The National Autonomous University of Mexico [UNAM], Coyoacán, Mexico city, 04510, Mexico.
Am J Phys Anthropol. 2017 Aug;163(4):671-695. doi: 10.1002/ajpa.23236. Epub 2017 May 3.
This analysis seeks to determine whether differences between real and estimated chronological age (CA) with biological age (BA) in skeletal individuals reflect variability in aging.
A total of 87 individuals of two samples, ranging from 20 to 94 years old, were analyzed. One, partially documented, belongs to a Mexican skeletal collection dating to the 20th century; the other is an assemblage of prehispanic individuals from different archaeological sites. In all specimens, the tooth annulation method (TCA) was applied to estimate CA, while-excluding individuals older than 80 years-auricular surface (AS) and pubic symphysis (PS) methods were used to estimate BA. Statistical analyses were conducted to identify correlations and significance of the differences between CA vs. TCA, CA vs. AS/PS, TCA vs. AS/PS. Sex of individuals was assessed for its influence in aging.
The use of TCA to estimate CA was successful for most individuals. A strong correlation was found between CA vs. TCA, CA vs. AS/PS, TCA vs. AS/PS and their differences were significant but variation in these were found when assessed by separate age groups. Sex did not influence such differences.
TCA can be used to estimate CA and its differences with BA, being less than 10 years, are similar to those found in living populations. Differences between CA and BA are due to intra-population variability, which could be the consequence of individual differences in aging. More research is needed to have confidence that under- and overestimations of BA are indicators of aging variability at the level of the individual.
本分析旨在确定骨骼个体的实际与估计实足年龄（CA）与生物学年龄（BA）之间的差异是否反映衰老过程中的变异性。
对两个样本中总共87名年龄在20至94岁之间的个体进行了分析。其中一个样本部分有记录，属于20世纪的墨西哥骨骼收藏；另一个样本是来自不同考古遗址的前西班牙时期个体的集合。在所有标本中，采用牙齿年轮法（TCA）来估计实足年龄，同时在排除80岁以上个体后，使用耳郭表面（AS）和耻骨联合（PS）方法来估计生物学年龄。进行统计分析以确定CA与TCA、CA与AS/PS、TCA与AS/PS之间差异的相关性和显著性。评估个体性别对衰老的影响。
对大多数个体而言，使用TCA估计实足年龄是成功的。发现CA与TCA、CA与AS/PS、TCA与AS/PS之间存在强相关性，它们之间的差异具有显著性，但按不同年龄组评估时发现存在变化。性别并未影响此类差异。
TCA可用于估计实足年龄及其与生物学年龄的差异，该差异小于10岁，与在现有人口中发现的差异相似。实足年龄与生物学年龄之间的差异归因于群体内部的变异性，这可能是个体衰老差异的结果。需要更多研究才能确信生物学年龄的低估和高估是个体水平衰老变异性的指标。
