BACKGROUND Human life expectancy continues to rise in most populations. This rise not only leads to longer lives but also is accompanied by improved health at a given age, that is, recent cohorts show a reduction of biological age for a given chronological age. Despite or even because of the diversity of biomarkers of aging, an accurate quantification of a general shift in biological age across time has been challenging. METHODS Here, we compared age perception of facial images taken in 2001 over a decade and related these changes in age perception to changes in life expectancy. RESULTS We show that age perception changes substantially across time and parallels the progress in life expectancy. In 2012, people aged more than 70 years needed to look 2.3 years younger to be rated the same age as in 2002. CONCLUSIONS Our results suggest that age perception reflects the past life events better than predicts future length of life, that is, it is written in your face how much you have aged so far. We draw this conclusion as age perception among elderly individuals paralleled changes in life expectancy at birth but not changes in remaining life expectancies. We suggest that changes in age perception should be explored for younger age classes to inform on aging processes, including whether aging is delayed or slowed with increasing life expectancy.

中文翻译：

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预期年龄和预期寿命的并行进展。

背景技术在大多数人群中，人们的预期寿命继续增加。这种上升不仅导致寿命更长，而且在给定年龄下还伴随着健康状况的改善，也就是说，最近的队列研究表明，给定年龄下的生物年龄有所减少。尽管或什至由于衰老的生物标志物的多样性，对生物年龄随时间的总体变化的准确量化一直是一个挑战。方法在这里，我们将2001年拍摄的面部图像的年龄感知进行了十年比较，并将年龄感知的这些变化与预期寿命的变化相关联。结果我们显示，年龄感知随着时间的推移而发生显着变化，并且与预期寿命的增长保持平行。在2012年，年龄超过70岁的人需要看起来年轻2.3岁，才能与2002年保持相同的年龄。结论我们的结果表明，年龄感知能更好地反映过去的生活事件，而不是预测未来的寿命，也就是说，您的脸颊上写着到目前为止的年龄。我们得出这一结论，是因为老年人的年龄感知与出生时预期寿命的变化平行，而与剩余寿命的变化没有相似性。我们建议应针对年龄较小的人群探索年龄感知的变化，以告知衰老过程，包括衰老是随着预期寿命的增加而延迟还是减慢。我们得出这一结论，是因为老年人的年龄感知与出生时预期寿命的变化平行，而与剩余寿命的变化没有相似性。我们建议应针对年龄较小的人群探索年龄感知的变化，以告知衰老过程，包括衰老是随着预期寿命的增加而延迟还是减慢。我们得出这一结论，是因为老年人的年龄感知与出生时预期寿命的变化平行，而与剩余寿命的变化没有相似性。我们建议应针对年龄较小的人群探索年龄感知的变化，以告知衰老过程，包括衰老是随着预期寿命的增加而延迟还是减慢。