Fig. 8: The distribution of ARDA across instances and ages.

The threshold of the ageing-significant region is set to the 75-th percentile. For each instance, the points on the line and the interval indicate the mean of the ageing salience and the interval of mean ± standard deviation of the ageing salience, respectively. A point in the instance of mandibular bone is selected as the example. This point shows that the mean and standard deviation of the ageing salience of 3018 subjects are 0.089 and 0.015 for mandibular bone at the age of 20 years, respectively.