Normal values of the central arteriosclerosis index are age-related. The central arteriosclerosis degree index mainly reflects the overall stiffness of the central arteries, the principle of which is to characterize the pulse waveform of high cuff pressure above the highest blood pressure to index data, and age is the influence of its normal value range. 1. 40~44 years old, the normal value range is 14~22. 2.45~49 years old, normal value range is 15~23. 3. 50~54 years old, the normal value range is 16~25. 4.55~59 years old, the normal value range is 17~27. 5. 60~64 years old, the normal value range is 18~30. 6.65~69 years old, the normal value range is 20~32. 7.70~74 years old, the normal value range is 22~35. 8.75~79 years old, the normal value range is 23~38. 9.80 years old and above, the normal value range is 25~39. It is recommended to check and treat under the guidance of a physician.