Table 8.

Age-related reference intervals (RIs) for central (aortic) augmentation index (cAIx) for males (n = 576).

Age (years)	1th	2.5th	5th	10th	25th	50th	75th	90th	95th	97.5th	99th
5.0	4.6	6.0	7.2	8.7	11.4	14.6	18.1	21.4	23.4	25.3	27.5
6.0	1.2	2.7	4.1	5.8	8.9	12.7	16.9	21.0	23.6	26.0	28.8
7.0	−1.1	0.4	1.9	3.7	7.0	11.2	15.9	20.6	23.6	26.3	29.6
8.0	−2.6	−1.1	0.3	2.1	5.6	10.0	15.1	20.2	23.4	26.4	30.0
9.0	−3.6	−2.2	−0.8	1.0	4.5	9.0	14.3	19.7	23.1	26.3	30.2
10.0	−4.3	−3.0	−1.6	0.1	3.6	8.2	13.6	19.1	22.7	26.0	30.0
11.0	−4.8	−3.6	−2.3	−0.5	2.9	7.5	13.0	18.6	22.2	25.6	29.7
12.0	−5.2	−4.0	−2.7	−1.0	2.4	7.0	12.4	18.0	21.7	25.1	29.2
13.0	−5.4	−4.3	−3.1	−1.4	1.9	6.5	11.9	17.5	21.1	24.5	28.7
14.0	−5.6	−4.5	−3.3	−1.7	1.6	6.0	11.4	16.9	20.5	23.8	27.9
15.0	−5.6	−4.6	−3.5	−1.9	1.3	5.6	10.9	16.3	19.8	23.1	27.2
16.0	−5.7	−4.7	−3.5	−2.0	1.1	5.3	10.4	15.7	19.2	22.4	26.3
17.0	−5.7	−4.7	−3.6	−2.1	0.9	5.0	10.0	15.1	18.5	21.6	25.4
18.0	−5.6	−4.6	−3.6	−2.1	0.8	4.8	9.6	14.5	17.7	20.7	24.4
19.0	−5.6	−4.6	−3.5	−2.1	0.7	4.6	9.2	13.9	17.0	19.9	23.4
20.0	−5.4	−4.5	−3.4	−2.1	0.7	4.4	8.8	13.3	16.3	19.0	22.3
21.0	−5.3	−4.3	−3.3	−2.0	0.7	4.2	8.4	12.7	15.5	18.1	21.3
21.6	−5.2	−4.2	−3.2	−1.9	0.7	4.1	8.2	12.4	15.1	17.6	20.6