Table 7.

Age-related reference intervals (RIs) for central (aortic) augmentation index (cAIx) for the entire population (n = 1038).

Age (years)	1th	2.5th	5th	10th	25th	50th	75th	90th	95th	97.5th	99th
5.0	1.8	4.5	7.1	10.2	16.0	23.3	31.4	39.4	44.5	49.1	54.7
6.0	−0.1	2.4	4.7	7.5	12.8	19.3	26.7	34.0	38.6	42.8	48.0
7.0	−1.5	0.8	2.9	5.5	10.3	16.4	23.3	30.0	34.3	38.3	43.0
8.0	−2.6	−0.5	1.5	3.9	8.5	14.2	20.6	27.0	31.1	34.8	39.4
9.0	−3.4	−1.5	0.4	2.7	7.0	12.5	18.7	24.8	28.7	32.3	36.6
10.0	−4.1	−2.3	−0.5	1.7	5.9	11.2	17.1	23.0	26.8	30.3	34.5
11.0	−4.7	−2.9	−1.2	1.0	5.0	10.1	15.9	21.7	25.4	28.8	32.9
12.0	−5.2	−3.4	−1.8	0.3	4.3	9.3	15.0	20.7	24.3	27.7	31.7
13.0	−5.6	−3.8	−2.2	−0.2	3.7	8.7	14.3	19.9	23.6	26.9	30.9
14.0	−5.9	−4.2	−2.6	−0.6	3.3	8.2	13.8	19.4	23.0	26.3	30.4
15.0	−6.1	−4.5	−2.9	−0.9	2.9	7.8	13.4	19.1	22.7	26.0	30.1
16.0	−6.4	−4.7	−3.2	−1.1	2.7	7.6	13.2	18.9	22.5	25.9	30.0
17.0	−6.6	−4.9	−3.4	−1.3	2.5	7.4	13.1	18.8	22.5	25.9	30.0
18.0	−6.7	−5.1	−3.5	−1.5	2.4	7.4	13.1	18.9	22.6	26.1	30.3
19.0	−6.8	−5.2	−3.6	−1.6	2.3	7.4	13.2	19.1	22.9	26.4	30.6
20.0	−6.9	−5.3	−3.7	−1.6	2.3	7.4	13.4	19.3	23.2	26.8	31.1
21.0	−7.0	−5.4	−3.8	−1.7	2.3	7.6	13.6	19.7	23.7	27.3	31.8
21.8	−7.1	−5.4	−3.8	−1.7	2.4	7.7	13.8	20.1	24.1	27.8	32.3