Table 5.
Bland–Altman test between arterial stiffness parameters (Reference Interval Group).
| Part 1 | |||||||||
| (1) cfPWV (Method A) vs. aoPWV: Radial_SCOR, Carotid_SCOR or Brachial_MOG | |||||||||
| Method B | aoPWV_Radial_SCOR | aoPWV_Carotid_SCOR | aoPWV_Brachial_MOG | ||||||
| Differences (Method A-Method B) | |||||||||
| Mean error (m/s) | −0.41 | −0.14 | 0.81 | ||||||
| Mean error, 95% CI (m/s) | −0.5123 to −0.3052 | −0.2624 to −0.009219 | 0.7308 to 0.8833 | ||||||
| Mean error, P (H0: Mean = 0) | 2.99 × 10−14 | 3.55 × 10−2 | <1.0 × 10−14 | ||||||
| Mean error, Lower limit (m/s) | −3.2767 | −3.2661 | −1.1438 | ||||||
| Mean error, 95% CI (m/s) | −3.4538 to −3.0996 | −3.4826 to −3.0497 | −1.2742 to −1.0134 | ||||||
| Mean error, Upper limit (m/s) | 2.4592 | 2.9945 | 2.7578 | ||||||
| Mean error, 95% CI (m/s) | 2.2821 to 2.6363 | 2.7781 to 3.2110 | 2.6274 to 2.8882 | ||||||
| Mean error, Regression Eq. | y = −3.5184 + 0.4766x | y =−5.3391 + 0.7875x | y = −0.1298 + 0.1732x | ||||||
| Parameter | |||||||||
| Intercept, Coeff. (m/s) | −3.5184 | −5.3391 | −0.1298 | ||||||
| Intercept, Coeff. 95% CI (m/s) | −4.0397 to −2.9971 | −6.0251 to −4.6530 | −0.4615 to 0.2019 | ||||||
| Intercept, Coeff. p-value | <1.0 × 10−14 | <1.0 × 10−14 | 0.4425 | ||||||
| Slope | |||||||||
| Slope, Coeff. (m/s/y) | 0.4766 | 0.7875 | 0.1732 | ||||||
| Slope, Coeff. 95% CI (m/s/y) | 0.3980 to 0.5551 | 0.6850 to 0.8900 | 0.1135 to 0.2330 | ||||||
| Slope, Coeff. p-value | <1.0 × 10−14 | <1.0 × 10−14 | 0.000 | ||||||
| (2) aoPWV_Radial_SCOR vs. aoPWV_Carotid_SCOR vs. aoPWV_Brachial_MOG | |||||||||
| Method A | aoPWV_Radial_SCOR | aoPWV_Radial_SCOR | aoPWV_Carotid_SCOR | ||||||
| Method B | aoPWV_Carotid_SCOR | aoPWV_Brachial_MOG | aoPWV_Brachial_MOG | ||||||
| Differences (Method A-Method B) | |||||||||
| Mean error (m/s) | 0.28 | 1.49 | 1.38 | ||||||
| Mean error, 95% CI (m/s) | 0.2122 to 0.3457 | 1.3754 to 1.6096 | 1.2300 to 1.5345 | ||||||
| Mean error, P (H0: Mean = 0) | <1.0 × 10−14 | <1.0 × 10−14 | <1.0 × 10−14 | ||||||
| Mean error, Lower limit (m/s) | −1.3327 | −1.0341 | −1.5492 | ||||||
| Mean error, 95% CI (m/s) | −1.4469 to −1.2185 | −1.2344 to −0.8339 | −1.8097 to −1.2887 | ||||||
| Mean error, Upper limit (m/s) | 1.8907 | 4.0192 | 4.3137 | ||||||
| Mean error, 95% CI (m/s) | 1.7765 to 2.0049 | 3.8189 to 4.2194 | 4.0532 to 4.5742 | ||||||
| Mean error, Regression Eq. | y = 0.2207 + 0.008533x | y = 2.2722−0.1320x | y = 3.3683−0.3309x | ||||||
| Intercept | |||||||||
| Intercept, Coeff. (m/s) | 0.2207 | 2.2722 | 3.3683 | ||||||
| Intercept, Coeff. 95% CI (m/s) | −0.3024 to 0.7437 | 1.5775 to 2.9670 | 2.3609 to 4.3756 | ||||||
| Intercept, Coeff. p-value | 0.4077 | 3.23 × 10−10 | 1.65 × 10−10 | ||||||
| Slope | |||||||||
| Slope, Coeff. (m/s/y) | 0.008533 | −0.132 | −0.3309 | ||||||
| Slope, Coeff. 95% CI (m/s/y) | −0.06737 to 0.08444 | −0.2479 to −0.01605 | −0.4969 to −0.1649 | ||||||
| Slope, Coeff. p-value | 0.8253 | 0.0258 | 0.000 | ||||||
| Part 2 | |||||||||
| (3) CAVI_cfPWV_Real_SCOR (Method A) vs. CAVI_aoPWV: Radial_SCOR, Carotid_SCOR or Brachial_MOG | |||||||||
| Method B | CAVI_aoPWV_Radial_SCOR | CAVI_aoPWV_Carotid_SCOR | CAVI_aoPWV_Brachial_MOG | ||||||
| Differences (Method A-Method B) | |||||||||
| Mean error | −0.89 | −0.12 | 1.81 | ||||||
| Mean error, 95% CI | −1.1609 to −0.6148 | −0.4612 to 0.2183 | 1.6231 to 1.9921 | ||||||
| Mean error, P (H0: Mean = 0) | 3.00 × 10−10 | 4.83 × 10−1 | <1.0 × 10−14 | ||||||
| Mean error, Lower limit | −8.4481 | −8.5235 | −2.9128 | ||||||
| Mean error, 95% CI | −8.9150 to −7.9813 | −9.1045 to −7.9426 | −3.2283 to −2.5973 | ||||||
| Mean error, Upper limit | 6.6724 | 8.2806 | 6.5281 | ||||||
| Mean error, 95% CI | 6.2055 to 7.1392 | 7.6997 to 8.8615 | 6.2126 to 6.8436 | ||||||
| Mean error, Regression Eq. | y = −5.1891 + 0.5399x | y = −6.9488 + 0.8540x | y = 0.5711 + 0.2188x | ||||||
| Intercept | |||||||||
| Intercept, Coeff. | −5.1891 | −6.9488 | 0.5711 | ||||||
| Intercept, Coeff. 95% CI | −6.0114 to −4.3667 | −8.0063 to −5.8912 | 0.1496 to 0.9925 | ||||||
| Intercept, Coeff. p-value | <1.0 × 10−14 | <1.0 × 10−14 | 0.008 | ||||||
| Slope | |||||||||
| Slope, Coeff. | 0.5399 | 0.854 | 0.2188 | ||||||
| Slope, Coeff. 95% CI | 0.4418 to 0.6381 | 0.7272 to 0.9809 | 0.1513 to 0.2862 | ||||||
| Slope, Coeff. p-value | <1.0 × 10−14 | <1.0 × 10−14 | <0.0001 | ||||||
| (4) CAVI_aoPWV_Radial_SCOR vs. CAVI_aoPWV_Carotid_SCOR vs. CAVI_aoPWV_Brachial_MOG | |||||||||
| Method A | CAVI_aoPWV_Radial_SCOR | CAVI_aoPWV_Radial_SCOR | CAVI_aoPWV_Carotid_SCOR | ||||||
| Method B | CAVI_aoPWV_Carotid_SCOR | CAVI_aoPWV_Brachial_MOG | CAVI_aoPWV_Brachial_MOG | ||||||
| Differences (Method A-Method B) | |||||||||
| Mean error | 0.76 | 3.34 | 3.02 | ||||||
| Mean error, 95% CI | 0.5752 to 0.9524 | 3.0420 to 3.6416 | 2.6246 to 3.4233 | ||||||
| Mean error, P (H0: Mean = 0) | <1.0 × 10−14 | <1.0 × 10−14 | <1.0 × 10−14 | ||||||
| Mean error, Lower limit | −3.7885 | −3.1272 | −4.6633 | ||||||
| Mean error, 95% CI | −4.1111 to −3.4660 | −3.6399 to −2.6145 | −5.3464 to −3.9803 | ||||||
| Mean error, Upper limit | 5.3161 | 9.8107 | 10.7112 | ||||||
| Mean error, 95% CI | 4.9936 to 5.6386 | 9.2980 to 10.3235 | 10.0282 to 11.3943 | ||||||
| Mean error, Regression Eq. | y = 0.8012 − 0.004401x | y = 3.9494 − 0.09117x | y = 4.3010 − 0.1895x | ||||||
| Intercept | |||||||||
| Intercept, Coeff. | 0.8012 | 3.9494 | 4.301 | ||||||
| Intercept, Coeff. 95% CI | 0.02191 to 1.5804 | 2.9684 to 4.9304 | 2.9409 to 5.6611 | ||||||
| Intercept, Coeff. p-value | 0.0439 | 1.87 × 10−14 | 1.36 × 10−9 | ||||||
| Slope | |||||||||
| Slope, Coeff. | −0.004401 | −0.09117 | −0.1895 | ||||||
| Slope, Coeff. 95% CI | −0.09345 to 0.08465 | −0.2313 to 0.04899 | −0.3825 to 0.003503 | ||||||
| Slope, Coeff. p-value | 0.9227 | 0.2018 | 0.054 | ||||||
| Part 3 | |||||||||
| (5) CAVIo_cfPWV_Real_SCOR (Method A) vs. CAVIo_aoPWV: Radial_SCOR, Carotid_SCOR orBrachial_MOG | |||||||||
| Method B | CAVIo_aoPWV_Radial_SCOR | CAVIo_aoPWV_Carotid_SCOR | CAVIo_aoPWV_Brachial_MOG | ||||||
| Differences (Method A-Method B) | |||||||||
| Mean error | −1.29 | −0.28 | 2.63 | ||||||
| Mean error, 95% CI | −1.6699 to −0.9076 | −0.7459 to 0.1913 | 2.3706 to 2.8798 | ||||||
| Mean error, P (H0: Mean = 0) | 6.03 × 10−11 | 0.2456 | <1.0 × 10−14 | ||||||
| Mean error, Lower limit | −11.8424 | −11.8658 | −3.8891 | ||||||
| Mean error, 95% CI | −12.4942 to −11.1907 | −12.6671 to −11.0646 | −4.3245 to −3.4538 | ||||||
| Mean error, Upper limit | 9.2649 | 11.3112 | 9.1395 | ||||||
| Mean error, 95% CI | 8.6132 to 9.9166 | 10.5100 to 12.1125 | 8.7041 to 9.5748 | ||||||
| Mean error, Regression Eq. | y = −6.5225 + 0.4651x | y = −8.0619 + 0.6887x | y = 0.5729 + 0.2545x | ||||||
| Intercept | |||||||||
| Intercept, Coeff. | −6.5225 | −8.0619 | 0.5729 | ||||||
| Intercept, Coeff. 95% CI | −7.7702 to −5.2748 | −9.6582 to −6.4655 | −0.04940 to 1.1952 | ||||||
| Intercept, Coeff. p-value | <1.0 × 10−14 | <1.0 × 10−14 | 0.0711 | ||||||
| Slope | |||||||||
| Slope, Coeff. | 0.4651 | 0.6887 | 0.2545 | ||||||
| Slope, Coeff. 95% CI | 0.3591 to 0.5712 | 0.5528 to 0.8246 | 0.1836 to 0.3255 | ||||||
| Slope, Coeff. p-value | <1.0 × 10−14 | <1.0 × 10−14 | 4.61 × 10−12 | ||||||
| (6) CAVIo_aoPWV_Radial_SCOR vs. CAVIo_aoPWV_Carotid_SCOR vs. CAVIo_aoPWV_Brachial_MOG | |||||||||
| Method A | CAVIo_aoPWV_Radial_SCOR | CAVIo_aoPWV_Radial_SCOR | CAVIo_aoPWV_Carotid_SCOR | ||||||
| Method B | CAVIo_aoPWV_Carotid_SCOR | CAVIo_aoPWV_Brachial_MOG | CAVIo_aoPWV_Brachial_MOG | ||||||
| Differences (Method A-Method B) | |||||||||
| Mean error | 1.02 | 4.82 | 4.45 | ||||||
| Mean error, 95% CI | 0.7615 to 1.2788 | 4.3819 to 5.2562 | 3.8948 to 5.0112 | ||||||
| Mean error, P (H0: Mean = 0) | 4.22 × 10−14 | <1.0 × 10−14 | <1.0 × 10−14 | ||||||
| Mean error, Lower limit | −5.2235 | −4.6138 | −6.2933 | ||||||
| Mean error, 95% CI | −5.6658 to −4.7812 | −5.3615 to −3.8662 | −7.2482 to −5.3384 | ||||||
| Mean error, Upper limit | 7.2638 | 14.2519 | 15.1993 | ||||||
| Mean error, 95% CI | 6.8215 to 7.7061 | 13.5042 to 14.9995 | 14.2444 to 16.1542 | ||||||
| Mean error, Regression Eq. | y = 1.4747 − 0.03782x | y = 3.9543 + 0.09114x | y = 4.3849 + 0.007097x | ||||||
| Intercept | |||||||||
| Intercept, Coeff. | 1.4747 | 3.9543 | 4.3849 | ||||||
| Intercept, Coeff. 95% CI | 0.4438 to 2.5056 | 2.4230 to 5.4856 | 2.3751 to 6.3948 | ||||||
| Intercept, Coeff. p-value | 0.0051 | 0.000000562 | 0.0000228 | ||||||
| Slope | |||||||||
| Slope, Coeff. | −0.03782 | 0.09114 | 0.007097 | ||||||
| Slope, Coeff. 95% CI | −0.1209 to 0.04522 | −0.06354 to 0.2458 | −0.1941 to 0.2083 | ||||||
| Slope, Coeff. p-value | 0.3714 | 0.2475 | 0.9447 | ||||||
Eq.: Equation. C.I.: confidence interval. SE: standard error. m: meter. s: second. y: year. Coeff.: Coefficient.