Carotid Intima Media Thickness Reference Intervals for a Healthy Argentinean Population Aged 11–81 Years

Table 2

Comparative study of left and right common carotid intima media thickness (CIMT).

(a) Regression analysis (left CIMT: -axis, right CIMT: -axis)

	0.4856
Regression equation
Intercept
Coefficient	0.1694
SE	0.02339
95% CI	0.1234 to 0.2154
	<0.0001
Slope
Coefficient	0.7601
SE	0.03902
95% CI	0.6834 to 0.8368
	<0.0001

SE: standard error. CI: confidence interval.

(b) Differences (Bland & Altman)

	Left CIMT − right CIMT [mm]	Left − right CIMT/mean of left and right CIMT
Arithmetic mean	0.029	4.641
95% CI	0.01899 to 0.03933	2.9958 to 6.2852
(: mean = 0)	<0.0001	<0.0001
SD	0.104	16.816
Lower limit	−0.175	−28.319
95% CI	−0.1920 to −0.1572	−31.1321 to −25.5058
Upper limit	0.233	37.600
95% CI	0.2156 to 0.2503	34.7867 to 40.4130
Regression equation
Intercept
Coefficient	−0.029	−0.538
SE	0.026	4.170
-value	−1.135	−0.129
	0.257	0.897
95% CI	−0.07958 to 0.02132	−8.7351 to 7.6595
Slope
Coefficient	0.097	8.626
SE	0.042	6.805
t-value	2.318	1.268
	0.0209	0.206
95% CI	0.01476 to 0.1794	−4.7520 to 22.0044

SE and SD: standard error and standard deviation. Ho: null hypothesis. CI: confidence interval.