Measurements of carotid intima media thickness in non-invasive high-frequency ultrasound images: the effect of dynamic range setting

Table 3 Absolute differences in CIMT between the different DR steps

	DR step	ABD		INFO		TOTAL
	DR step	Difference	95% CI	Difference	95% CI	Difference	95% CI
	[dB]	[mm]	[mm]	[mm]	[mm]	[mm]	[mm]
CIMT _mean	40-55	0.032	(0.030, 0.035)	0.037	(0.034, 0.041)	0.034	(0.032, 0.036)
	55-70	0.026	(0.025, 0.028)	0.027	(0.025, 0.030)	0.027	(0.025, 0.028)
	70-85	0.016	(0.014, 0.017)	0.014	(0.012, 0,016)	0.015	(0.014,0.016)
CIMT _max	40-55	0.041	(0.037,0.044)	0.043	(0.039, 0.048)	0.042	(0.039, 0.045)
	55-70	0.029	(0.026,0.032)	0.033	(0.029, 0.038)	0.031	(0.029, 0.033)
	70-85	0.020	(0.018,0.023)	0.015	(0.012, 0.019)	0.018	(0.016, 0.020)

For all comparisons p < 0.001. All differences are given as mean values, and in millimetres.

ISSN: 1476-7120