Table 1.

Baseline characteristics and ABPM findings in the study cohort

	Overall population N=795	No plaque N=217	Any plaque N=578	Small plaque N=493	Large plaque N=85
Age	71±9	68±9	72±9	71±9	76±8
Male,%	38%	35%	39%	41%	31%
Race/ethnicity
White,%	12%	10%	13%	13%	14%
Black, %	16%	16%	16%	15%	19%
Hispanic,%	72%	74%	71%	72%	67%
Cigarette smoking (ever), %	53%	47%	55%	53%	66%
Diabetes mellitus, %	30%	32%	29%	30%	25%
Hypertension, %	78%	71%	81%	79%	88%
Hypercholesterolemia, %	63%	64%	63%	62%	72%
Carotid bifurcation plaque, %	50%	39%	54%	51%	69%
Normal BP dipping status*, %	36%	39%	35%	36%	29%
Anti-hypertensive medication use, %	73%	68%	75%	73%	83%
24hr mean HR, bpm	71.7±9.1	72.1±8.3	71.5±9.4	71.5±9.3	71.7±10.2
Mean HR daytime, bpm	75.0±10.1	75.6±9.4	74.7±10.3	74.7±10.2	74.8±11.0
Mean HR nighttime, bpm	65.8±9.0	65.8±8.6	65.8±9.2	65.6±9.1	66.8±9.7
Clinic SBP, mmHg	135.7±17.8	132.2±16.8	137.0±18.0	136.4±17.6	140.6±20.3
Clinic DBP, mmHg	78.6±9.4	78.3±9.7	78.6±9.3	78.5±9.3	79.3±9.4
24hr mean SBP, mmHg	124.7±14.3	122.2±12.5	125.7±14.9	125.4±14.9	127.5±14.7
24hr mean DBP, mmHg	71.3±8.7	71.3±8.1	71.3±8.9	71.4±8.8	71.3±9.0
SBP nocturnal decline, %	7.3±7.3	7.9±7.1	7.1±7.4	7.3±7.4	5.9±7.3
DBP nocturnal decline, %	10.7±8.2	10.8±7.9	10.7±8.3	10.8±8.6	10.2±6.9
Mean SBP daytime, mmHg	128.3±14.6	126.2±13.1	129.0±15.1	128.8±15.0	130.2±15.7
Mean DBP daytime, mmHg	74.2±9.1	74.3±8.6	74.1±9.3	74.1±9.2	74.3±9.8
Mean SBP night time, mmHg	118.7±16.2	116.1±14.4	119.7±16.8	119.2±16.9	122.5±15.9
Mean DBP night time, mmHg	66.2±9.5	66.3±9.2	66.1±9.7	66.1±9.7	66.5±9.4
SBP daytime variability, mmHg	12.5±3.4	11.8±3.2	12.8±3.5	12.8±3.4	13.2±3.6
DBP daytime variability, mmHg	9.1±2.4	8.9±2.2	9.2±2.5	9.2±2.5	9.1±2.3
SBP nighttime variability, mmHg	10.8±3.4	10.4±3.0	11.0±3.5	10.8±3.5	12.2±3.9
DBP nighttime variability, mmHg	8.1±2.5	8.0±2.3	8.1±2.6	8.1±2.6	8.1±2.5

^*more than 10% decline from awake values