Table 2. Demographics and Framingham risk factors for participants included in the study who had distinct measurable minimal and maximal diameters.
| Variable | Values (n = 4719)† |
|---|---|
| Age (years) | 61.7 (10.3 SD) |
| Race/ Ethnicity | |
| White | 1,775 (37.6%) |
| Chinese | 620 (13.1%) |
| African-American | 1243 (26.4%) |
| Hispanic | 1081 (22.9%) |
| Sex (women) | 2389 (50.6%) |
| Smoker | |
| Never | 2429 (51.2%) |
| Previous | 1721 (36.4%) |
| Current | 588 (12.4%) |
| Diabetes (yes) | 432 (9.2%) |
| Systolic Blood Pressure (mmHg) | 124.7 (19.7 SD) |
| LDL cholesterol (mg/dL) | 117.5 (31.4 SD) |
| HDL cholesterol (mg/dL) | 50.6 (14.5 SD) |
| Maximum brachial artery diameter (mm) | 4.90 (0.87 SD) |
| Minimum brachial artery diameter (mm) | 4.33 (0.86 SD) |
| Time to Maximum Diameter (sec) | 55.2 (14.6 SD) |
| Time to Minimum Diameter (sec) | 19.4 (8.9 SD) |
| Total Brachial Artery Reactivity (%) | Mean: 11.3 (9.6 SD) |
| Total Brachial Artery Reactivity (%) | Median: 9.03 (IQR: 5.78, 14.1) |
| Coronary Heart Disease Events | 275 (5.8%) |
| Follow-up (years) | Mean: 12.6 (3.5 SD); median: 14.1 (IQR: 12.7, 14.7) |
† Out of 4734 participants, there were 15 instances of events occurring near enrollment. These cases were excluded.
SD corresponds to standard deviation while IQR indicates inter-quartile range.