Table 2.
Demographic characteristics and health status of the study population
| Characteristic | All subjects | Hypertension, Diabetes, or CVD | ||
|---|---|---|---|---|
| No | Yes | P value | ||
| N = 106 | N = 60 | N = 46 | ||
| Age | 56.2 (7.6) | 55.6 (8.2) | 57.1 (6.8) | 0.30 |
| Gender (% Male) | 40.6 | 40.0 | 41.3 | 0.89 |
| Race (% White) | 73.6 | 71.7 | 76.1 | 0.61 |
| Glucose (mg/dL) | 88.8 (25.1) | 84.6 (10.0) | 94.3 (36.0) | 0.09 |
| BMI (kg/m2) | 27.7 (5.9) | 26.2 (4.3) | 29.7 (7.0) | <0.01 |
| CVD (%) | 8.5 | 0.0 | 19.6 | <0.01 |
| Hypertension (%) | 34.9 | 0.0 | 84.8 | <0.01 |
| Diabetes (%) | 7.6 | 0.0 | 17.4 | <0.01 |
| Systolic BP(mm Hg) | 121.9 (15.7) | 117.1 (11.9) | 128.2 (17.9) | <0.01 |
| Diastolic BP (mm Hg) | 75.1 (9.2) | 73.1 (8.3) | 77.6 (9.8) | 0.01 |
| College or higher (%) | 78.3 | 73.3 | 84.8 | 0.16 |
| Inferior Leads | ||||
| ST-II (μV) | 35.4 (38.0) | 40.7 (38.0) | 28.5 (7.0) | <0.01 |
| ST-III (μV) | 19.4 (30.6) | 22.5 (31.8) | 15.4 (28.5) | <0.01 |
| ST-aVF (μV) | 27.4 (33.5) | 31.6(34.2) | 22.0 (31.7) | <0.01 |
| Lateral Leads | ||||
| ST-I (μV) | 15.5 (17.1) | 17.8 (15.3) | 12.6 (18.9) | <0.01 |
| ST-V5 (μV) | 46.8 (48.6) | 55.0 (50.7) | 36.1 (43.5) | <0.01 |
| ST-V6 (μV) | 28.2 (37.7) | 34.4 (38.5) | 20.1 (25.3) | <0.01 |
| Septal Leads | ||||
| ST-V1 (μV) | 40.9 (31.9) | 41.4 (33.2) | 40.4 (30.1) | 0.29 |
| ST-V2 (μV) | 90.64 (56.09) | 94.3 (56.0) | 86.0 (55.9) | <0.01 |
| Anterior Leads | ||||
| ST-V3 (μV) | 91.8 (65.5) | 100.3 (71.3) | 80.8 (55.2) | <0.01 |
| ST-V4 (μV) | 72.5 (56.8) | 81.7 (58.5) | 60.7 (52.4) | <0.01 |
| PM2.5(μg/m3) | 13.6 (21.6) | 11.9 (14.7) | 15.9 (28.0) | <0.01 |
| Temperature (°C) | 21.8 (3.5) | 21.8 (3.7) | 21.7 (3.4) | 0.04 |
| Relative humidity (%) | 39.7 (12.1) | 40.2 (12.3) | 39.0 (11.8) | <0.01 |
Results are presented as mean (SD) for continuous variables and percentage for categorical variables.