Table 1a.
Baseline characteristics by sleep disordered breathing (N =1173): The Multi-Ethnic Study of Atherosclerosis (2010–2013)
| All | No SDB (AHI < 15) | Moderate or Severe SDB (AHI ≥ 15) | P value | |||
|---|---|---|---|---|---|---|
| N | 1173 | 809 | 364 | |||
| Mean (SD) Median [IQR] |
Mean (SD) Median [IQR] |
Range | Mean (SD) Median [IQR] |
Range | ||
| AHI (/hour) | 13.8 (16.1) 7.9 [2.9–18.0] |
5.4 (4.2) 4.5 [1.9–8.5] |
0.0–14.96 | 32.5(17.1) 26.9 [19.4–40.8] |
15.1–102.9 | |
| RRD (msec) | 119.6 (16.1) | 120.2 (15.9) | 75.2–187.0 | 118.1 (16.8) | 75.4–189.5 | 0.02 |
| RR distance (cm) | 65.3 (3.7) | 65.0 (3.7) | 54–77.1 | 65.9 (3.6) | 56.6–77.3 | <.0001 |
| Age (years) | 67.8 (8.8) | 67.3 (8.8) | 54.0–92.0 | 68.8 (8.8) | 54.0–93.0 | 0.0008 |
| BMI (kg/m2) | 27.4 (4.9) | 26.2 (4.7) | 16.8–47.5 | 29.1 (5.0) | 16.3–49.8 | <.0001 |
| MAP (mm Hg) | 95.4 (11.9) | 94.5(11.7) | 67.0–138.0 | 97.3 (12.1) | 64.3–139.0 | 0.0002 |
| LVEF (%) | 62.0 (7.2) | 62.3 (6.8) | 37.3–82.4 | 61.3 (8.0) | 30.9–82.6 | 0.02 |
| LVEDV (ml) | 119.3 (31.6) | 116.4 (29.6) | 37.4–288.8 | 125.8(34.8) | 55.5–310.2 | <.0001 |
| N (%) | ||||||
| Male | 523 (44.6) | 298 (36.8) | 225 (61.8) | <.0001 | ||
| Race | 0.03 | |||||
| White | 439 (37.4) | 322 (39.8) | 117 (32.1) | |||
| Chinese | 159 (13.6) | 99 (12.2) | 60 (16.5) | |||
| Black | 310 (26.4) | 215 (26.6) | 95 (26.1) | |||
| Hispanic | 265 (22.6) | 173 (21.4) | 92 (25.3) | |||
| Smoking (Current) | 78 (6.7) | 58 (7.2) | 20 (5.5) | 0.5 | ||
| Hypertension | 625 (53.3) | 417(51.6) | 208 (57.1) | 0.08 | ||
| Diabetes | 185 (15.9) | 106 (13.2) | 79 (21.8) | 0.0002 | ||
SDB, sleep disordered breathing; AHI, apnea hypopnea index; BMI, body mass index; MAP, mean arterial pressure; LVEF, left ventricular ejection fraction; LVEDV, left ventricular end diastolic volume; RRD, ECG R-wave to Radial Artery Pulse Delay (unit: msec); RR distance, radial pulse transit path distance. P value is based on independent t test and Chi-square test for continuous and categorical variables respectively.