Table 2.
Cross‐Sectional Sample Characteristics by Vital Exhaustion Quartiles: ARIC Visit 2
| Quartile 1 | Quartile 2 | Quartile 3 | Quartile 4 | P Value | |
|---|---|---|---|---|---|
| MVEQ score, range | 0–1 | 2–4 | 5–7 | 8–21 | |
| n | 2419 | 3029 | 1884 | 1992 | |
| Age, y | 56.4 (5.6) | 56.8 (5.6) | 56.7 (5.7) | 56.9 (5.8) | 0.102 |
| Men (%) | 1418 (58.6%) | 1393 (46.0%) | 648 (34.4%) | 569 (28.6%) | <0.001 |
| Race | <0.001 | ||||
| Black | 392 (16.2%) | 605 (20.0%) | 479 (25.4%) | 578 (29.0%) | |
| White | 2027 (83.8%) | 2424 (80.0%) | 1405 (74.6%) | 1414 (71.0%) | |
| Hypertension, n (%) | 584 (24.1%) | 863 (28.5%) | 548 (29.1%) | 680 (34.1%) | <0.001 |
| CHD (%) | 75 (3.10%) | 123 (4.06%) | 84 (4.46%) | 140 (7.03%) | <0.001 |
| DM (%) | 260 (10.7%) | 337 (11.1%) | 241 (12.8%) | 360 (18.1%) | <0.001 |
| HR, beats/min | 66.8 (10.2) | 67.6 (9.81) | 68.0 (9.98) | 69.1 (10.5) | <0.001 |
| Ln HF | 2.09 (1.28) | 2.07 (1.31) | 2.15 (1.30) | 2.08 (1.34) | 0.358 |
| Ln LF | 2.84 (1.31) | 2.74 (1.33) | 2.73 (1.34) | 2.58 (1.41) | <0.001 |
| Ln TP | 3.39 (1.22) | 3.33 (1.25) | 3.36 (1.24) | 3.26 (1.29) | 0.013 |
| LF/HF | 3.08 (3.04) | 2.86 (2.85) | 2.64 (2.67) | 2.48 (2.69) | <0.001 |
| SDNN, ms | 38.6 (18.7) | 37.7 (19.4) | 37.4 (19.7) | 36.1 (18.9) | 0.001 |
| RMSSD, ms | 28.9 (21.9) | 28.6 (22.9) | 29.5 (23.3) | 28.7 (21.3) | 0.99 |
| Ln PNN50 | 1.54 (1.23) | 1.53 (1.25) | 1.57 (1.27) | 1.51 (1.30) | 0.346 |
Vital exhaustion from visit 2 was broken into quartiles. Demographic measures from visit 2 and heart rate variability measures from visit 1 were separated by quartile. Values correspond to mean (SD) or n (%). ARIC indicates Atherosclerosis Risk in Communities; CHD, coronary heart disease; DM, diabetes mellitus; HF, high frequency; HR, heart rate; LF, low frequency; MVEQ, Maastricht Vital Exhaustion Questionnaire; PNN50, proportion of normally conducted RR intervals that differ by more than 50 ms divided by the total number of normally conducted RR intervals; RMSSD, the root mean square of successive differences in normally conducted RR intervals; SDNN, the standard deviation of normally conducted RR intervals; and TP, total frequency power.