Table 1.
Characteristic | Mean | SD |
---|---|---|
Age (years) | 67.98 | 1.38 |
Number of years of school completed | 15.43 | 1.59 |
Number of alcoholic beverages consumed/week |
2.37 | 3.69 |
Number of days smoked at least one cigarette |
0.28 | 1.39 |
Height (in.) | 63.38 | 3.02 |
Weight (lbs.) | 154.34 | 22.09 |
Body mass index (kg/m2) | 27.09 | 4.17 |
Basal SDNN | 34.98 | 35.6 |
Basal MSD | 26.99 | 50.7 |
Basal total power (ms2) | 76,282.74 | 168,758.5 |
Basal HF-HRV (ln ms2) | 4.42 | 1.3 |
Note: SDNN: standard deviation of normal-to-normal interbeat intervals; MSD: mean square successive differences; HF-HRV: high-frequency heart rate variability. The natural log of basal HF-HRV is reported; the original mean is 83.10.