Table 1.
Descriptive statistics for participant’s characteristics and dependent and independent variables (total n = 1563, missing data n = 21).
| Normal (n = 1331) Mean ± SD |
Angina present (n = 211) Mean ± SD |
Total (1542) Mean ± SD/frequency (percentage) |
|
|---|---|---|---|
| Sleep efficiency (%) | 49.2 ± 38.10 | 41.82 ± 38.84 | 48.19 ± 38.28 |
| BMI (kg/m2) | 25.57 ± 10.75 | 24.66 ± 10.71 | 25.44 ± 10.75 |
| ADBP (mmHg) | 63.41 ± 24.50 | 58.44 ± 24.19 | 62.73 ± 24.51 |
| ASBP (mmHg) | 119.04 ± 45.48 | 116 ± 47.05 | 118.63 ± 45.70 |
| Sleep N3 (%) | 9.79 ± 11.56 | 7.37 ± 11.05 | 9.46 ± 11.51 |
| Alcohol use (n) | 2.47 ± 6.23 | 2.7 ± 6.40 | 2.5 ± 6.25 |
| Cigarette packs per year (n) | 12.36 ± 19.45 | 20.49 ± 26.43 | 13.47 ± 20.73 |
| Sleep time (minutes) | 233.5 ± 184.39 | 197.09 ± 186.46 | 228.52 ± 185.04 |
| Age (years) | 71.71 ± 9.60 | 73.8 ± 9.22 | 71.99 ± 9.58 |
| Male (n) | 722 (46.2) | ||
| Female (n) | 841 (53.8) |
BMI: body mass index; SD: standard deviation; ADBP: average diastolic blood pressure; ASBP: average systolic blood pressure; Sleep N3: percent time in stage N3 of sleep.