Table 1: Baseline demographics.
| All subjects, n=168 | Subjects with ≤8 comorbidities and >2.2 hours overall mean activity, n=65 | Subjects with >8 comorbidities and ≤2.2 hours overall mean activity, n=27 | |
|---|---|---|---|
| Age, years (SD) | 63.0 (22.8) | 65.0 (10.3) | 74.7 (11.8) |
| Sex, % male | 75.0% | 75.4% | 66.6% |
| BMI, kg/m2 (SD) | 29.5 (15.7) | 30.0 (6.1) | 29.6 (5.1) |
| LVEF, % (SD) | 34.5 (28.8) | 37.9 (12.6) | 36.9 (13.3) |
| Total comorbidities, n (SD) | 7.8 (3.5) | 5.5 (1.9) | 11.8 (3.0) |
| Overall activity level, hours per day (SD) | 2.7 (1.6) | 4.1 (1.4) | 1.5 (0.6) |
| Aetiology, % ischaemic | 57.7% | 44.6% | 70.4% |
| Device type, % ICD | 72.6% | 75.4% | 63.0% |
| NYHA-FC | |||
| I | 48.8% | 61.5% | 29.6% |
| II | 39.3% | 36.9% | 40.7% |
| III | 11.9% | 1.5% | 29.6% |
| ≥1 hospitalisations | 17.3% | 6.2% | 22.2% |
BMI = body mass index; ICD = implantable cardioverter defibrillator (versus bi-ventricular pacemaker); LVEF = left ventricular ejection fraction; NYHA-FC = New York Heart Association-Functional Class; SD = standard deviation.