Patient characteristics at baseline (pre-CR) overall and by early and late CR groups
| Baseline characteristic | Overall (n=32 899) | Early CR (n=12 254) | Late CR (n=20 645) |
|---|---|---|---|
| Mean age, years (SD) | 64.91 (10.73) | 63.86 (10.76) | 65.54 (10.67)* |
| Gender, n males (%) | 25 012 (77) | 9467 (79) | 15 545 (76)** |
| Ethnicity, n British (%) | 23 191 (86) | 8792 (87) | 14 399 (85)* |
| Post-MI (%) | 4280 (13) | 1313 (11) | 2967 (14)** |
| MI-PCI (%) | 13 331 (40) | 4774 (39) | 8557 (41)** |
| PCI (%) | 7505 (23) | 3320 (27) | 4185 (20)** |
| CABG (%) | 7783 (24) | 2847 (23) | 4936 (25) |
| Mean body mass index (SD) | 27.99 (4.73) | 28.09 (4.73) | 27.93 (4.74)* |
| One or more comorbidities, n (%) | 23 527 (72) | 8469 (69) | 15 058 (73)** |
| Mean systolic blood pressure (SD) | 129.34 (20.07) | 128.60 (19.58) | 129.78 (20.34)* |
| Mean diastolic blood pressure (SD) | 74.31 (11.37) | 74.53 (11.15) | 74.19 (11.50)* |
| Non smoker, n (%) | 18 010 (89) | 7354 (90) | 10 656 (88)** |
| Physical activity ≥150 min/week, n (%) | 9976 (33) | 3976 (35) | 6000 (32)** |
| Healthy fitness status on QoL, n (%) | 11 373 (44) | 4237 (42) | 7136 (45)** |
| Median shuttle-walk distance | 350 m | 360 m | 340 m** |
*p≤0.005 versus early CR.
**p≤0.001 versus early CR.
CABG, coronary artery bypass graft; CR, cardiac rehabilitation; MI, myocardial infarction; PCI, percutaneous coronary intervention; QoL, quality of life.