Clinical characteristics of SPECT versus non-SPECT patients
|
SPECT (n=1099) | Non-SPECT1-150(n=656) | p Value | SPECT (n=1099) | Non-SPECT 1-151 (n=1673) | p Value | |
| Age (years) | 58 (11) | 60 (12) | < 0.001 | 58 (11) | 60 (11) | < 0.001 |
| Male sex | 79% | 73% | 0.006 | 79% | 76% | 0.068 |
| History | ||||||
| Angina | 34% | 43% | < 0.001 | 34% | 41% | < 0.001 |
| Previous MI | 15% | 21% | 0.002 | 15% | 18% | 0.029 |
| PTCA or CABG | 8% | 9% | 0.48 | 8% | 7% | 0.29 |
| Hypertension | 42% | 48% | 0.007 | 42% | 44% | 0.29 |
| Diabetes | 15% | 19% | 0.059 | 15% | 16% | 0.88 |
| Never smoked | 31% | 35% | 0.12 | 31% | 33% | 0.037 |
| Anterior infarct | 40% | 45% | 0.084 | 40% | 44% | 0.062 |
| Type of thrombolysis | ||||||
| t-PA | 28% | 20% | < 0.001 | 28% | 24% | 0.017 |
| Streptokinase | 72% | 79% | 72% | 75% | ||
| Other | 0% | 0% | 0% | 1% | ||
| β Blockers before randomisation | 22% | 22% | 0.79 | 22% | 21% | 0.49 |
| At presentation: | ||||||
| Heart rate (beats/min) | 77 (17) | 78 (17) | 0.073 | 77 (17) | 78 (18) | 0.17 |
| Diastolic BP (mm Hg) | 82 (16) | 82 (16) | 0.90 | 82 (16) | 81 (15) | 0.05 |
| Systolic BP (mm Hg) | 132 (24) | 131 (25) | 0.11 | 132 (24) | 132 (25) | 0.71 |
| HR × diastolic BP | 6340 (2152) | 6455 (2126) | 0.27 | 6340 (2152) | 6311 (2100) | 0.73 |
| HR × systolic BP | 10 258 (3397) | 10 292 (3335) | 0.84 | 10 258 (3397) | 10 319 (3389) | 0.64 |
Data are expressed as mean (SD) or as percentage of patients.
↵1-150 In SPECT centres;
↵1-151 in all centres.
BP, blood pressure; CABG, coronary artery bypass graft; HR, heart rate; MI, myocardial infarction; PTCA, percutaneous transluminal coronary angioplasty; SPECT, single photon emission computed tomography; t-PA, tissue plasminogen activator.