Clinical outcomes
| Before NSF (31 March 2000 or earlier; n = 1993) | After NSF (after 31 March 2000; n = 1378) | p Value | Odds ratio (95% CI) | p Value | |
|---|---|---|---|---|---|
| Data are median (interquartile range) or number (%). Not all variables have complete data. | |||||
| CI, confidence interval; CK, creatine kinase; LVF, left ventricular failure; NA, not applicable; VF, ventricular fibrillation. | |||||
| Odds ratios adjusted for underlying trend, ethnicity, history of ACS, and family history of ischaemic heart disease. Q wave and LVF data adjusted for ethnicity, history of ACS, and family history of ischaemic heart disease (no underlying trend in these variables). Mortality and VF data adjusted for underlying trend, ethnicity, history, and family history. | |||||
| ECG Q waves | 790 (40.6%) | 430 (33.3%) | <0.0001 | 0.72 (0.62 to 0.83) | <0.0001 |
| Peak CK (U/l) | 162 (79–656) | 162 (80–636) | 0.86 | NA | NA |
| Complications | |||||
| VF | 51 (2.6%) | 25 (1.8%) | 0.15 | 1.48 (0.58 to 3.78) | 0.42 |
| LVF | 313 (15.9%) | 167 (12.3%) | 0.003 | 0.74 (0.60 to 0.91) | 0.004 |
| In-hospital deaths | 95 (4.8%) | 43 (3.2%) | 0.02 | 0.39 (0.2 to 0.77) | 0.007 |