Table 2.
CTA, MPI findings: univariable and multivariate analysis for cardiac events
| Cardiac events (n=27) | No events (n=177) | Annual event rate (%) | Unadjusted HR (95% CI) | p Value | Adjusted HR (95% CI) | p Value | |
|---|---|---|---|---|---|---|---|
| UCT=0 | 8 (6.5%) | 115 (93.5%) | 2.82 | 1 | 1 | ||
| UCT≥1 | 19 (23.5%) | 62 (76.5%) | 8.27 | 3.07 (1.38 to 7.49) | 0.0054 | 2.34* (1.01 to 5.89) | 0.0465 |
| SSS<4 | 4 (3.8%) | 101 (96.2%) | 1.44 | 1 | 1 | ||
| SSS≥4 | 23 (23.2%) | 76 76.8%) | 9.67 | 6.73 (2.59 to 22.96) | <0.0001 | 3.36† (1.18 to 12.12) | 0.0217 |
*HR was adjusted for LVEF, time since CABG, EuroSCORE II and SSS.
†HR was adjusted for LVEF, time since CABG, EuroSCORE II and UCT. Eight events in patients with UCT=0 included three non-fatal MI and five HF, 19 events in UCT≥1 included three cardiac deaths, six non-fatal MIs, three late revascularisations and seven HFs. Four events in patients with SSS<4 included three non-fatal MIs and one late revascularisation, 23 events in SSS≥4 included three cardiac deaths, six non-fatal MIs, two late revascularisations and 12 HFs.
CABG, coronary-artery-bypass grafting; CTA, CT angiography; EuroSCORE II, European System for Cardiac Operative Risk Evaluation risk model; HF, heart failure; LVEF, left ventricular ejection fraction; MPI, myocardial perfusion imaging; SSS, summed stress score; UCT, unprotected coronary territory.