Partial sum of squares (type III) and F p values for the variables used in the multivariate spline regression model
| CK | TnI | |||||||
| Sum of squares type III | df | F | p Value | Sum of squares type III | df | F | p Value | |
| Diabetes mellitus | 1.06 | 1 | 1.245 | 0.265 | 1.05 | 1 | 0.737 | 0.398 |
| Prior Rx β blockers | 0.28 | 1 | 0.327 | 0.568 | 1.66 | 1 | 1.163 | 0.288 |
| Prior Rx ACE inhibitors | 0.19 | 1 | 0.221 | 0.638 | 0.41 | 1 | 0.284 | 0.590 |
| Hypertension | 4.39 | 1 | 5.158 | 0.023 | 2.32 | 1 | 1.625 | 0.208 |
| Time from symptom onset to reperfusion | 0.25 | 1 | 0.290 | 0.590 | 1.91 | 1 | 1.336 | 0.245 |
| Anterior wall location | 7.43 | 1 | 8.719 | 0.003 | 18.39 | 1 | 12.872 | <0.001 |
| Type of revascularisation | 1.79 | 1 | 2.105 | 0.147 | 0.03 | 1 | 0.018 | 0.897 |
| Week period (weekday vs weekend) | 3.89 | 1 | 4.566 | 0.033 | 3.53 | 1 | 2.470 | 0.114 |
| Season | 4.49 | 3 | 1.758 | 0.154 | 7.57 | 3 | 1.766 | 0.158 |
| Spline curve | 8.72 | 3 | 3.412 | 0.017 | 14.02 | 3 | 3.270 | 0.014 |
Multivariate models adjusted for reference levels (no diabetes, no Rx with β-blocker, no Rx with ACE inhibitor, no history of hypertension, average time of ischaemia (230.48 min), anterior wall STEMI. Revascularisation by primary angioplasty, STEMI onset on weekend, STEMI onset in spring time.
ACE inhibitors, angiotensin converter enzyme inhibitors; AMI, acute myocardial infarction; df, degrees of freedom; F, F statistic; Rx, treatment; TnI, troponin-I.