Troponin T elevation post-marathon in the 107 athletes who finished the marathon race and who had evaluable ECG data
| Troponin T <50 ng/L n=89 | Troponin T ≥50 ng/L n=18 | Univariate analysis p Value* | Multivariate analysis OR (95% CI) | |
| Age, years, median (IQR) | 48 (45–52) | 49 (45–53) | 0.605 | |
| Female gender, % (n) | 21.3 (19) | 38.9 (7) | 0.114 | |
| Body mass index, kg/m2, mean±SD | 23 (22–25) | 23 (22–25) | 0.723 | |
| Present marathon time, min, median (IQR) | 236 (217–269) | 268 (237–309) | 0.040 | 1.25 (0.83 to 1.87) |
| Marathon runs ≤5 years, n, median (IQR) | 6 (4–10) | 5 (3–8) | 0.327 | |
| Marathon runs total, n, median (IQR) | 9 (6–18) | 7 (5–12) | 0.147 | |
| Regular weekly running, km, median (IQR) | 40 (30–50) | 40 (30–50) | 0.791 | |
| Coexisting hypertension, % (n) | 9.0 (8) | 5.6 (1) | 0.632 | |
| Hyperlipidaemia, % (n) | 3.4 (3) | 0 (0) | 0.429 | |
| ST-T-segment deviation, % (n) | 3.4 (3) | 27.8 (5) | <0.0001 | 9.9 (1.90 to 51.5) |
| Arrhythmias, % (n) | 11.2 (10) | 5.6 (1) | 0.469 | |
| Troponin pre-race, µg/L, median (IQR) | 0.012 (0.012–0.012) | 0.012 (0.012–0.012) | 0.131 | |
| Creatinine pre-race, mg/dL, median (IQR) | 0.86 (0.81–0.96) | 0.85 (0.77–0.97) | 0.761 | |
| Creatinine post-race, mg/dL, median (IQR) | 1.27 (1.11–1.46) | 1.34 (1.17–1.48) | 0.424 | |
| CK post-race, U/L, median (IQR) | 333 (250–412) | 350 (291–611) | 0.263 | |
| CK-MB post-race, U/L, median (IQR) | 35 (28 to 41) | 33 (29 to 52) | 0.609 | |
| Haematocrit post-race, %, median (IQR) | 44 (42–46) | 41 (39–44) | 0.003 | 0.76 (0.62 to 0.92) |
Values are expressed in percent (n), mean±SD or median (IQR) as appropriate. Multivariate analysis was calculated in a binary logistic regression model using backwards selection.
*p Value calculated by χ2 test or Mann-Whitney U test, as appropriate.
CK, creatine kinase.