TNNI3 and atrial fibrillation: After adjusting for CHF, AF, CVD, and mRS score at 3 months, a multivariate Cox survival analysis showed that the elevated cTnI group had significantly higher mortality rates than the normal group (cTnI < 0.03 μg/L, HR, 1.80; 95% CI, 1.2–2.65) (Table 3).