TNNT2 and atrial fibrillation: Using the group with detectable hs‐cTnT concentration at both visits as the reference group, the group that increased from detectable at visit 2 to elevated hs‐cTnT at visit 4 had an higher risk of incident AF (HR = 1.30, 95% CI 1.01–1.68), and that in the group that decreased from detectable at visit 2 to undetectable hs‐cTnT at visit 4 had a lower risk of AF (HR = 0.74, 95% CI 0.59–0.94) in the fully‐adjusted model.