TNNI3 and diabetes mellitus: There was no significant difference between the cTnI positive and negative groups in terms of background illnesses; ischemic heart disease (20% versus 12%, p = 0.2), chronic obstructive pulmonary disease (COPD; 17% versus 12%, p = 0.43), diabetes mellitus (31% versus 17%, p = 0.08), arterial hypertension (34% versus 26%, p = 0.34) or malignancy (6% versus 3%, p = 0.61).