CRP and diabetes mellitus: Patients in the lowest mtDNA‐CN quartile had hazard ratios of 2.66 (95% CI 1.27–5.58) for all‐cause‐mortality and 1.82 (95% CI 1.02–3.27) for cardiovascular events compared with the combined quartile 2–4 (adjusted for age, smoking, CRP, diabetes, prevalent cardiovascular disease, leukocytes and platelets).