CRP and angina unstable: Similarly, we divided CRP levels in tertiles (lower tertile < 6.52 mg/L and upper tertile > 28 mg/L) and we revealed that those patients in the upper tertile were older, had more often myocardial infarction rather than unstable angina, had higher levels of troponin I at entry, and had lower levels of creatinine clearance (Table 3).