Review Article

C-Reactive Protein: Clinical and Epidemiological Perspectives

Table 4

Studies on acute coronary syndrome prognosis utilizing C-reactive protein.

Author (reference)SampleResults

Pietila et al. [84]188 patients with MISerum CRP levels in patients with MI predict mortality up to 6 months after the event. Highest levels were found between the 2nd and 4th days after infarction, the highest mean concentration being 65 mg/L; IC: 58–71 in patients who survived 24 months.

Gussekloo et al. [85]245 patients (80 deceased due to CVD after 5-year follow-up)CRP is a powerful yet unspecific risk factor for CVD in the elderly. Serum CRP levels of those who died due to CVD were twice as high than those of control subjects (5.7 mg/L versus 2.7 mg/L; ).

Mueller et al. [79]1042 ACS patients without ST segment elevationCRP is an independent predictor of mortality short- and long-term in ACS patients without ST segment elevation who received early invasive treatment. In-hospital mortality was 1.2% in patients with (<3 mg/L), 0.8% (1–3 mg/L), and 3.7% (>10 mg/L), with RR = 4.2 for mortality.

Morrow et al. [78]3813 ACS patientsAfter multiple adjustments, patients with serum CRP levels 1–3 mg/L had a greater mortality risk (HR: 2.3; IC: 1.2–4.6) in comparison with those with levels <1 mg/L. The mortality risk for patients >3 mg/L was even higher (HR: 3.7; IC: 1.9–7.2).

Schiele et al. [86]1901 ACS patientsCRP is modest yet independent predictor of mortality within the first month after ACS. Subjects with levels >22 mg/L (4th quartile) had 4 times greater mortality risk within 30 days.

Caixeta et al. [80]2974 ACS patientsPatients with the highest serum CRP levels (4th quartile) presented a greater mortality risk within 30 days in comparison to the 1st quartile (2.3 versus 1.3%; ), as well as within a year after the event (5.5 versus 2.8%; ).

CRP: C-reactive protein; MI: myocardial infarction; CI: confidence interval; CVD: cerebrovascular disease; ACS: acute coronary syndrome; RR: relative risk; HR: hazard ratios.