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Figure 4 CD4⁺CD28^null T Cells and CRP

(A) CD4⁺CD28^null T-cell frequency was significantly higher in patients with unstable angina (UA) and elevated C-reactive protein (CRP) levels (3 mg/l) than in patients with UA and low CRP levels (p < 0.001). Data are presented as in Figure 2. (B) In the overall population including UA and CSA patients, a statistically significant correlation was found between CD4⁺CD28^null T-cell frequencies and CRP levels (r = 0.39; p < 0.001).