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Figure 5 Kaplan-Meier Cumulative Survival Plot According to CD4⁺CD28^null T-Cell Frequency

The 24-month survival free of readmission for unstable angina, myocardial infarction, and death was significantly higher in patients with a percentage of CD4⁺CD28^null T cells <4% (blue line) than in patients with CD4⁺CD28^null T cells 4% (red line) as assessed by the log rank test (p = 0.004).