Figure 3. A threshold value of 3.2% for BAL FoxP3+ cells among CD4+ cells is associated with the development of, versus freedom from, BOS.
The composite level of BAL CD4+FoxP3+ percentages was assessed for both the stable patients and the BOS patients prior to BOS development. A threshold level of 3.2% was identified to distinguish the two groups with respect to the subsequent development of BOS.