Relationship between 1-hour posttransfusion platelet increment and platelet count of the transfused platelet concentrate for PCs, UVB-PCs, F-PCs, and F-APs. In each part of this figure, the 1-hour platelet increment is plotted versus the platelet count of the transfused platelet concentrate for control PCs (A), UVB-PCs (B), F-PCs (C), and F-APs (D). The equations for the regression lines are control PCs: 10.17 + 4.21 × dose × 10¹¹; UVB-PCs: 5.98 + 4.21 × dose × 10¹¹; F-PCs: 4.84 + 5.33 × dose × 10¹¹; and F-APs: 1.08 + 7.28 × dose × 10¹¹. The regression line for the control PCs is plotted as a dotted line in each panel for comparison with the regression line for the treated platelets shown as the solid line in panels B-D.