Figure 10
Curve fits to progression free survival for (a) sunitinib, (b) interferon-alpha for renal cell carcinoma. Kaplan-Meier graphs are represented by continuous stepped lines joined by dots, curves fit by the proposed method are shown by thick continuous lines, fits used in the original economic evaluation by thin continuous lines, and curves fit by least squares by dotted lines. In (b) the last two curves are almost coincident.