Figure 2.

Disease-free survival Cox–Snell residuals by follow-up for male subjects aged 60–65 years by treatment and stage: plots of residuals examines fit of Cox model ((yellow online) lighter lines) and log-normal model ((blue online) darker lines) with factors treatment and stage; for each model (colour), top two lines are stage III with and without-5FU and bottom two lines are stage II with and without 5FU. An adequate fit is indicated with residuals having approximately straight lines.