FIGURE 2.

Comparison in the ACT data between the three approaches to overcome within-interval censoring and study entry times. The figures present the estimated baseline time trends, $\mathrm{e}\mathrm{x}\mathrm{p}\mathrm{i}\mathrm{t}\left({\widehat{\mathit{\alpha }}}_1\right),\mathrm{e}\mathrm{x}\mathrm{p}\mathrm{i}\mathrm{t}\left({\widehat{\mathit{\alpha }}}_2\right)$, and $\mathrm{e}\mathrm{x}\mathrm{p}\left({\widehat{\mathit{\alpha }}}_{\theta }\right)$, under the unstructured specification and the B-spline specification with $\lambda \in \{0.0,2.5\}$ and under the two partitions ${\mathit{\tau }}^{2.5}$ (top panel) and ${\mathit{\tau }}^{5.0}$ (bottom panel). Note that the $y$-axis has been truncated at 0.8 for $\mathrm{e}\mathrm{x}\mathrm{p}\mathrm{i}\mathrm{t}\left({\widehat{\mathit{\alpha }}}_1\right)$ and at 10 for $\mathrm{e}\mathrm{x}\mathrm{p}\left({\widehat{\mathit{\alpha }}}_{\theta }\right)$.