Fig. 2: CST at 3 and 5 years by quartile.

Boxplots compare (A) final CST and (B) change in CST by each CST variability quartile. Medians are indicated with a line, while mean is indicated by a plus symbol. P-values are denoted on the boxplots, with statistical significance at p < 0.05 (Kruskal–Wallis multiple comparisons with Dunn’s post-hoc analysis).