<p>Kaplan-Meier survival analysis by depression status.</p>

Survival curves comparing metastatic breast cancer patients with clinically significant depression (CSD; BDI-II ≥ 20, red line, n = 49) versus those without CSD (blue line, n = 225) at NSIA-LUTH Cancer Centre, Lagos, Nigeria. Time zero represents date of cancer diagnosis. Shaded areas indicate 95% confidence intervals. Vertical tick marks denote censored observations. The number-at-risk table shows patients remaining under observation at each time point. No significant difference in survival was observed between groups (log-rank p = 0.95). Median follow-up was 756 days with 40 total deaths (14.6%). CSD, clinically significant depression; BDI-II, Beck Depression Inventory-II.