did not reach statistical significancep = 0.0556
After sIPTW, the median OS was 31.4 months (95% CI: 25.1–37.8) for the palbociclib plus AI group compared with 21.4 months (95% CI: 14.8–31.6) for the AI-alone group, but the difference did not reach statistical significance (HR = 0.73, 95% CI: 0.52–1.01; p = 0.0556; Figure 2 B).