Fig. 2.
Sensitivity analyses of overall survival. aMethod in main analysis. bEntropy balancing method was applied. Sample sizes are as follows: Mahalanobis distance method: real-world chemotherapy cohort (n = 108) vs. MONARCH 1 (n = 108). Entropy balancing: real-world chemotherapy cohort (n = 281) vs. MONARCH 1 (n = 132). US patients only: real-world chemotherapy cohort (n = 281) vs. US patients only (n = 70). US patients who received prior ET: real-world chemotherapy cohort with prior ET (n = 167) vs. US patients who received prior ET in metastatic setting (n = 62). Abbreviations: ET endocrine therapy
