To the Editor A recent cross-sectional study by Tsugawa et al1 in JAMA Internal Medicine consisting of more than 1.5 million hospitalizations of elderly patients (≥65 years) found that those who were treated by female internists had better outcomes (30-day mortality and 30-day readmissions) vs those cared by male internists. Both the authors of the study and the authors of the corresponding editorial2 appointed some sex differences in medical practice that could explain such results.