From “Predictors Between the Subcomponents of Burnout Among Radiology Trainees” by Le et al. in JACR.
Debt level < $200,000 was associated with lower [emotional exhaustion] scores among upper-level trainees and was the only predictor of burnout that significantly affected multiple years of training.
I suspect there is a dose-response above that debt level as well.
Uncertainty breeds despair. Make sure you develop a student loan action plan.