In a recent study, Zhang et al. concluded that burnout was associated with poor physical function and low quality of life after acute coronary syndrome (ACS). In our estimation, the authors' study has at least two unnoticed, though major, methodological limitations: not controlling for depression and using a burnout scale that is a questionable choice.
Bianchi, R., Schonfeld, I.S., & Laurent, E. (2017). On parsimony and tautology in the study of acute coronary syndrome. International Journal of Cardiology, 242, 40. doi:10.1016/j.ijcard.2017.02.058