Letters Section Editor: Jody W. Zylke, MD, Senior Editor.
Author Affiliation: Department of Hygiene and Public Health, Teikyo University School of Medicine, Tokyo, Japan (email@example.com).
To the Editor: In a homogeneous cohort of mid-career academic physicians, Dr Jagsi and colleagues reported a significant gender difference in salary even after adjusting for differences in specialty, institutional characteristics, academic productivity, academic rank, work hours, and other factors.1 However, in the final multivariate analyses, a colinearity problem may have affected the results because high correlations would occur between the specialty nature and the specialty pay level and between the number of publications and research time.
Nomura K. Salary Differences by Gender. JAMA. 2012;308(12):1207-1208. doi:10.1001/2012.jama.11174