Kenneth E. James, PhD

Professor Emeritus

Senior Biostatistician, Health Services Research and Development and Northwest Center for Cooperative Studies in Health Services, Portland VA Medical Center


PhD (1969) University of MinnesotaMS (1967) University of MinnesotaBS (1965) Walla Walla College

Summary of Current Research

Dr. James is an experienced researcher and administrator in biomedical and health services clinical trials, being responsible for the management of clinical trials coordinating centers for eighteen years and involved in the conduct of all phases of multicenter studies in clinical and health services research since 1971.  He is experienced in clinical trials, longitudinal studies and medical testing.  His involvement in these areas has included study design, determination of sample size, study implementation, study monitoring, interim and final data analysis and assisting in the preparation and submission of study results for publication.  Dr. James serves as Senior Biostatistician and Consultant to medical researchers in various departments at Oregon Health & Science University and the Portland VA Medical Center.

Recent Publications

White, R.F., James, K.E., Vasterling, J.J., Marans, K., Delaney, R., Krengel., M, Rose, F. Interrater reliability of neuropsychological diagnoses: A Department of Veterans Affairs cooperative study. Journal of the International Neuropsychological Society (8): 555-565, 2002. White, R.F., James, K.E., Vasterling,


J.J., Letz, R., Marans, K., Delaney, R., Krengel, M., Rose, F., Kraemer, H.C. Neuropsychological screening for cognitive impairment using computer-assisted tasks.  Assessment (10): 86-101, 2003.


James, K.E., White, R.F., Kraemer, H.C. Repeated split sample validation to assess logistic regression and recursive partitioning: an application to the prediction of cognitive impairment. Statistics in Medicine (24):3019-3035, 2005.

Vaughan V., James, K.E. McDermott, D., Griest, S., Fausti, S. A 5-year prospective study of diabetes and hearing loss in a veteran population. Otology and Neurology (27):37-43, 2005. Emmons, S.L., Nichols,

M., Schulkin, J., James, K.E., Cain, J.M. The influence of physician gender on practice satisfaction among obstetrician gynecologists. Am J Obstet Gynecol. (194):1728-1738, 2006.

Christopherson, R., James, K.E., Tableman, M., Marshall, P., Johnson, F. Long-term survival following colon cancer surgery: variation associated with choice of anesthesia. Anesth Analg. (107):325-332, 2008.


Robinson, J.L., Griest, S., James, K. E., Smith, T. L. Impact of aspirin Intolerance on outcomes of sinus surgery. Laryngoscope. (117):825-830, 2007.

Henry J.A., Loovis C., Montero M., Kaelin C., Anselmi K.A., Coombs R., Hensley J., James K.E. Randomized clinical trial: group counseling based on tinnitus retraining therapy. J Rehab Res and Dev. (44):21-32, 2007.


Litvack J.R., Fong K., Mace J., James K.E., Smith T.L. Predictors of olfactory dysfunction in patients with chronic rhinosinusitis. Laryngoscope. (118)2225-2230, 2008.

Henry, J.A., James, K.E., Owens, K.K., Zaugg, T.L., Porsov, E., Silaski, G. Auditory test result characteristics in subjects with and without tinnitus. J Rehab Res and Dev. (46):21-32, 2009.