Rod Walker, MS

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“I feel fortunate to have the opportunity to provide biostatistical support across a wide range of KPWHRI collaborations that contribute to public health knowledge and improve health care for patients.”

Rod Walker, MS

Senior Collaborative Biostatistician, Kaiser Permanente Washington Health Research Institute

Rod.L.Walker@kp.org
206-287-2895

Biography

Rod Walker, MS, has developed a diverse research portfolio in his 10+ years working as a biostatistician at KPWHRI. His varied interests have led to collaborations in women's health, cancer, aging and geriatrics, pharmacoepidemiology, opioids research, and mental health. During his tenure he has served as an analyst for the Statistical Coordinating Center for the National Cancer Institute's Breast Cancer Surveillance Consortium, evaluated the impact of health system initiatives to reduce risk associated with chronic opioid therapy prescribing, and investigated potential associations between different medications classes and a wide range of outcomes such as pneumonia, fall-related injury, and dementia.

One of Mr. Walker’s longest-running collaborations is with the Adult Changes in Thought (ACT) study, an ongoing longitudinal cohort study seeking to bolster knowledge of risk factors related to dementia, Alzheimer's disease, and healthy aging. As this project and related studies have grown, he has contributed to analyses of associations between medication use and laboratory values and cognitive outcomes within this cohort of older adults, extended this research to associations with neuropathology measures among autopsied individuals, and helped process and analyze activity monitoring data generated from devices worn by ACT participants. Continued collaboration with ACT-related investigators is a highlight of his research at KPWHRI, as the ACT study provides many avenues for increasing public health knowledge of issues relevant for older adults.

A relatively new area of collaboration for Mr. Walker is with researchers from the Mental Health Research Network seeking to use information captured in electronic health records to predict risk of suicide attempt and suicide death. He has appreciated learning from other investigators and biostatisticians on this project, expanding his knowledge in machine learning and risk prediction, as well as in potential issues surrounding health informatics and implementation of tools into clinical workflows. He looks forward to continued opportunities within this research area to address important public health issues in mental and behavioral health.

Research interests and experience

  • Biostatistics

    Survival and longitudinal data analysis; epidemiology; machine learning; two-phase sampling

  • Aging & Geriatrics

    Biostatistics; cognitive health and dementia; neuropathologic correlates of dementia; factors associated with healthy aging

  • Health Informatics

     

  • Mental Health

    Biostatistics; suicide risk prediction; interventions for risk reduction; machine learning and health informatics

  • Medication Use & Patient Safety

    Biostatistics; pharmacoepidemiology; medication safety in older adults; opioids and chronic pain

  • Women's Health

Recent publications

Goldman LE, Walker R, Miglioretti DL, Smith-Bindman R, Kerlikowske K. Accuracy of diagnostic mammography at facilities serving vulnerable women. Med Care. 2011 Jan;49(1):67-75. PubMed

Miglioretti DL, Walker R, Weaver DL, Buist DS, Taplin SH, Carney PA, Rosenberg RD, Dignan MB, Zhang ZT, White E. Accuracy of screening mammography varies by week of menstrual cycle. Radiology. 2011 Feb;258(2):372-379. Epub 2010 Dec 3. PubMed

Farhat GN, Walker R, Buist DS, Onega T, Kerlikowske K. Changes in invasive breast cancer and ductal carcinoma in situ rates in relation to the decline in hormone therapy use. J Clin Oncol. 2010 Dec 10;28(35):5140-6. Epub 2010 Nov 8. PubMed

Sonnen JA, Larson EB, Walker RL, Haneuse S, Crane PK, Gray SL, Breitner JC, Montine TJ. Nonsteroidal anti-inflammatory drugs are associated with increased neuritic plaques. Neurology. 2010 Sep 28;75(13):1203-10. Epub 2010 Sep 1. PubMed

Dublin S, Walker RL, Jackson ML, Nelson JC, Weiss NS, Jackson LA. Use of proton pump inhibitors and H2 blockers and risk of pneumonia in older adults: a population-based case-control study. Pharmacoepidemiol Drug Saf. 2010 Aug;19(8):792-802. Epub 2010 Jul 7. PubMed

 

COVID-19

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Greater infection risks linked to COVID-19 disparities

New work by Susan Shortreed, PhD, finds infection risks drive worse outcomes for some racial and ethnic groups.

Drugs, diabetes, disparities

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Studying COVID-19 risk and outcomes

Dr. Sascha Dublin tells how studies of KP electronic health record data can improve COVID-19 treatment and prevention.

ACT study

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ACT study: Long-running study of aging examines changes in Kaiser Permanente patients over time

Drs. Larson and Crane co-lead Kaiser Permanente-University of Washington collaboration learning how to promote healthy aging.