Publications by authors named "Rick Chappell"

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Harnessing cognitive trajectory clusterings to examine subclinical decline risk factors.
Lianlian Du, Bruce P Hermann, Erin M Jonaitis, Karly Alex Cody, Leonardo Rivera-Rivera, Rick Chappell

Brain Commun· December 2023

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Associations between self-reported sleep patterns and health, cognition and amyloid measures: results from the Wisconsin Registry for Alzheimer's Prevention.
Lianlian Du, Rebecca Langhough, Bruce P Hermann, Erin Jonaitis, Tobey J Betthauser, Rick Chappell

Brain Commun· February 2023

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How to Do Response-adaptive Randomization (RAR) if You Really Must.
Thevaa Chandereng, Rick Chappell

Clin Infect Dis· August 2021

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NPC-0501 trial on the value of changing chemoradiotherapy sequence, replacing 5-fluorouracil with capecitabine, and altering fractionation for patients with advanced nasopharyngeal carcinoma.
Anne W M Lee, Roger K C Ngan, Wai-Tong Ng, Stewart Y Tung, Ashley A C Cheng, Rick Chappell

Cancer· August 2020

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Imbalanced randomization in clinical trials.
Thevaa Chandereng, Xiaodan Wei, Rick Chappell

Stat Med· July 2020

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Comment on Vickers et al.
Rick Chappell

Clin Trials· April 2019

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Concurrent-Adjuvant Chemoradiation Therapy for Stage III-IVB Nasopharyngeal Carcinoma-Exploration for Achieving Optimal 10-Year Therapeutic Ratio.
Wai-Tong Ng, Stewart Y Tung, Victor Lee, Roger K C Ngan, Horace C W Choi, Rick Chappell

Int J Radiat Oncol Biol Phys· August 2018

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Extended Multiple-Field High-Definition transcranial direct current stimulation (HD-tDCS) is well tolerated and safe in healthy adults.
Christopher A Turski, Alanna Kessler-Jones, Clara Chow, Bruce Hermann, David Hsu, Rick Chappell

Restor Neurol Neurosci· July 2018

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NSAID Use and Incident Cognitive Impairment in a Population-based Cohort.
Margarete A Wichmann, Karen J Cruickshanks, Cynthia M Carlsson, Rick Chappell, Mary E Fischer

Alzheimer Dis Assoc Disord· November 2017

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A multicenter, phase 3, randomized trial of concurrent chemoradiotherapy plus adjuvant chemotherapy versus radiotherapy alone in patients with regionally advanced nasopharyngeal carcinoma: 10-year outcomes for efficacy and toxicity.
Anne W M Lee, Stewart Y Tung, Wai Tong Ng, Victor Lee, Roger K C Ngan, Rick Chappell

Cancer· November 2017

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University of Pennsylvania ninth annual conference on statistical issues in clinical trials: Where are we with adaptive clinical trial designs? (morning panel discussion).
Rick Chappell, Valerie Durkalski, Steven Joffe

Clin Trials· October 2017

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Increased tumor response to neoadjuvant therapy among rectal cancer patients taking angiotensin-converting enzyme inhibitors or angiotensin receptor blockers.
Zachary S Morris, Sandeep Saha, William J Magnuson, Brett A Morris, Jenna F Borkenhagen, Rick Chappell

Cancer· August 2016

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Beta-amyloid and cognitive decline in late middle age: Findings from the Wisconsin Registry for Alzheimer's Prevention study.
Lindsay R Clark, Annie M Racine, Rebecca L Koscik, Ozioma C Okonkwo, Corinne D Engelman, Rick Chappell

Alzheimers Dement· July 2016

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Describing Differences in Survival Curves.
Rick Chappell, Xiaotian Zhu

JAMA Oncol· July 2016

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Sample size under the additive hazards model.
Lee S McDaniel, Menggang Yu, Rick Chappell

Clin Trials· April 2016

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Quality of life outcomes from a dose-per-fraction escalation trial of hypofractionation in prostate cancer.
Jeffrey V Brower, Jeffrey D Forman, Patrick A Kupelian, Daniel G Petereit, Vinai Gondi, Rick Chappell

Radiother Oncol· January 2016

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Quantile regression with a change-point model for longitudinal data: An application to the study of cognitive changes in preclinical alzheimer's disease.
Chenxi Li, N Maritza Dowling, Rick Chappell

Biometrics· September 2015

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Preliminary results of trial NPC-0501 evaluating the therapeutic gain by changing from concurrent-adjuvant to induction-concurrent chemoradiotherapy, changing from fluorouracil to capecitabine, and changing from conventional to accelerated radiotherapy fractionation in patients with locoregionally advanced nasopharyngeal carcinoma.
Anne W M Lee, Roger K C Ngan, Stewart Y Tung, Ashley Cheng, Dora L W Kwong, Rick Chappell

Cancer· April 2015

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Long-term systemic inflammation and cognitive impairment in a population-based cohort.
Margarete A Wichmann, Karen J Cruickshanks, Cynthia M Carlsson, Rick Chappell, Mary E Fischer

J Am Geriatr Soc· September 2014

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University of Pennsylvania 6th annual conference on statistical issues in clinical trials: Dynamic treatment regimes (afternoon session).
Christy Chuang-Stein, Dean Follman, Rick Chappell

Clin Trials· August 2014

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Long-term assessment of systemic inflammation and the cumulative incidence of age-related hearing impairment in the epidemiology of hearing loss study.
Scott D Nash, Karen J Cruickshanks, Weihai Zhan, Michael Y Tsai, Ronald Klein, Rick Chappell

J Gerontol A Biol Sci Med Sci· February 2014

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Long-term variability of inflammatory markers and associated factors in a population-based cohort.
Scott D Nash, Karen J Cruickshanks, Ronald Klein, Barbara E K Klein, F Javier Nieto, Rick Chappell

J Am Geriatr Soc· August 2013

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Water quality sample collection, data treatment and results presentation for principal components analysis--literature review and Illinois River Watershed case study.
Roger L Olsen, Rick W Chappell, Jim C Loftis

Water Res· June 2012

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Association of Biomarkers for Inflammation, Endothelial Dysfunction and Oxidative Stress with Cognitive Impairment. The Epidemiology of Hearing Loss Study (EHLS).
Chidi N Obasi, Karen J Cruickshanks, David M Nondahl, Barbara E K Klein, Ronald Klein, Rick Chappell

Oxid Antioxid Med Sci· June 2012

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Competing risk analyses: how are they different and why should you care?
Rick Chappell

Clin Cancer Res· April 2012

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