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Willem H Collier

Willem H Collier

Assistant Professor Of Clinical Population and Public Health Sciences
Medicine

Contact

wcollier@usc.edu

Comparing Bayesian hierarchical meta-regression methods and evaluating the influence of priors for evaluations of surrogate endpoints on heterogeneous collections of clinical trials BMC Med Res Methodol. 2024 Feb 16; 24(1):39. . View in PubMed

A meta-analysis of GFR slope as a surrogate endpoint for kidney failure Nat Med. 2023 07; 29(7):1867-1876. . View in PubMed

Change in Albuminuria and GFR Slope as Joint Surrogate End Points for Kidney Failure: Implications for Phase 2 Clinical Trials in CKD J Am Soc Nephrol. 2023 06 01; 34(6):955-968. . View in PubMed

Evaluation of Variation in the Performance of GFR Slope as a Surrogate End Point for Kidney Failure in Clinical Trials that Differ by Severity of CKD Clin J Am Soc Nephrol. 2023 02 01; 18(2):183-192. . View in PubMed

Handling missing within-study correlations in the evaluation of surrogate endpoints Stat Med. 2023 11 20; 42(26):4738-4762. . View in PubMed

Characteristics of Nonelderly Adult Health Care Persistent Super Utilizers in Utah Popul Health Manag. 2022 08; 25(4):472-479. . View in PubMed

Patient-reported opioid use for tissue expander-based breast reconstruction J Plast Reconstr Aesthet Surg. 2021 Nov; 74(11):2899-2905. . View in PubMed

A Nationwide Analysis of Early and Late Readmissions following Free Tissue Transfer for Breast Reconstruction J Reconstr Microsurg. 2020 Jul; 36(6):450-457. . View in PubMed

A Comparison of Common Plastic Surgery Operations Using the NSQIP and TOPS Databases Plast Reconstr Surg Glob Open. 2020 May; 8(5):e2841. . View in PubMed

The Rate of Infectious Complications After Intrathecal Drug Delivery System Implant for Cancer-Related Pain Is Low Despite Frequent Concurrent Anticancer Treatment or Leukopenia Anesth Analg. 2020 07; 131(1):280-287. . View in PubMed

2011 ACGME Duty Hour Limits had No Association With Breast Reconstruction Complications J Surg Res. 2020 03; 247:469-478. . View in PubMed

Examining the relationship between epidural steroid injections and patient satisfaction Spine J. 2020 02; 20(2):207-212. . View in PubMed

Direct Comparison of Patient-completed and Physician-completed Caprini Scores for Plastic Surgery Patients Plast Reconstr Surg Glob Open. 2019 Aug; 7(8):e2363. . View in PubMed

Plast Reconstr Surg. 2019 09; 144(3):360e-368e. . View in PubMed

A national analysis of readmissions for wound healing complications following the repair of lower back, hip, and buttock pressure ulcers using the Nationwide Readmissions Database Am J Surg. 2019 04; 217(4):658-663. . View in PubMed

I am an Assistant Professor of Clinical Population and Public Health Sciences in the Division of Biostatistics of the Department of Population and Public Health Sciences at the University of Southern California. I support the design, conduct, and analysis of pediatric cancer clinical trials of the Children's Oncology Group, where I focus on supportive care, survivorship, and cellular therapy trials. I also work on statistical methods for the evaluation of surrogate endpoints, focusing on Bayesian hierarchical modeling for meta-regression. Through my work in surrogate endpoints I collaborate with the Chronic Kidney Disease Epidemiology Collaboration.
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