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Modern Modeling Techniques for Adverse Events in Chronic Kidney Disease Patients
Modern Modeling Techniques for Adverse Events in Chronic Kidney Disease Patients
Modern Modeling Techniques for Adverse Events in Chronic Kidney Disease Patients

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20260202103631
ISBN  
9798315791829
DDC  
574
저자명  
Qian, Qi.
서명/저자  
Modern Modeling Techniques for Adverse Events in Chronic Kidney Disease Patients
발행사항  
[Sl] : University of California, Los Angeles, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
179 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-12, Section: B.
주기사항  
Advisor: Senturk, Damla.
학위논문주기  
Thesis (Ph.D.)--University of California, Los Angeles, 2025.
초록/해제  
요약Chronic kidney disease (CKD) affects nearly 15% (37 million) of adults in the United States. End-stage kidney disease (ESKD), the final stage of CKD, impacted over 807,920 individuals in 2020, with approximately 70% receiving dialysis - a life-sustaining treatment. Among CKD patients, the progressive decline in kidney function is closely linked to hospitalizations due to cardiovascular (CV) disease and terminal events such as kidney failure and death. Therefore, jointly modeling the correlated multivariate outcomes of hospitalization and mortality, along with their spatiotemporal patterns and associated risk factors, is essential for improving targeted patient monitoring and intervention.In the first chapter, using national data from the United States Renal Data System (USRDS), we propose a novel multivariate spatiotemporal functional principal component analysis (MST-FPCA) model to study joint spatiotemporal patterns in hospitalization and mortality rates among dialysis patients. This model leverages a multivariate Karhunen-Loeve expansion to capture leading directions of variation across time while inducing spatial correlation among region-specific scores. We develop an efficient estimation procedure that combines only univariate principal component decompositions with a Markov chain Monte Carlo (MCMC) framework to target spatial dependencies. The finite sample performance of the proposed method is studied through simulation studies. Application to the USRDS data identifies geographic "hot spots" in the U.S. with elevated hospitalization and/or mortality rates and highlights time periods of heightened clinical risk.Building on these findings, the second chapter explores the time-varying effects of regional-level covariates on hospitalization and mortality. We propose a multivariate varying coefficient spatiotemporal model (MV-VCSTM) to study the dynamic effects of risk factors (e.g., urbanicity, area deprivation index) on hospitalization and mortality rates as functions of time on dialysis. The proposed model flexibly accommodates time-varying covariate effects on the mean structure while modeling the spatiotemporal correlations of the residuals for efficient inference. Estimation is achieved through a fusion of functional principal component analysis and MCMC techniques, following basis expansions for varying coefficient functions and a multivariate Karhunen-Loeve expansion for region-specific random deviations. The finite sample performance of the proposed method is studied through extensive simulations. Application to the USRDS data uncovers significant regional risk factors and identifies critical time periods on dialysis and geographic areas with increased hospitalization and mortality risks.In the third chapter, we shift focus to individual-level disease progression. We introduce a novel Bayesian multivariate joint model (BM-JM) for the correlated outcomes of longitudinal kidney function (measured by estimated glomerular filtration rate, eGFR), recurrent CV events, and competing-risk terminal events (ESKD and death). The proposed modeling framework facilitates joint estimation of risk factors for each outcome and enables dynamic, personalized prediction of cumulative incidence probabilities for competing risks. These predictions are informed by a subject's baseline characteristics and their history of longitudinal eGFR and recurrent CV events. Estimation and prediction are conducted within a flexible Bayesian framework using MCMC methods. We assess predictive performance via the dynamic area under the receiver operating characteristic curve (AUC) and expected Brier score (BS). Simulation studies demonstrate the model's robustness. Application to data from the Chronic Renal Insufficiency Cohort (CRIC) study illustrates its practical utility and further emphasizes the value of integrating both longitudinal and recurrent event data to improve prognostic accuracy in CKD populations.
일반주제명  
Biostatistics
일반주제명  
Medicine
일반주제명  
Bioinformatics
키워드  
Chronic kidney disease
키워드  
End-stage kidney disease
키워드  
United States Renal Data System
키워드  
Markov chain Monte Carlo
키워드  
CKD population
기타저자  
University of California, Los Angeles Biostatistics 0132
기본자료저록  
Dissertations Abstracts International. 86-12B.
전자적 위치 및 접속  
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MARC

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■24510▼aModern  Modeling  Techniques  for  Adverse  Events  in  Chronic  Kidney  Disease  Patients
■260    ▼a[Sl]▼bUniversity  of  California,  Los  Angeles▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a179  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-12,  Section:  B.
■500    ▼aAdvisor:  Senturk,  Damla.
■5021  ▼aThesis  (Ph.D.)--University  of  California,  Los  Angeles,  2025.
■520    ▼aChronic  kidney  disease  (CKD)  affects  nearly  15%  (37  million)  of  adults  in  the  United  States.  End-stage  kidney  disease  (ESKD),  the  final  stage  of  CKD,  impacted  over  807,920  individuals  in  2020,  with  approximately  70%  receiving  dialysis  -  a  life-sustaining  treatment.  Among  CKD  patients,  the  progressive  decline  in  kidney  function  is  closely  linked  to  hospitalizations  due  to  cardiovascular  (CV)  disease  and  terminal  events  such  as  kidney  failure  and  death.  Therefore,  jointly  modeling  the  correlated  multivariate  outcomes  of  hospitalization  and  mortality,  along  with  their  spatiotemporal  patterns  and  associated  risk  factors,  is  essential  for  improving  targeted  patient  monitoring  and  intervention.In  the  first  chapter,  using  national  data  from  the  United  States  Renal  Data  System  (USRDS),  we  propose  a  novel  multivariate  spatiotemporal  functional  principal  component  analysis  (MST-FPCA)  model  to  study  joint  spatiotemporal  patterns  in  hospitalization  and  mortality  rates  among  dialysis  patients.  This  model  leverages  a  multivariate  Karhunen-Loeve  expansion  to  capture  leading  directions  of  variation  across  time  while  inducing  spatial  correlation  among  region-specific  scores.  We  develop  an  efficient  estimation  procedure  that  combines  only  univariate  principal  component  decompositions  with  a  Markov  chain  Monte  Carlo  (MCMC)  framework  to  target  spatial  dependencies.  The  finite  sample  performance  of  the  proposed  method  is  studied  through  simulation  studies.  Application  to  the  USRDS  data  identifies  geographic  "hot  spots"  in  the  U.S.  with  elevated  hospitalization  and/or  mortality  rates  and  highlights  time  periods  of  heightened  clinical  risk.Building  on  these  findings,  the  second  chapter  explores  the  time-varying  effects  of  regional-level  covariates  on  hospitalization  and  mortality.  We  propose  a  multivariate  varying  coefficient  spatiotemporal  model  (MV-VCSTM)  to  study  the  dynamic  effects  of  risk  factors  (e.g.,  urbanicity,  area  deprivation  index)  on  hospitalization  and  mortality  rates  as  functions  of  time  on  dialysis.  The  proposed  model  flexibly  accommodates  time-varying  covariate  effects  on  the  mean  structure  while  modeling  the  spatiotemporal  correlations  of  the  residuals  for  efficient  inference.  Estimation  is  achieved  through  a  fusion  of  functional  principal  component  analysis  and  MCMC  techniques,  following  basis  expansions  for  varying  coefficient  functions  and  a  multivariate  Karhunen-Loeve  expansion  for  region-specific  random  deviations.  The  finite  sample  performance  of  the  proposed  method  is  studied  through  extensive  simulations.  Application  to  the  USRDS  data  uncovers  significant  regional  risk  factors  and  identifies  critical  time  periods  on  dialysis  and  geographic  areas  with  increased  hospitalization  and  mortality  risks.In  the  third  chapter,  we  shift  focus  to  individual-level  disease  progression.  We  introduce  a  novel  Bayesian  multivariate  joint  model  (BM-JM)  for  the  correlated  outcomes  of  longitudinal  kidney  function  (measured  by  estimated  glomerular  filtration  rate,  eGFR),  recurrent  CV  events,  and  competing-risk  terminal  events  (ESKD  and  death).  The  proposed  modeling  framework  facilitates  joint  estimation  of  risk  factors  for  each  outcome  and  enables  dynamic,  personalized  prediction  of  cumulative  incidence  probabilities  for  competing  risks.  These  predictions  are  informed  by  a  subject's  baseline  characteristics  and  their  history  of  longitudinal  eGFR  and  recurrent  CV  events.  Estimation  and  prediction  are  conducted  within  a  flexible  Bayesian  framework  using  MCMC  methods.  We  assess  predictive  performance  via  the  dynamic  area  under  the  receiver  operating  characteristic  curve  (AUC)  and  expected  Brier  score  (BS).  Simulation  studies  demonstrate  the  model's  robustness.  Application  to  data  from  the  Chronic  Renal  Insufficiency  Cohort  (CRIC)  study  illustrates  its  practical  utility  and  further  emphasizes  the  value  of  integrating  both  longitudinal  and  recurrent  event  data  to  improve  prognostic  accuracy  in  CKD  populations.
■590    ▼aSchool  code:  0031.
■650  4▼aBiostatistics
■650  4▼aMedicine
■650  4▼aBioinformatics
■653    ▼aChronic  kidney  disease
■653    ▼aEnd-stage  kidney  disease
■653    ▼aUnited  States  Renal  Data  System
■653    ▼aMarkov  chain  Monte  Carlo
■653    ▼aCKD  population
■690    ▼a0308
■690    ▼a0564
■690    ▼a0715
■71020▼aUniversity  of  California,  Los  Angeles▼bBiostatistics  0132.
■7730  ▼tDissertations  Abstracts  International▼g86-12B.
■790    ▼a0031
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17358014▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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