Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 23 for “"Competing Risk"”.
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Advances in Survival Analysis: Accurate Partial Likelihood Computation by Poisson-Binomial Distributions and Nonparametric Competing Risk Cox Model
… approximates conditional probabilities using risk score ratios under a continuous-time assumption. We propose a new accurate partial likelihood computation method based on the Poisson-binomial distribution. Although ties are common in real studies, existing Cox model theory largely overlooks …
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Risk of Lower Extremity Amputation Revision in Patients with Peripheral Vascular Disease Adjusting for a Competing Risk of Death
… (LEA) revision and reamputation adjusting for a competing risk of death, estimate the one-year event-free mortality rates for patients with peripheral vascular disease undergoing LEA, and develop predictive models for LEA revision and reamputation adjusting for a competing risk of death. Methods: …
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Non-parametric competing risks with multivariate frailty models
This research focuses on two theories: (i) competing risks and (ii) random eect (frailty) models. The theory of competing risks provides a structure for inference in problems where cases are subject to several types of failure. Random eects in competing risk models consist of two underlying …
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Contemporary Outcomes of Distal Lower Extremity Bypass for Chronic Limb Threatening Ischemia and a Model Based Comparison with Non-Surgical Therapies
… non-parametric survival analysis with death as a competing risk. A cox proportional hazards model was then fit to the pooled data in a stepwise fashion with death as a competing risk, including evaluations for appropriate transformation, time dependency and interactions for each included …
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Essays on health outcomes and physician practice variation within a public single hospital: the case of Malta
… in the expected relationship between volume and competing risk outcomes and whether this relationship varies in view of different consultant job contract conditions. Finally, Chapter 4 of this thesis studies the behaviour of individual consultants working in the context of the specific incentives …
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Bayesian analysis of spatial and survival models with applications of computation techniques
… are compared. Moreover, for the same data set, competing risks model is considered by incorporating spatial effect to a latent competing risk model from Gelfand et al. (2000). The sampling method mentioned in Berger & Sun (1993) is adapted for efficiency. Finally, spatial confounding occurs when …
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Predictive reliabilities for electronic components
… of multiple mechanisms. Extreme·value theory and competing risk theory are applied to analyze the simultaneous effects of multiple mechanisms. lt is shown that the aggregate failure time distribution has a Weibull form for both the theories. The model explains the influence of physical and …
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Outcomes of infants starting Antiretroviral therapy in Southern Africa
… accelerated disease progression and an increased risk of morbidity and mortality. Advances in evidence gained from trials of the benefits of early initiation of ART in infants have resulted in international treatment guidelines changes and an increase in velocity and coverage of infant ART …
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Dynamic Prediction of Disease Progression With Longitudinal Data
… predicting end-stage renal disease with the competing risk of death, motivated by a study on chronic kidney disease, which efficiently handles the computational challenges of using multiple longitudinal biomarkers through a different factorized likelihood approach and EM algorithm. The model, …
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The Advancements on the Interface of Statistical Computing, Survival Analysis, and Degradation Analysis
… to meet the demands of these applications. In competing risk analysis, computing the exact partial likelihood becomes challenging due to the presence of tied events. The primary challenge comes from computing the denominator of the partial likelihood, which is the risk score for the risk set at …
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Forecasting The Burden Of Dementia In The United States
… have reported declines in the age-specific risk of dementia across sequential birth cohorts. The underlying mechanisms driving this decline remain unclear, nor is it clear whether and to what extent these trends will sustain in the future. Understanding these trends in the context of …
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Credit risk models for mortgage loan loss given default
Arguably, the credit risk models reported in the literature for the retail lending<br/>sector have so far been less developed than those for the corporate sector,<br/>mainly due to the lack of publicly available data. Having been given access to a<br/>dataset on defaulted mortgages kindly provided …
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Homeownership And Unemployment: Outcomes And Implications
… of exit into part-time employment. Results from competing risk models when the transition into full-time and part-time employments are modeled simultaneously also exhibit similar patterns. The final paper investigates job search intensity by unemployed homeowners and renters in the US using the …
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Education and labor market outcomes in South Africa: evidence from the National Income Dynamics Study
… estimate unemployment duration by gender and by competing risk, that is, exits into employment or economic inactivity. We use the Kaplan-Meier estimator and the Cox proportion hazard model in these estimations. The results from both estimators show factors that influence unemployment differ by …
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Identification and Characterization of De Novo Germline Tp53 Mutation Carriers In Families With Li-Fraumeni Syndrome
… to study. Famdenovo.TP53 is a Mendelian Risk prediction model used to predict DNM status of TP53 mutation carriers based on the cancer-family history and several input genetic parameters, including disease-gene penetrance. The good predictive performance of Famdenovo.TP53 was demonstrated …
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Παράγοντες αποτυχίας ενδοπροθετικής αποκατάστασης με ογκολογικές μεγαπροθέσεις μετά από εκτομή όγκων μυοσκελετικού συστήματος / Risk factors for failure of endoprosthetic reconstruction with megaprostheses after musculoskeletal tumor resection
… επιπλέον ανάλυση ανταγωνιστικών κινδύνων (competing risk analysis) με χρήση συναρτήσεων αθροιστικής επίπτωσης, ώστε να ληφθεί υπόψη η επίδραση της θνητότητας ως ανταγωνιστικού γεγονότος. Οι επιπλοκές ταξινομήθηκαν σύμφωνα με την ταξινόμηση του Henderson και εφαρμόστηκαν μονοπαραγοντικά και …
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Diagnostics for joint models for longitudinal and survival data
… and survival data with multiple failure types (competing risk). Using IMPI data set we considered two competing events in the joint model; death and constrictive pericarditis. Using simulation studies and IMPI dataset the developed diagnostics identified influential subjects as well as …
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Time-to-Event Prediction Using Deep Learning Models: Application to GPU Failure Data
… we introduce a deep learning model for competing risks. We develop a custom loss function for competing risks that incorporates survival theory and is specifically adapted for time prediction. We compare this model to other machine learning approaches and benchmark it against a …
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Does the inclusion of the cost and burden of adverse drug reactions associated with drug-resistant TB treatment affect the incremental cost-effectiveness of new treatment regimens? A case study from the introduction of bedaquiline in South Africa National TB Programme
… of drug-resistant TB treatment have the highest risk of mortality. The high early mortality is a real risk that clinicians have to balance when deciding to initiate ART and effective second-line TB treatment both as quickly as possible. Daily injections coupled with taking more than 10 pills each …
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