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 57 for “"Cox Proportional Hazard"”.
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The Influence of Diversity on Government Durations in Parliamentary Systems
… cabinets across 12 countries and applied Cox proportional-hazard modeling to examine the relationships between age and education and the duration of governments in parliamentary systems. The independent variables were age and education level for members of parliamentary governments across …
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A Cox proportional hazards-cash flow model for bank failure prediction
This research uses the Cox proportional hazard model and bank cash flow information to determine whether adding cash flow information will improve current bank failure prediction methods. In two published papers it has been shown that the Cox model performs as well as other models with respect to …
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Predictors of Contralateral Breast Cancer In Brca Negative Women
… at between the two groups. Using univariable Cox Proportional Hazard model, thirteen statistically interesting risk factors were found, defined as having a p-value under 0.2. Multivariable stepwise Cox Proportional Hazard model found four statistically significant variables out of the thirteen …
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Natural History and Affecting Factors on Progression of Prehypertension and Prediabetes
… 615 per 1,000 person-year respectively. In the Cox proportional hazard model, changes of CVD risk factors such as abstinence from drink, participating in a regular exercise, and reducing body mass index (BMI) level, and controlling total cholesterol (TC) level played a protective role on …
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Survival Model and Estimation for Lung Cancer Patients.
… we assume an exponential form for the baseline hazard function and combine Cox proportional hazard regression for the survival study of a group of lung cancer patients. The covariates in the hazard function are estimated by maximum likelihood estimation following the proportional hazards …
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Semi-parametric models for response times and response accuracy in computerized testing
… parametric modeling. They are 1. Hierarchical proportional hazard model: This model adopts the hierarchical structure suggested by van der Linden (2007) with the well-known Cox proportional hazard (PH) model in survival analysis. The PH model is comprised of two parts: the non-parametric …
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ATTRITION OR RETENTION? EXPLORING 4-YEAR AND 6-YEAR OUTCOMES AMONG NAVY ENLISTED SAILORS
… and Kaplan-Meier Survival curve analysis using Cox Proportional Hazard Model to identify predictors of Sailors’ attrition and retention behaviors. Results for 4-year attrition models show that women with either very high (college) or low (GED) educational attainment and Sailors in technical and …
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Modelling of risk factors, case-fatalities, survival and functional health status for stroke in Kelantan, Malaysia
… factors for in-hospital stroke fatalities. Using Cox proportional hazard regression, we found that the only two independent prognostic factors for stroke fatality in the hospitals were: a) stroke subtype and b) age. To further investigate the different prognostic effect of stroke subtype on …
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Optimal survival trees ensemble
… conditional inference forest, bagging and Cox proportional hazard model. In addition to improved predictive performance, the proposed method also reduces the number of survival trees in the ensemble as compared to the other tree based methods. Furthermore, the method is implemented in an …
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Empirical study on the motivations of bidders' second tender offer contests
… in subsequent acquisition activity. Finally, the Cox Proportional Hazard model is estimated to incorporate the time dimension. This model examines the probability of bidders becoming involved in a subsequent acquisition activity in the two years and the five years following their first tender …
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Disparities in Admission and Pediatric Emergency Outcomes by Race, Ethnicity, and Language.
… Generalized estimating equations (GEE) and Cox proportional hazard models were used to assess the association between REaL and patient outcomes. Results: 35,180 patient encounters were analyzed. White patients had significantly higher adjusted odds of hospital admission while Black patients …
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Geni modificatori della Beta talassemia e sviluppo di un algoritmo per la predizione della severità clinica
… phenotype. Subsequently we assessed, using Cox proportional hazard analysis on a training set, the effect of these loci on the age at which patients start regular transfusions. Finally we built a Thalassemia Severity Score and validated it on a testing set. Results Discriminatory power of …
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Depression and Death in Diabetes; 10-year follow up of all cause and cause specific mortality in a diabetic cohort
… in the Pathways Epidemiologic Study. Cox proportional hazard modeling was used to examine the relationships between depression status and mortality over a 10-year period Results: We found a significant, positive relationship between depression and all cause as well as …
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Valutazione del rischio genetico di comportamento suicidario nel disturbo bipolare: analisi di 737 pedigrees
… relatives (affected and unaffected). Cox proportional hazard regression models and logistic regression models were used to investigate the role of several clinical covariates on the risk of MAD, BD and suicidal behavior. Results: The lifetime prevalence of suicidal behavior (attempted …
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Levels and Determinants of age at first marriage in Namibia
… 2013. The study also used the Kaplan Meier and Cox proportional hazard regressions to explain the factors associated with age at first marriage for each survey year. Results revealed selection effects on age at marriage among women in the 15-24 age group. An increase in age, commencement in …
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Renal and Cardiovascular Outcomes Associated with Cannabis Use in Veterans with Advanced Chronic Kidney Disease Transitioning to Dialysis
… and cerebrovascular accident (CVA) events using Cox proportional hazard models. Finally, Chapter 4 presents our research on the association between UTOX groups and mortality using Cox proportional hazard models (mortality due to any reason) and Fine and Grey’s competing risk regression …
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On the use of utility billing information for predicting homelessness
… of homelessness; however, Logistic Regression, Cox Proportional Hazard, and the Cox Time Varying Covariates models found these variables to be useful in predicting homelessness. These models were evaluated for prediction using the method of K-Folds and the Cox Time Varying Covariates model was …
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Essays on Industrial Development
… to 2015. Employing Poisson regression and the Cox proportional hazard model, it finds that firm efficiency is critical for survival. Technological proficiency lowers exit rates, increases firm longevity, and enhances market retention. The study underscores the necessity of efficiency-driven …
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Diagnostic conversion following admission for a first-episode substance induced psychosis: A four-year retrospective cohort study
… four-year period. We used survival analysis and Cox-proportional hazard regression to determine factors associated with diagnostic conversion to a primary mental disorder. Results: Of the sample of 225 patients, the majority were young, male and polysubstance users. Diagnostic conversion occurred …
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Investment Strategies under Uncertainty: Theory and evidence of preemption in case of geographical market entrance
… models are tested empirically by applying the Cox proportional hazard model on entry behaviour of 61 retailers into 6 Eastern European countries from 1989 until 2005. The results explain why retailers entered certain markets earlier and why some firms succeeded more in seizing the entry …
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