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 32 for “"Cox proportional hazards regression"”.
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Evaluation of the Survival Effect for Various Treatment Modalities Among Stage II and III Rectal Cancer Patients in California, 1994-2009
… PreOP CRT with those receiving PostOP CRT. Cox proportional hazards regression was used to assess survival over 192 months in both study groups, adjusting for date of surgery, stage, age, gender, race/ethnicity, and socioeconomic status (SES).</p> <p><strong>Results: </strong>The Cox …
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A NOVEL MULTI-ETHNIC STROKE RISK PREDICTION MODEL
… and not specific to stroke risk. We have used a Cox proportional hazards regression approach to develop a 10-year stroke risk score in a contemporary multi-ethnic longitudinal cohort that addresses the limitations of the current risk models. This Multi-ethnic Stroke Score adjusts for …
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Comparative Effectiveness of Smoking Cessation Medications among Schizophrenic Smokers
… after cessation treatment. Multivariate logistic regression models were used to determine which cessation medication was more effective in quitting. For our second objective, we excluded our cohort who (1) were not prescribed atypical antipsychotics and (2) already had diagnosis of diabetes, …
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Incidence rate of fluoroquinolone resistant gram-negative rod bacteremia among allogeneic hematopoietic cell transplant patients during an era of levofloxacin prophylaxis
… days post-transplant were assessed using Poisson regression. Cox proportional hazards regression was used to compare 30-day mortality between patients with FQ-resistant and those with FQ-sensitive GNR bacteremia. <bold>Results:</bold> Of the 2306 patients included in this cohort, 283 (12.3%) had …
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Are clinical characteristics predictive of non-traumatic lower extremity amputation in a diabetic population?
… wound aetiology. The data were analysed using a Cox proportional hazards regression model in addition to collation of data from Microsoft Excel. RESULTS Over the study period there were 41 amputations in 291 limbs from 150 people. The only variable predictive of LEA using Cox multivariate …
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Trends and ethnic disparities in the incidence and outcome of stroke in Auckland, New Zealand over 20 years
… Trends in survival were assessed using Cox Proportional hazards regression modelling. Results: Overall trends in the incidence and event rates of stroke declined across the study period. These declines were significant in males and for the ages 65 to 74 years only. However, growing …
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The prognosis of tuberculosis in adults infected with Human Immunodeficiency Virus (HIV-1)
… the survival curves of these two groups. The Cox proportional hazards regression method was used to determine the risk of death associated with tuberculosis while adjusting for potential confounding variables (i.e. age, CD4+ count, history of an AIDS-defining illness, use of co-trimoxazole …
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Pattern Analysis of Response to Acute Fluoxetine Treatment in the Prediction of Relapse in Children and Adolescents
… risk for depressive relapse in young patients. Cox proportional hazards regression modeling showed continuation treatment and gender to be strong predictors, with the interaction of pattern X treatment falling just short of significance (p = .07). Overall results of this study suggest that …
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Understanding Cancer Treatment Delay and Survival
… with curative radiotherapy. Multivariable Cox proportional hazards regression was used to evaluate the independent association between the DTI and OS in both objectives. Results: Twenty-four consensus-based recommendations with accompanying elaborations were generated. Topics included …
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Association of Individual and Combined Metabolic Risk Factors with Cancer
… cancers were assessed by multivariable Cox proportional hazards regression models. Lastly, associations between MRFs and age at cancer onset were examined by multiple linear regression analyses, using the general linear model. Data were derived from the NHANES I Epidemiologic Follow-up …
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Hypogonadism, Testosterone Replacement Therapy and Risk of Depression in Middle Aged and Older Men in the US
… status. Separate conditional logistic regression models tested whether a) hypogonadism is associated with increased odds of incident depression and b) exposure to TRT in hypogonadal men is associated with reduced odds of incident depression. Cox proportional hazards regression analyses …
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Novel statistical modeling of sleep patterns in Drosophila melanogaster
… types of statistical models (multiple linear regression and Cox proportional hazards regression) paired with two different model selection methods (stepwise and lasso) to select a model that uses sleep features to predict lifespan. The framework also features a resampling and cross validation …
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Lifestyle Factors and Risk of Heart Failure: A Prospective Cohort Study
… to 74 years of age and free of HF at baseline. Cox proportional hazards regression models were used to estimate the associations of interest. Partial population attributable risk was calculated to estimate the proportion of new HF cases occurring in this population that hypothetically could have …
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An investigation into the progression of premarital fertility since the onset of Zimbabwe's fertility transition
… overall fertility trends between 1988 and 2015. Cox proportional-hazards regression and forest plot analyses were then used to explain changes in factors associated with the timing of premarital first births over the same period. Data quality assessments were carried out using the method of …
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Co-morbid cardiometabolic diseases among people living with HIV/AIDS in Cameroon
… comprised multinomial and binomial logistic regressions, causal mediation analysis, and Cox proportional hazards regression. Systematic reviews were conducted by searching multiple databases, pooling the prevalence rates of hypertension, T2D, and obesity using a random-effects meta-analysis. …
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Receipt of Cardiac Care Following Hospitalization for an Acute Myocardial Infarction for Individuals With a History of Depression or Schizophrenia
… to those without a mental disorder using Cox Proportional Hazards regression. Subgroup analyses were performed to evaluate the interaction between well-established confounders and the receipt of a cardiac intervention. Results: Persons with a history of depression were found to be more …
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Rifampicin-resistant tuberculosis in Botswana: barriers and risk factors influencing patient outcomes, case detection, and linkage to effective care and treatment
… qualitative interviews (2017). Data analyses (Cox proportional hazards regression, survival and hazards curves, logistic regression) were conducted to describe significant associations. A systematic review and meta-analysis was conducted. Thematic analysis was performed for qualitative …
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Pharmacokinetics, pharmacogenetics and optimisation of treatment with non-nucleoside reverse transcriptase inhibitors in HIV-infected African children
… of increased risk of nonsuppression using Cox proportional hazards regression models and likelihood profiling. Efavirenz PK was described by 2-compartment disposition model with 1st-order elimination and transit-compartment absorption and nevirapine by 1-compartment model with elimination …
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Fish consumption and dementia in older people: impacts and determinants
… were analysed in multivariate adjusted logistic regression and Cox proportional hazards regression models. In 2018, the focus group discussions that consisted of 12 older adults were conducted in the UK, and the qualitative data was analysed using thematic analysis. Results: The findings of these …
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The impact of assessment on repeat deliberate self-harm
… of 13,500 presentations during this period. Cox proportional hazards regression showed that compared to patients who had no assessment, the time between initial presentation and any further presentation for a self harm episode at one of the participating hospitals was significantly longer for …
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