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 20 for “"Kaplan-Meier curves"”.
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Dollar Stores and Supermarket Survivability in Non-metropolitan US Communities
… of dollar stores surrounding grocery stores, Kaplan Meier curves and Cox proportional hazards models were used for survival analysis of grocery stores. The findings of the models used imply that the presence of dollar stores is not associated with increasing the likelihood of grocery store …
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Investigation of Infectious Disease Associations with Cognitive Impairment using Electronic Medical Records
… score matching before survival analysis. Kaplan–Meier curves and matched measures of association were then used to estimate infection-specific hazard ratios for cognitive decline given a five-year follow-up window. Across pathogens, we observed heterogeneous, infection-dependent elevation …
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Characteristics of a contemporary South African cohort of patients with advanced HIV disease and associated risk factors for mortality
… risk ratios, Cox proportional hazards models and Kaplan-Meier curves. Results: Between 19% and 28% of the larger cohort (n=72,102) were estimated to have advanced HIV disease at any point during the study period. Of these patients 20% were on treatment, 40% were disengaged from care and 40% were …
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Evaluation of prognostic risk factors at diagnosis and treatment outcomes in adult patients with early-stage hodgkin lymphoma in Cape Town, South Africa
… unfavourable (any unfavourable factors). Kaplan-Meier curves and log-rank tests were used to compare treatment outcomes between groups. The median age at diagnosis was 35 years and 50% of the patients were male. Most patients had stage II disease (86%) and were classified as unfavourable …
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Surgical Outcomes Following Pulmonary Metastasectomy in Iceland
… for comparison. Survival was analyzed using Kaplan-Meier curves, and prognostic factors were assessed using Cox regression. The average follow-up time was 5.7 years, with survival calculated from the date of the first pulmonary metastasectomy. Results: A total of 179 pulmonary …
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Impact of the new TNM Staging System (8th edition) on oral tongue cancers
… to the 8th edition of the TNM classification. Kaplan-Meier curves for overall and disease-specific survival were calculated. RESULTS According to the 7th edition, of the 161 patients, 102 were staged after surgery as pT1 (stage I) and 59 as pT2 (stage II). According to the 8th edition, 36 …
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Trends in clinical presentation and treatment outcomes in a South African TTP cohort
… files and Western Cape Blood Services records. Kaplan-Meier curves and log-rank tests were used to evaluate remission rates overall and, by HIV status and treatment group. Logistic regression models were used to identify predictors of remission and relapse. Results: 139 patients were included, …
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Clinical Parameters Are More Predictive of Mortality in Alcoholic Hepatitis than Histopathologic Severity
… MELD, and DF (p=0.034). Survival analysis by Kaplan-Meier curves and log-rank tests showed no significant correlation between AHHS and 90-day survival (p=0.09), while multiple clinical scoring systems accurately stratified prognosis (p<0.018 for all). Severe neutrophil infiltration on biopsy …
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Breastfeeding practices among women living with HIV who started antiretroviral therapy in pregnancy in Cape Town South Africa
… low risk, using the cox proportion hazard model, Kaplan-Meier curves and the log rank test. Breastfeeding practices were assessed through an administered questionnaire and the Edinburgh postnatal depression scale had been used to identify the risk of depression. All women in the PACART trial were …
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Time to surgery and thyroid cancer survival in the United States
… performed using the Cox- hazard ratio as well as Kaplan-Meier curves. RESULTS: Preliminary results detail the fact that delaying surgeries past 180 days for patients led to decreased survival over a course of 5, 10, and 15 years as was determined by the use of Kaplan Meyer curves and the Cox …
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Long-term outcomes of women treated for high-grade squamous intraepithelial lesions at a University Hospital colposcopy unit in South Africa. A 5-year retrospective cohort study
… who had persistent disease after treatment. Kaplan-Meier curves were used to represent the time from treatment to recurrence and from persistence to cure. Time-to-event methods were applied to determine factors associated with treatment to recurrence and persistence to cure. RESULTS: A total …
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Physical and biological characterisation of clinically relevant combined MRI-radiation exposures with conventional and nanoparticle contrast agents
… and radiomics features were evaluated using Kaplan-Meier Curves and Hazard Ratios to design a predictive model of overall survival for brain metastases patients treated with SRS. SPIONs were then tested in an in vivo mouse model with H460 xenograft tumours to detect any decrease in the rate …
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An event history analysis of socio-economic determinants of adult mortality in Namibia
… explanatory analysis was carried out using the Kaplan Meier curves, with the log rank test used to assess significance. Further geo-additive survival models were carried out using the Bayesian framework for joint modelling of fixed, non-linear and spatial frailties. The proposed Bayesian model …
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Interpreting transcriptional signatures and their relevance to disease biology, prognosis and treatment resistance in colorectal cancer
… Partek Genomics Suite software. Additionally, Kaplan-Meier curves were also employed for survival analysis and boxplots were used for determining the level of gene expression in different samples using the Prism software. Additionally, gene set enrichment analysis (GSEA) was …
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A retrospective audit of young patients diagnosed with cervical cancer over ten years at Groote Schuur Hospital, Cape Town between 1 January 2003 and 31 December 2012, and their outcome at five-year follow-up compared to women in the prior decade
… each decade were analysed and reviewed using Kaplan-Meier curves and univariate analyses. The study compared data using Log Rank tests and p-values. Findings : The two decade-groups under study showed no difference in trends of survival regarding age, treatment type and histology. Albeit small …
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Surguvant inflammation and metabolism in colorectal surgery
… were analysed using Mantel Cox log-rank test and Kaplan Meier curves generated. Inflammatory mediators driving these associations were characterised from pre-operative serum samples. Perioperative circulating cfDNA levels were measured at seven different times points (pre-operative and …
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Exploring the effect of peri-operative inflammation on systemic and local breast cancer biomarkers
… were analysed using Mantel Cox log-rank test and Kaplan–Meier curves generated. For all of the above analyses, statistical significance was observed at p <0.5. Results Blood samples were collected from 64 patient’s peri-operatively. There were 38 patients who had their systemic inflammatory …
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CARDIOVASCULAR CONSEQUENCES AFTER SPINAL CORD INJURY AND THE EFFECTS OF ELECTRICAL STIMULATION
… with an above median FRS (>1.36%) using Kaplan-Meier curves and log-rank test. The end point was defined as either a CVD event or CVD mortality. Across the 5-year period, 39 (19.5%) participants developed a CVD event, 10 of which were fatalities. The log-rank test demonstrated that …
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Ο ρόλος της τροποποιημένης μεγίστης θυμεκτομής στην έκβαση των ασθενών με βαρεία μυασθένεια
… με την παρουσία ή μη θυμώματος. Η μέθοδος Kaplan-Meier χρησιμοποιήθηκε για την εκτίμηση της επίπτωσης των υπό εκτίμηση προγνωστικών παραγόντων στην επίτευξη της πλήρους ύφεσης ενώ η Cox Regression ανάλυση αποτέλεσε το μοντέλο για την ανάλυση της ταυτόχρονης επίδρασης των υπό μελέτη …
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Human immunodeficiency virus type 1 diversity in patients initiating treatment in Northern South Africa
… study was summarized and presented as a table. Kaplan Meier curves were used to estimate viral suppression and immunological response. Hazard ratios for demographic, socioeconomic, and clinical data against the two outcome variables namely viral suppression and immunological response were …