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Indiana University-Purdue University Indianapolis (IUPUI) / Introduction: The prevalence of diabetes mellitus (DM) is rapidly increasing among the aging United States population. This poses a challenge to dental providers since DM and multiple oral conditions have been identified as comorbidities. Hypertension (HTN) is associated with more poorly controlled DM and has been identified as contributing to RCT tooth loss in prior studies. Links have also been established between DM and the survival rate of root canal treated teeth, however, previous research has focused on institutional settings despite the majority of RCT being performed in private dental practices. This study will use data from private dental practices to evaluate the survival rate of RCT teeth in patients with DM and HTN. Materials and Methods: This retrospective study evaluated the survival rate of endodontic treated teeth among patients with DM and HTN using National Dental PBRN Practice data. Electronic dental records from 42 private dental practices in the United States over a period of 15 years with a minimum 2-year follow-up comprising 11,532 root canal treated teeth were analyzed. Kaplan-Meier survival curves were used to demonstrate the effects of HTN and DM on RCT tooth survival and Cox proportional hazards survival analysis was used to evaluate the DM and HTN effects after accounting for age, gender, insurance, year of treatment, tooth type, and crown and filling placement as covariates. Results: Patients with HTN only had significantly lower risk of failure than patients with both HTN and DM (p=0.003). Patients with neither HTN nor DM had significantly lower risk of failure than patients with both HTN and DM (p=0.020). Patients with DM only did not have significantly different risk of failure than patients with both HTN and DM (p=0.223). Patients with DM only did not have significantly different risk of failure than patients with HTN only (p=0.361). Patients with neither HTN nor DM did not have significantly different risk of failure than patients with HTN only (p=0.121) or patients with DM only (p=0.800). Conclusions: Patients with both DM and HTN have an increased chance of root canal treated tooth failure while patients with only DM or only HTN do not. Evaluation of severity of DM may be more important in determining RCT failure and studies utilizing laboratory values should be considered for future research.

This paper presents an approach to model the risks associated with defaults, prepayments, and order returns in the context of unsecured consumer credits, specifically in buy-now-pay-later (BNPL) loans. The paper presents a Bayesian competing risk proportional hazard model to model the time to default, prepayment, and order return in BNPL loans. Model parameters are estimated using Markov chain Monte Carlo (MCMC) sampling techniques and Bayesian inference is developed using a unique dataset containing monthly performance data of fixed-duration interest-bearing consumer loans. / I denna rapport presenteras en metod för att modellera riskerna förknippade med fallissemang, förskottsbetalning, och returnering av order i osäkrade konsumentkrediter, mer specifikt i köp-nu-betala-senare (BNPL) krediter. Rapporten presenterar en Bayesiansk konkurrerande utfall-modell (competing risk) för att estimera tiden till fallissemang, förskottsbetalning och retur av order i BNPL-lån. Modellens parametrar estimeras med hjälp av Markov chain Monte Carlo (MCMC) metoder och Bayesiansk inferens uppnås med hjälp av ett unikt dataset med månatlig kassaflödesdata från räntebärande BNPL-lån.

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Approved for public release, distribution is unlimited / The purpose of this thesis is to firstly analyze the determinants on the survival of United States Marine Corps Officers, and secondly, to develop the methodology to optimize the accessions of prior and non-prior enlisted officers. Using data from the Marine Corps Officer Accession Career file (MCCOAC), the Cox Proportional Hazards Model is used to estimate the effects of officer characteristics on their survival as a commissioned officer in the USMC. A Markov model for career transition is combined with fiscal data to determine the optimum number of prior and non-prior enlisted officers under the constraints of force structure and budget. The findings indicate that prior enlisted officers have a better survival rate than their non-prior enlisted counterparts. Additionally, officers who are married, commissioned through MECEP, graduate in the top third of their TBS class, and are assigned to a combat support MOS have a better survival rate than officers who are unmarried, commissioned through USNA, graduate in the middle third of their TBS class, and are assigned to either combat or combat service support MOS. The findings also indicate that the optimum number of prior enlisted officer accessions may be considerably lower than recent trends and may differ across MOS. Based on the findings; it is recommended that prior enlisted officer accession figures be reviewed. / Major, Australian Army

Approved for public release, distribution is unlimited / This study analyzes the relationship between selection to major in the Marine Corps, and the survival of midgrade officers to the promotion point of major, by investigating the effects of billet assignments. Specifically, this study looks at the influence of the percentage of time spent in the Fleet Marine Forces (FMF), the percentage of time spent in primary military occupation (PMOS) billet assignments, and the effect of having served in combat, recruiting, security forces, joint, and drill field duties. Models were formulated using groundwork established in previous promotion, retention, and attrition studies. Assignment variables were then introduced to the models. To account for officers' choice for continued service vice forced attrition, the sample was restricted to officers who had attained five years of service. Probit regression was used to find the influence of career assignments on the probability of selection; Heckman's correction was used to control for self-selection bias; and, Cox proportionalhazard regression was used, utilizing the same assignment factors, to find the influence of assignments on the likelihood of attrition. The findings indicated that FMF and PMOS ratios above 60 percent had a negative effect on promotion and retention. Also indicated was that time spent outside the PMOS, in "B" billets, had a positive effect on retention. In a time of budgetary constraints, this information may provide assistance to personnel planners as an alternative to pecuniary measures used to maintain and shape the force. / Major, United States Marine Corps

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Submitted by Luis Guilherme Macena (guilhermelg2004@gmail.com) on 2013-04-08T16:55:05Z No. of bitstreams: 1 Laurinda Yoko Shinzato Higa_TESE.pdf: 1486069 bytes, checksum: f70375f751ecd6d4742cf70048bbdb2e (MD5) / Made available in DSpace on 2013-04-08T16:55:05Z (GMT). No. of bitstreams: 1 Laurinda Yoko Shinzato Higa_TESE.pdf: 1486069 bytes, checksum: f70375f751ecd6d4742cf70048bbdb2e (MD5) Previous issue date: 2011 / Fundação Oswaldo Cruz. Instituto Fernandes Figueira. Departamento de Ensino. Programa de Pós-Graduação em Saúde da Criança e da Mulher. Rio de Janeiro, RJ, Brasil / Introdução: A fibrose cística (FC) é uma doença genética, de transmissão autossômica recessiva, que compromete múltiplos órgãos, que apresenta curso crônico e progressivo sendo considerada potencialmente letal. Objetivos: Estimar a sobrevivência dos pacientes com FC e os fatores de risco associados à redução no tempo de sobrevivência. Métodos: Tratou-se de uma coorte aberta de casos diagnosticados entre 01/01/1990 e 10/10/2009 no Centro de Referência em FC do RJ, CRFC-RJ, Brasil na qual se analisou a sobrevivência global e fatores de risco associados com a sobrevida dos pacientes. O período de risco iniciou-se na idade ao diagnóstico e terminou na idade quando ocorreu o óbito por FC, a perda de seguimento ou o fim do estudo. Os fatores analisados foram: sexo, motivo da suspeita diagnóstica, genótipo, número de órgãos comprometidos, estado nutricional, colonização bacteriana, reposição enzimática e década do diagnóstico. As curvas de sobrevivência foram estimadas pelo método Kaplan- Meier, ajustadas para truncamento à esquerda e para dados censurados à direita. A seguir, as hazard ratios (HR) foram estimadas pelo modelo de Cox, utilizando o processo de contagem, tendo a idade como escala de tempo e avaliadas pelo teste de razão de verossimilhança, e os modelos comparados pela análise de resíduos. Resultados: A população (n=177) apresentou o predomínio do sexo feminino (56%) e a idade mediana ao diagnóstico foi 14 meses. A idade mediana de sobrevivência foi 20,8 anos. Após o diagnóstico 81% sobreviveram até cinco anos; 70% até 10 anos e 61% até 14,5 anos. O modelo explicou 19,9% dos efeitos e incluiu seis covariáveis: colonização por Pseudomonas aeruginosa, isolada e associada (HR = 10,30; IC95% = 2,41-43,97), por Staphylococcus aureus (HR=4,50; IC95% = 0,93-1,85), por outras bactérias (HR=3,38; IC95% = 0,92-1,32), sexo feminino (HR=1,95; IC95% = 0,96-3,96), estado nutricional ≤ p5 (HR=1,94; IC95% = 0,94-3,98) e diagnóstico na década de 1990 (HR=4,34; IC95% = 1,50-12,52). Conclusão: Este estudo de coorte de 177 pacientes com FC mostrou uma idade mediana de sobrevivência de 20,8 anos dos pacientes no CRFC-RJ. Foram confirmados os efeitos das covariáveis que, presentes ao diagnóstico, se associaram a maior mortalidade. A intervenção nestas covariáveis promoverá a recuperação nutricional, a erradicação da Pseudomonas aeruginosa ou o adiamento da colonização crônica, dessa forma aumentando a sobrevivência. / Introduction: Cystic Fibrosis (CF) is a rare genetic disease, of autossomal recessive transmission, with multiple organ involvement, progressive course and potentially lethal. Objective: To study the CF patients survival and to find the factors associated with. Methods: In an open cohort of cases diagnosed between 01/01/1990 and 10/10/2009 in a CF reference center in Rio de Janeiro, we analyzed global survival and risk factors associated with the survival of CF patients. The at-risk period started at the age of CF diagnosis and ended at age of death, loss of follow-up or end of the study. The factors analyzed were gender, presentation mode, genotype, number of involved organs, nutritional state, bacterial colonization, enzyme replacement and decade of diagnosis. Survival curves were estimated by Kaplan-Meier (KM) adjusted for left truncation and right censored data. Hazard ratios (HR) were estimated by Cox model using counting process approach with age as time scale and evaluated by likelihood ratio test. Model diagnostic was conducted by residuals analysis. Results: The majority of the population (n=177) was female (56%) and during the study the median age at diagnosis was 14 months. The median survival was of 20.8 years. After diagnosis, 81% survived up to 5 years, 70% up to 10 and 61% up to 14.5. The model explained 19.9% of the effects and included six covariates: Pseudomonas aeruginosa colonization, isolated or associated (HR = 10.30; 95%CI = 2.41-43.97), for Staphylococcus aureus (HR = 4.50; CI95% = 0.93-1.85), for other bacteria (HR = 3.38; CI95% = 0.92-1.32), for female gender (HR = 1.95; CI95% = 0.96-3.96), for nutritional state ≤ p5 (HR = 1.94; CI95% = 0.94-3.98), and for diagnostic decade (HR = 4.34; CI95% = 1.50-12.52). Conclusion: The strength of risk factors found at diagnosis was evident in the prognosis besides indicating that interventions may reduce morbidity by nutritional recovery and by Pseudomonas aeruginosa eradication thus increasing survival.

Background: Data on the impact of gender on mortality after radical cystectomy is conflicting. We investigated a large single center sample with long-term follow-up in order to determine the relationship between gender and outcome. Patients and Methods: A total of 1,184 consecutive patients who underwent radical cystectomy for high risk superficial or muscle-invasive urothelial or undifferentiated bladder cancer between 1993 and 2015 were stratified by gender. Demographic data was compared using Mann-Whitney U test, chi-square test, or Fisher exact test. Cox proportional hazard models were used for the analysis of competing risks and logit models were used for the prediction of the receipt of adjuvant cisplatin-based chemotherapy. Results: Female patients were older, healthier, less frequently current smokers and had more extravesical tumors. In the multivariate analyses, female gender was an independent predictor of (lower) non-bladder cancer (competing) mortality (hazards ratio [HR] 0.68, 95% CI 0.49–0.95, p = 0.0248) but no predictor of bladder cancer-specific mortality (HR in the full model 1.20, 95% CI 0.94–1.54, p = 0.15). Gender was no predictor of the receipt of adjuvant cisplatin-based chemotherapy. Conclusions: Female gender was associated with an increased risk of extravesical disease but was no independent predictor of bladder cancer-specific mortality. Anatomical differences might be a plausible explanation for these observations.