Navegando por Palavras-chave "multivariate analysis"
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- ItemAcesso aberto (Open Access)Different gender division patterns for swine housing in wean-to-finish system(Soc Brasil Engenharia Agricola, 2017) Massari, Juliana M.; Vercellino, Rimena do A.; Curi, Thayla M. R. de C.; de Moura, Daniella J.; Medeiros, Brenda Batista Lemos [UNIFESP]; Salgado, Douglas D'AlessandroThis study aimed at identifying the best gender division pattern for swine at nursery stage, through the evaluation of behavioral and environmental parameters. Three treatments were established to achieve our objective: single -sex housing of 26 surgically castrated male pigs
- ItemAcesso aberto (Open Access)Fatores de risco para câncer da pele não melanoma em Taubaté, SP: um estudo caso-controle(Associação Médica Brasileira, 2011-08-01) Ferreira, Flávia Regina; Nascimento, Luiz Fernando Costa; Rotta, Osmar [UNIFESP]; Universidade de Taubaté Departamento de Medicina; Hospital Universitário de Taubaté Serviço de Dermatologia; Universidade de São Paulo (USP); Universidade Federal de São Paulo (UNIFESP)OBJECTIVE: To identify factors associated with non-melanoma skin cancer in the city of Taubaté, São Paulo, Brazil. METHODS: Hospital-based case-control study with individuals residing in Taubaté, treated between January 2005 and December 2006. The subjects were matched 1:1 according to gender and age. Age, gender, phototype, European descent, time of residence, sun exposure, time (in years), number of hours and time of occupational and non-occupational sun exposure, photoprotection, family history and photodamage were independent variables. A hierarchical logistic regression was used at three levels. The model adjustment was performed using the Hosmer-Lemeshow test and its accuracy was verified by ROC curve. The significance level was p < 0.05. RESULTS: There were 132 cases and 132 controls. Phototype with OR = 3.14 (95% CI 1.79-5.49), hours of occupational 1.76 (1.04-2.99) and non-occupational sun exposure 1.80 (0.98-3.29) and family history 2.10 (1.13-3.93) were the variables in the final model. Hosmer-Lemeshow test, p = 0.97. Accuracy 70% (95% CI 63-76). CONCLUSION: We concluded that fair skin, family history and occupational and non-occupational sun exposure were associated with non-melanoma skin cancer in Taubaté-São Paulo.
- ItemSomente MetadadadosLiver retransplantation: A model for determining long-term survival(Lippincott Williams & Wilkins, 2006-04-15) Linhares, M. M.; Azoulay, D.; Matos, D.; Castelo, A.; Trivino, T.; Goldenberg, A.; Castaing, D.; Adam, R.; Delvart, V; Ichai, P.; Saliba, F.; Lemoine, A.; Samuel, D.; Bismuth, H.; Universidade Federal de São Paulo (UNIFESP); Hop Paul Brousse; Univ Paris SudBackground. Because of the worse results from retransplantation in relation to the initial liver transplantation, there is a need to refine the indication for retransplantation, such that fair distribution of this benefit is obtained.Methods. This was a Study of 139 patients who underwent liver retransplantation. Thirty variables were studied: 18 relating to the recipient and 12 to the donor. All the independent variables were initially compared with the length of survival using univariate analyses. Variables presenting significance were compared with the dependent variable of length of survival, to determine which factors were related to longer survival among patients, when evaluated together.Results. A multivariate model for determining long-term survival among patients with retransplants was built up using the following variables: recipient's age, creatinine, urgency of retransplantation and early failure of the first graft. Through this multivariate model it was possible to determine a score that was categorized according to tertile distributions (below the 33rd percentile, score < 24; 33rd to 66th percentile, 24 <= score <= 32; above the 66th percentile, score > 32). One-year, 3-year, and 5-year patient survival rates following retransplantation were respectively 85%, 82%, and 77% for scores < 24; 69%, 66%, and 61% for scores between 24 and 32; and 21%, 19%, and 16% for scores > 32 (P < 0.0001).Conclusion. the variables of recipient's age, creatinine, urgency of retransplantation, and early failure of the initial transplantation were factors that were independently related to the long-term survival of patients with liver retransplants.
- ItemSomente MetadadadosRisk factors for low bone mineral density in children and adolescents with inflammatory bowel disease(Springer, 2008-10-01) Caldas Lopes, Leticia Helena [UNIFESP]; Sdepanian, Vera Lucia [UNIFESP]; Szejnfeld, Vera Lucia [UNIFESP]; Morais, Mauro Batista de [UNIFESP]; Fagundes-Neto, Ulysses [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)Objective To evaluate bone mineral density of the lumbar spine in children and adolescents with inflammatory bowel disease, and to identify the clinical risk factors associated with low bone mineral density. Methods Bone mineral density of the lumbar spine was evaluated using dual-energy X-ray absorptiometry (DXA) in 40 patients with inflammatory bowel disease. Patients were 11.8 (SD = 4.1) years old and most of them were male (52.5%). Multiple linear regression analysis was performed to identify potential associations between bone mineral density Z-score and age, height-for-age Z-score, BMI Z-score, cumulative corticosteroid dose in milligrams and in milligrams per kilogram, disease duration, number of relapses, and calcium intake according to the dietary reference intake. Results Low bone mineral density (Z-score bellow -2) was observed in 25% of patients. Patients with Crohn's disease and ulcerative colitis had equivalent prevalence of low bone mineral density. Multiple linear regression models demonstrated that height-for-age Z-score, BMI Z-score, and cumulative corticosteroid dose in mg had independent effects on BMD, respectively, beta = 0.492 (P = 0.000), beta = 0.460 (P = 0.001), beta = -0.014 (P = 0.000), and these effects remained significant after adjustments for disease duration, respectively, beta = 0.489 (P = 0.013), beta = 0.467 (P = 0.001), and beta = -0.005 (P = 0.015). the model accounted for 54.6% of the variability of the BMD Z-score (adjusted R(2) = 0.546). Conclusions the prevalence of low bone mineral density in children and adolescents with inflammatory bowel disease is considerably high and independent risk factors associated with bone mineral density are corticosteroid cumulative dose in milligrams, height-for-age Z-score, and BMI Z-score.