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1.
Public Health ; 186: 44-51, 2020 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-32768623

RESUMO

BACKGROUND: Self-harm-related death is one of the most unfortunate, tragic, and regrettable types of death owing to injuries with a variety of socio-economic and cultural causes. The study aimed to determine the trend in the mortality of self-harm by sex and age at national and provincial levels in Iran over a period of 26 years. METHODS: The Iran Death Registration System (DRS), cemetery databanks in Tehran and Esfahan, and the national population and housing censuses of Iran were used for this study. Using a growth model, the population was estimated in the age groups. Incompleteness, misalignment, and misclassification in the DRS were all considered and addressed accordingly. We used a spatio-temporal and Gaussian process regression model to estimate mortality rates in children and adults. RESULTS: Over the study period, 67,670 deaths were estimated owing to self-harm across the country. The overall age-standardized mortality rate decreased from 4.32 per 100,000 (95% unit interface (UI): 3.25-5.75) to 2.78 (2.15-3.59) per 100,000 between 1990 and 2015, a reduction of approximately 35.65%. The M/F ratio was 2.03:1 with an annual percent change of -2.38% and -1.37% for women and men, respectively. The annual self-harm mortality rate was higher among individuals aged 15-24 years, as well as it was more in men during the study period. CONCLUSION: Mortality from self-harm has declined over the study period in Iran. Higher rates in men and in population aged 15-24 years, with considerable variation by province, were the distinguishing features of self-harm. Iran needs to improve monitoring through a comprehensive multisectoral strategy; and most importantly, provide timely, effective and low-cost preventive interventions.


Assuntos
Comportamento Autodestrutivo/mortalidade , Adolescente , Adulto , Fatores Etários , Idoso , Idoso de 80 Anos ou mais , Censos , Criança , Bases de Dados Factuais , Feminino , Humanos , Irã (Geográfico)/epidemiologia , Masculino , Pessoa de Meia-Idade , Mortalidade/tendências , Comportamento Autodestrutivo/epidemiologia , Fatores Sexuais , Fatores de Tempo , Adulto Jovem
2.
Public Health ; 170: 78-88, 2019 May.
Artigo em Inglês | MEDLINE | ID: mdl-30978579

RESUMO

OBJECTIVES: Comprehensive and up-to-date data on fatal injury trends are critical to identify challenges and plan priority setting. This study provides a comprehensive assessment of poisoning mortality trends across Iran. STUDY DESIGN: The data were gathered from various resources, including death registration systems, cemetery databases of Tehran and Esfahan, the Demographic and Health Survey of 2000, and three rounds of national population and housing censuses. METHODS: After addressing incompleteness for child and adult death data separately and using a spatio-temporal model and Gaussian process regression, the level and trend of child and adult mortality were estimated. For estimating cause-specific mortality, the cause fraction was calculated and applied to the level and trend of death. RESULTS: From 1990 to 2015, 40,586 deaths due to poisoning were estimated across the country. The poisoning-related age-standardized death rate per 100,000 was estimated to have changed from 3.08 (95% uncertainty interval [UI]: 2.32-4.11) in 1990 to 0.96 (95% UI: 0.73-1.25) in 2015, and the male/female ratio was 1.35 during 25 years of study with an annual percentage change of -5.4% and -4.0% for women and men, respectively. The annual mortality rate was higher among children younger than 5 years and the elderly population (≥70 years) in the study period. CONCLUSIONS: This study showed that mortality from poisoning declined in Iran over the period from 1990 to 2015 and varied by province. Understanding the reasons for the differences of poisoning mortality by province will help in developing and implementing measures to reduce this burden in Iran.


Assuntos
Intoxicação/mortalidade , Adolescente , Adulto , Idoso , Criança , Pré-Escolar , Bases de Dados Factuais , Feminino , Inquéritos Epidemiológicos , Humanos , Lactente , Irã (Geográfico)/epidemiologia , Masculino , Pessoa de Meia-Idade , Mortalidade/tendências , Adulto Jovem
3.
J Dent Res ; 97(13): 1452-1459, 2018 12.
Artigo em Inglês | MEDLINE | ID: mdl-30067915

RESUMO

The utilization of rat models in cariology research has made substantial contributions to decipher mechanisms of caries formation and to develop preventive treatments. The existing rat models still have potential for improvement toward establishing a more accurate standard caries protocol to utilize in testing and/or developing new dental technologies. The current caries-scoring methods rely on optical microscopy-based techniques, which necessitates formation of highly advanced lesions. Moreover, models that facilitate the implementation of cariogenic bacteria by shifting the balance of oral flora through desalivation and/or antibiotic treatment create a nonnatural environment. Furthermore, there is a paucity of detailed structural and mechanical characterization on the resulting carious lesions. The purpose of this study was to develop a rat model that induces formation of mild carious lesions and to provide comprehensive structural and mechanical characterization. With this aim in mind, an in vivo model promoting progression of mild lesions was established with specific pathogen-free Sprague-Dawley rats. Cariogenic bacteria, Streptococcus mutans, was implemented into the oral flora without the use of antibiotics or desalivation surgery. During caries formation, progression of the infection was monitored by quantifying the relative abundance of S. mutans in oral flora with quantitative real-time polymerase chain reaction. A significant increase in colonization efficacy of S. mutans was detected during cariogenic challenge ( P < 0.01). The resulting carious lesions were analyzed by conventional light optical and scanning electron microscopy. A detailed structural and morphological characterization on fissure caries with different degrees of severity was provided. The changes in the morphology and demineralization state of the sound and carious tissues were quantified by energy-dispersive X-ray spectroscopy, and local mechanical properties were acquired with nanoindentation. The principles laid out in this work can be utilized in cariology research and developed into a standard protocol for future studies.


Assuntos
Cárie Dentária/microbiologia , Modelos Animais de Doenças , Animais , Fenômenos Biomecânicos , Progressão da Doença , Nanotecnologia , Ratos , Ratos Sprague-Dawley , Reação em Cadeia da Polimerase em Tempo Real , Espectrometria por Raios X , Streptococcus mutans/patogenicidade
4.
Neuroscience ; 322: 377-97, 2016 May 13.
Artigo em Inglês | MEDLINE | ID: mdl-26917272

RESUMO

Despite the vast improvements of cell therapy in spinal cord injury treatment, no optimum protocol has been developed for application of neural stem/progenitor cells. In this regard, the present meta-analysis showed that the efficacy of the neural stem/progenitor cell (NSPC) transplantation depends mainly on injury model, intervention phase, transplanted cell count, immunosuppressive use, and probably stem cell source. Improved functional recovery post NSPC transplantation was found to be higher in transection and contusion models. Moreover, NSPC transplantation in acute phase of spinal injury was found to have better functional recovery. Higher doses (>3×10(6)cell/kg) were also shown to be optimum for transplantation, but immunosuppressive agent administration negatively affected the motor function recovery. Scaffold use in NSPC transplantation could also effectively raise functional recovery.


Assuntos
Células-Tronco Neurais/transplante , Traumatismos da Medula Espinal/terapia , Transplante de Células-Tronco/métodos , Animais , Humanos , Imunossupressores/farmacologia , Imunossupressores/uso terapêutico , Células-Tronco Neurais/citologia , Células-Tronco Neurais/fisiologia , Dor/fisiopatologia , Traumatismos da Medula Espinal/fisiopatologia
5.
Spinal Cord ; 54(8): 579-83, 2016 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-26690856

RESUMO

STUDY DESIGN: This is a Delphi study. OBJECTIVES: Defining variables that potentially influence the outcomes of an animal study regarding pathophysiology of traumatic spinal cord injury (TSCI). SETTING: This study was conducted in Iran. METHODS: A modified two-round Delphi study was conducted. As the first round, an initial questionnaire was developed on the basis of literature and a series of focus group discussions. In the second round, the participants were asked to score the items through a 10-point scale. Consensus was achieved through the following criteria: (1) the median of scores has to be at 7.5 or higher, and (2) at least 70% of participants need to rate 7 or higher. Also, the inter-rater reliability analysis was performed to determine consistency among raters using the Kappa coefficient and Cronbach's alpha. RESULTS: Twenty-one experts participated in our study. From the first round of the study, a 47-item checklist was developed. By considering the aforementioned criteria for consensus building on extremely important factors, we reached a 15-item checklist including species, strain, method and level of injury, control group, genetic background, severity of injury, attrition, use of appropriate test, blindness, method of allocation to treatments, regulation and ethics, age/weight, bladder expression, number of animals/group and statistics. The inter-rater reliability for the raters was found to be Kappa=0.82 (P<0.001). A Cronbach's alpha of 0.9 for all the questions indicated high internal consistency. CONCLUSION: This study introduces a checklist of variables that potentially influence the outcomes of animal studies regarding TSCI pathophysiology and describe its validity and reliability.


Assuntos
Modelos Animais de Doenças , Traumatismos da Medula Espinal/diagnóstico , Traumatismos da Medula Espinal/fisiopatologia , Índices de Gravidade do Trauma , Animais , Lista de Checagem , Técnica Delphi , Feminino , Humanos , Masculino , Reprodutibilidade dos Testes , Especificidade da Espécie , Inquéritos e Questionários
6.
Cell Death Differ ; 22(5): 875-84, 2015 May.
Artigo em Inglês | MEDLINE | ID: mdl-25394489

RESUMO

The tumor suppressor phosphatase and tensin homolog (PTEN) dephosphorylates PIP3 and antagonizes the prosurvival PI3K-Akt pathway. Targeted deletion of PTEN in mice led to early embryonic lethality. To elucidate its role in embryonic epithelial morphogenesis and the underlying mechanisms, we used embryonic stem cell-derived embryoid body (EB), an epithelial cyst structurally similar to the periimplantation embryo. PTEN is upregulated during EB morphogenesis in parallel with apoptosis of core cells, which mediates EB cavitation. Genetic ablation of PTEN causes Akt overactivation, apoptosis resistance and cavitation blockade. However, rescue experiments using mutant PTEN and pharmacological inhibition of Akt suggest that the phosphatase activity of PTEN and Akt are not involved in apoptosis-mediated cavitation. Instead, hypoxia-induced upregulation of Bnip3, a proapoptotic BH3-only protein, mediates PTEN-dependent apoptosis and cavitation. PTEN inactivation inhibits hypoxia- and reactive oxygen species-induced Bnip3 elevation. Overexpression of Bnip3 in PTEN-null EBs rescues apoptosis of the core cells. Mechanistically, suppression of Bnip3 following PTEN loss is likely due to reduction of hypoxia-inducible factor-2α (HIF-2α) because forced expression of an oxygen-stable HIF-2α mutant rescues Bnip3 expression and apoptosis. Lastly, we show that HIF-2α is upregulated by PTEN at both transcriptional and posttranscriptional levels. Ablation of prolyl hydroxylase domain-containing protein 2 (PHD2) in normal EBs or inhibition of PHD activities in PTEN-null EBs stabilizes HIF-2α and induces Bnip3 and caspase-3 activation. Altogether, these results suggest that PTEN is required for apoptosis-mediated cavitation during epithelial morphogenesis by regulating the expression of HIF-2α and Bnip3.


Assuntos
Apoptose/fisiologia , Embrião de Mamíferos/embriologia , Epitélio/embriologia , Regulação da Expressão Gênica no Desenvolvimento/fisiologia , Proteínas de Membrana/biossíntese , Proteínas Mitocondriais/biossíntese , PTEN Fosfo-Hidrolase/metabolismo , Fatores de Transcrição/metabolismo , Regulação para Cima/fisiologia , Animais , Embrião de Mamíferos/citologia , Proteínas de Membrana/genética , Camundongos , Camundongos Knockout , Proteínas Mitocondriais/genética , PTEN Fosfo-Hidrolase/genética , Proteínas Proto-Oncogênicas c-akt/genética , Proteínas Proto-Oncogênicas c-akt/metabolismo , Fatores de Transcrição/genética
7.
Ir J Med Sci ; 184(2): 277-84, 2015 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-24626962

RESUMO

BACKGROUND: Gastric cancer is the fourth most common cancer worldwide. This reason motivated us to investigate and introduce gastric cancer risk factors utilizing statistical methods. AIM: The aim of this study was to identify the most important factors influencing the mortality of patients who suffer from gastric cancer disease and to introduce a classification approach according to decision tree model for predicting the probability of mortality from this disease. METHODS: Data on 216 patients with gastric cancer, who were registered in Taleghani hospital in Tehran,Iran, were analyzed. At first, patients were divided into two groups: the dead and alive. Then, to fit decision tree model to our data, we randomly selected 20% of dataset to the test sample and remaining dataset considered as the training sample. Finally, the validity of the model examined with sensitivity, specificity, diagnosis accuracy and the area under the receiver operating characteristic curve. The CART version 6.0 and SPSS version 19.0 softwares were used for the analysis of the data. RESULTS: Diabetes, ethnicity, tobacco, tumor size, surgery, pathologic stage, age at diagnosis, exposure to chemical weapons and alcohol consumption were determined as effective factors on mortality of gastric cancer. The sensitivity, specificity and accuracy of decision tree were 0.72, 0.75 and 0.74 respectively. CONCLUSIONS: The indices of sensitivity, specificity and accuracy represented that the decision tree model has acceptable accuracy to prediction the probability of mortality in gastric cancer patients. So a simple decision tree consisted of factors affecting on mortality of gastric cancer may help clinicians as a reliable and practical tool to predict the probability of mortality in these patients.


Assuntos
Árvores de Decisões , Modelos Teóricos , Neoplasias Gástricas/mortalidade , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Irã (Geográfico)/epidemiologia , Masculino , Pessoa de Meia-Idade , Probabilidade , Curva ROC , Estudos Retrospectivos , Fatores de Risco , Neoplasias Gástricas/classificação , Adulto Jovem
10.
Spinal Cord ; 50(12): 899-903, 2012 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-22777490

RESUMO

STUDY DESIGN: Cross-sectional observational study. OBJECTIVES: To examine variables associated with the development of pressure ulcers in subjects with spinal cord injury (SCI). SETTING: SCI patients under coverage of the State Welfare Organization of Iran. METHODS: Mobile rehabilitation teams gathered data from 20 of the 30 provinces in Iran. There were 8104 SCI patients registered in the database; 7489 patients were included in the analysis. The prevalence of PU in patients aged <10 years was lower than those aged >10; therefore, we used different logistic models for these groups. Likewise, separate models were created for patients who had experienced SCI during the past year versus patients injured >1 year before the evaluation. RESULTS: PU was present in 34.6% of the patients. The variables associated with PU in patients aged <10 years were female gender and the time passed since SCI. In patients aged >11 years, male gender, the time passed since SCI, lower level of education, lack of an intimate partner, quadriplegia and older age presented a significant association with PU. Patients for whom <1 year has passed since SCI, male gender, quadriplegia and older age were associated with PU. And patients for whom >1 year had passed since SCI, male gender, quadriplegia, older age, lower level of education and lack of an intimate partner were associated with PU. CONCLUSION: SCI patients are a heterogeneous group and the risk factors associated with PU may vary in specific subgroups. Different models are needed to describe PU in SCI patients depending on the patient's age and the time passed since SCI.


Assuntos
Úlcera por Pressão/etiologia , Traumatismos da Medula Espinal/complicações , Adolescente , Adulto , Fatores Etários , Criança , Escolaridade , Feminino , Humanos , Irã (Geográfico)/epidemiologia , Modelos Logísticos , Masculino , Pessoa de Meia-Idade , Análise Multivariada , Úlcera por Pressão/epidemiologia , Úlcera por Pressão/patologia , Quadriplegia/epidemiologia , Fatores de Risco , Traumatismos da Medula Espinal/epidemiologia , Traumatismos da Medula Espinal/patologia , Adulto Jovem
11.
Public Health ; 126(1): 40-6, 2012 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-22137095

RESUMO

OBJECTIVE: To examine the incidence and risk factors of firework-related injuries during the Last Wednesday Eve Festival in Tehran, Iran, with a focus on the association of socio-economic status and educational level with the use of fireworks and the incidence of firework-related injury. STUDY DESIGN: Cross-sectional household survey. METHODS: Using a random cluster sampling approach, a household survey was conducted in Greater Tehran in April 2008. During a structured interview with an adult member of the household, questions were asked about the use of fireworks and any firework-related injuries sustained by household members during the preceding festival. Data were gathered on expenditure on fireworks, medical treatment of firework-related injuries, length of hospital stay for the treatment of these injuries, and damage to personal property by fireworks. RESULTS: The survey included 2456 households in Greater Tehran. At least one member of 18% of these households had used fireworks during the Last Wednesday Eve Festival in 2008. The overall incidence of firework-related injuries was 100 per 100,000 population (95% confidence interval 37-163). The use of fireworks was less common among parents and more common among male children. Individuals who used fireworks were younger than non-users. Younger age and use of fireworks were associated with firework-related injuries (P < 0.05). The mean household expenditure on fireworks was US$1.62. Among the households that had bought fireworks, the mean expenditure was US$9.40 (standard deviation US$16.34). Thirty-two households (1.3%) reported damage to personal property due to fireworks during the festival costing US$3.30-167.20. The regional price of housing in the study area was correlated with the educational level of the head of the household. Higher educational level of the head of the household was associated with participation in firework activities by household members, expenditure on fireworks, and the amount of financial loss due to fireworks (all P < 0.05). CONCLUSION: Fireworks are associated with serious injuries, and impose a non-trivial financial burden on families. While personal use of fireworks was an independent risk factor for firework-related injuries, higher socio-economic status of the household and higher educational level of the head of the household were not protective factors.


Assuntos
Traumatismos por Explosões/epidemiologia , Efeitos Psicossociais da Doença , Escolaridade , Explosões/estatística & dados numéricos , Adolescente , Adulto , Traumatismos por Explosões/economia , Criança , Pré-Escolar , Análise por Conglomerados , Estudos Transversais , Explosões/economia , Características da Família , Feminino , Férias e Feriados , Humanos , Incidência , Lactente , Recém-Nascido , Irã (Geográfico)/epidemiologia , Masculino , Fatores de Risco , Classe Social , Adulto Jovem
12.
Public Health ; 125(10): 727-33, 2011 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-21906762

RESUMO

OBJECTIVES: There are few reports on epidemiological patterns of injury and injury-related mortality in developing countries. This study aimed to report the epidemiology of injuries and poisonings in emergency departments in Iran. STUDY DESIGN: Retrospective study using available data from 20 March 2005 to 19 March 2008. METHODS: Recorded Injury Surveillance System (ISS) data including demographics, place of residence, type of injury, and outcome during emergency department stay were extracted from the databank of the national ISS and included in the final analysis. RESULTS: In total, 2,991,624 emergency department admissions due to injury were recorded at university hospitals during the study period. According to the national census in 2006, Iran had a population of 70,472,846, so the injury admission rate to university hospital emergency departments was 1.4%/year in Iran. The mean age of the patients was 26.5 [standard deviation (SD) 16.9] years, and 72.7% of the cases were male. The most common cause of injury was road traffic accidents (RTAs) (31.9%), followed by hit (25.5%) and falls (10.9%). Intoxication was associated with 5.3% of all injuries. The overall emergency department mortality rate was 0.6%. Of those who died, the mean age was 32.6 (SD 21.1) years. All fatal injuries, except burn injuries, were more common in males. Intoxication-related deaths occurred in 3.8% of cases. In patients aged <13, 13-65 and >65 years, hit (28.2%), RTAs (34%) and RTAs (27.9%) were, respectively, the most common causes of injury. In all age groups, RTAs were the most common cause of death. CONCLUSIONS: This study determined the epidemiology of injuries and poisonings in emergency departments in Iran. The mortality rate in this study was low in comparison with other research, which may be explained in the context of inappropriate prehospital or interhospital care in Iran. This finding can be employed to formulate targeted preventive strategies based on the incidence of the more common types of injury.


Assuntos
Intoxicação/mortalidade , Vigilância da População , Ferimentos e Lesões/mortalidade , Acidentes de Trânsito/estatística & dados numéricos , Adolescente , Adulto , Criança , Serviço Hospitalar de Emergência/estatística & dados numéricos , Feminino , Humanos , Irã (Geográfico)/epidemiologia , Masculino , Pessoa de Meia-Idade , Admissão do Paciente/estatística & dados numéricos , Estudos Retrospectivos
13.
Swiss Med Wkly ; 141: w13239, 2011.
Artigo em Inglês | MEDLINE | ID: mdl-21805410

RESUMO

BACKGROUND: Evaluating the effects of a commercially available synbiotic preparation (contains both prebiotic and probiotic elements) on functional constipation in males. METHODS: In a randomised controlled trial, a total of 66 adult men with functional constipation were equally allocated to receive a synbiotic mixture or a placebo. The synbiotic mixture or placebo was given as capsules with the same shape and colour, and patients received the capsules twice a day for 4 weeks. RESULTS: A total of 60 patients (31 in the synbiotic group) completed the study. At baseline evaluation, there was no significant difference between the mean stool frequency per week in synbiotic and placebo groups [mean difference of 0.11 times (95% CI: -0.31-0.55), p = 0.58]. However, mean stool frequency increased significantly at weeks 2 [mean difference of 1.32 times (95% CI: 0.21-2.43)] and 4 [mean difference of 1.58 times (95% CI: 0.18-2.99)] in the synbiotic group compared with the placebo group (p = 0.02). A significant difference (p = 0.006) was found at weeks 2 [mean difference of 0.83 (95% CI: 0.20-1.45)] and 4 [mean difference of 0.91 (95% CI: 0.3-1.51)] between the synbiotic and placebo groups regarding the Bristol stool form score. No adverse effect was seen in the synbiotic group. CONCLUSION: The results of this study indicated that this specific commercial product seemed to be effective in increasing stool frequency and improving consistency in this sample of males with functional constipation. However, further studies with longer follow ups, and including females and elderly patients are required to confirm the efficacy of this product for treatment of functional constipation.


Assuntos
Doenças Funcionais do Colo/terapia , Constipação Intestinal/terapia , Defecação/fisiologia , Simbióticos , Adulto , Apetite , Constipação Intestinal/fisiopatologia , Fezes , Humanos , Irã (Geográfico) , Masculino , Inquéritos e Questionários , Resultado do Tratamento , Adulto Jovem
14.
Pak J Biol Sci ; 12(14): 1019-24, 2009 Jul 15.
Artigo em Inglês | MEDLINE | ID: mdl-19947180

RESUMO

This study was aimed to evaluate the association of serum homocysteine with peripheral atherosclerosis and deep vein thrombosis in an Iranian population complaining from vascular symptoms in lower limbs referred to a university general hospital in the capital of Iran. The study design was case-control. Deep vein thrombosis and atherosclerosis groups were, respectively consisted of 25 patients presenting with signs and symptoms of deep vein thrombosis whom disease was confirmed by duplex ultrasonography and 25 patients presenting with signs and symptoms of chronic arterial insufficiency who were candidate for arterial reconstruction whom disease was confirmed by angiography. The control group was consisted of 25 persons selected among relatives accompanying the traumatic patients admitted in the general surgery ward of the same hospital. The age of atherosclerosis, DVT and control group were 61 +/- 14, 47 +/- 16 and 40 +/- 14, respectively. The serum level of homocysteine was higher in males (p < 0.01) except for atherosclerotic patients. The prevalence of high homocysteine was 15% (control), 36% (DVT) and 56% (atherosclerosis) among females and 75% (control), 73% (DVT) and 56% (atherosclerosis) among males. The serum homocysteine in the control group which was representative of Tehran population who do not take vitamin B supplements was unexpectedly high. It seems that fortification of popular foodstuffs should be considered for Tehran. The association between homocysteine and atherosclerosis and deep vein thrombosis was not confirmed in this study especially for men who had higher serum homocysteine than women. It is possible that this association fades away in populations with high prevalence of hyperhomocysteinema.


Assuntos
Aterosclerose/sangue , Homocisteína/sangue , Trombose Venosa/sangue , Adulto , Aterosclerose/diagnóstico por imagem , Estudos de Casos e Controles , Feminino , Humanos , Irã (Geográfico) , Masculino , Pessoa de Meia-Idade , Ultrassonografia Doppler Dupla , Trombose Venosa/diagnóstico por imagem
16.
Transplant Proc ; 39(4): 930-1, 2007 May.
Artigo em Inglês | MEDLINE | ID: mdl-17524853

RESUMO

INTRODUCTION: The terms entropy and robustness are currently used by biomedical investigators to predict the risk of change in a system. The former is the mathematical identification of uncertainty about a system, while the latter is the likelihood of system stability. We conducted an entropy-based analysis of our renal transplantation data set. MATERIALS AND METHODS: The input variables in our model included donors and recipients, past medical history, and other clinical data. The output variables were 6- month, 1-year, and 2- year patient and graft survivals. Data-entropy analysis was performed with Ontonix s.r.l. software (www.ontonix.com). RESULTS: The total input and output entropy was 13.14 and 1.54, respectively. The mean input and output robustness was 39.14% and 29.54%. The robustness amplification index was 0.75. The minimum entropy of the input variables was reported for a history of myocardial infarction (0.07), vascular disease (0.1), bladder residual (0.13), or urologic surgery (0.15). The minimum entropy of the output variables was 0.20 for 6-month patient survival; 0.22 for 1-year patient survival; 0.25 for 6-month graft survival; 0.27 for 1-year graft survival; 0.28 for 2-year patient survival; and 0.32 for 2-year graft survival. CONCLUSION: Data-entropy analysis demonstrated a high stability of our transplantation data set. Nevertheless, long-term outcomes, especially those of graft survival, were slightly more unpredictable.


Assuntos
Transplante de Rim/estatística & dados numéricos , Biometria , Bases de Dados Factuais , Entropia , Humanos
17.
Transplant Proc ; 39(4): 966-9, 2007 May.
Artigo em Inglês | MEDLINE | ID: mdl-17524864

RESUMO

INTRODUCTION: Although there are reports that link diabetes-induced end-stage renal disease (ESRD) with several post renal transplantation complications and conditions, few studies have directly focused on this issue. This study compared the pattern of rehospitalizations after renal transplantation among diabetic versus nondiabetic ESRD patients, measuring causes, length of stay, outcomes and costs. METHODS: We retrospectively reviewed 366 randomly selected rehospitalization records of kidney transplant recipients between 1994 and 2006, including 69 who underwent renal transplantation due to diabetic nephropathy and 297, due to nondiabetic ESRD. We compared the two groups with respect to demographic and clinical variables: donor source, readmission pattern, rehospitalization cause, time interval between transplantation and hospitalization (T-H time), length of hospital stay (LOS), and intensive care unit (ICU) admission, hospital charges, and inpatient outcomes of graft loss and mortality. RESULTS: The diabetes group, compared with nondiabetic group, had a greater mean age (53 +/- SD vs. 39 +/- SD years), proportion of admissions due to infections (44.9% vs. 32%) or renal dysfunction (14.5% vs. 29.6%), mean hospital charges ($5056 vs. $3046), and hospital mortality (18% vs. 4.3%; P<.05). Diabetic patients were readmitted sooner after transplantation than nondiabetic patients (11 vs. 18 months; P<.05). There was no difference between the groups with regard to gender, donor source, LOS, ICU admission, and graft loss. CONCLUSION: The etiology of ESRD should be considered for scheduling post renal transplantation follow-up. Renal transplant recipients with diabetes-induced ESRD need further attention in follow-up programs.


Assuntos
Efeitos Psicossociais da Doença , Nefropatias Diabéticas/complicações , Falência Renal Crônica/etiologia , Falência Renal Crônica/cirurgia , Transplante de Rim/estatística & dados numéricos , Readmissão do Paciente/estatística & dados numéricos , Adulto , Feminino , Mortalidade Hospitalar , Humanos , Falência Renal Crônica/mortalidade , Transplante de Rim/mortalidade , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Fatores Socioeconômicos
18.
Transplant Proc ; 39(4): 974-7, 2007 May.
Artigo em Inglês | MEDLINE | ID: mdl-17524866

RESUMO

INTRODUCTION: Despite a sizeable amount of research conducted hitherto into predictors of renal transplantation outcomes, there are scarce, data on predictors of in-hospital outcomes of post-kidney transplant rehospitalization. This study sought to provide a user-friendly prediction model for inpatient mortality and graft loss among rehospitalized kidney recipients. METHOD: This retrospective review of 424 consecutive kidney recipients rehospitalized after kidney transplantation between the years 2000 and 2005 used multiple logistic regression analysis to evaluate predictors of hospitalization outcomes. RESULTS: Multivariate analysis showed that age at admission, diabetes mellitus as the cause of end-stage renal disease (ESRD), admission due to cerebrovascular accident (CVA), surgical complications were predictors of in-hospital death; age at transplantation, surgical complications, and rejection were predictors of graft loss. Equation for prediction of in-hospital death was Logit(death) -0.304 * age at transplantation (year) + 0.284 age at admission (year) + 1.621 admission for surgical complication + 4.001 admission for CVA-ischemic heart disease + 2.312 diabetes as cause of ESRD. Equation for prediction of in-hospital death was Logit(graft loss) = 0.041 age at transplantation (year) + 1.184 admission for graft rejection + 1.798 admission for surgical complication. CONCLUSIONS: Our prediction equations, using simple demographic and clinical variables, estimated the probability of inpatient mortality and graft loss among re-hospitalized kidney recipients.


Assuntos
Sobrevivência de Enxerto/fisiologia , Mortalidade Hospitalar , Pacientes Internados/estatística & dados numéricos , Transplante de Rim/fisiologia , Readmissão do Paciente/estatística & dados numéricos , Adulto , Feminino , Humanos , Irã (Geográfico) , Transplante de Rim/mortalidade , Tempo de Internação , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Análise de Sobrevida
19.
Transplant Proc ; 39(4): 981-3, 2007 May.
Artigo em Inglês | MEDLINE | ID: mdl-17524868

RESUMO

INTRODUCTION: We sought to account for changes in posttransplant hospitalization patterns in terms of the changes in demographic and transplantation-related variables. METHODS AND MATERIALS: We retrospectively analyzed 1860 cases of kidney transplantation performed between 1992 and 2004 in terms of demographic and transplantation-related variables. Of the 1860 cases, rehospitalization records in the first year posttransplantation were available for 1152 cases, which were assessed for causes of admission, mortality, graft loss, length of stay, and hospital charges. RESULTS: The pattern of rehospitalizations showed the following trends: (1) Increased rate of infection; (2) Decreased rate of graft rejection; and (3) Peak costs of rehospitalization between 1999 and 2000. CONCLUSION: We believed that the increased infection rate and decreased rejection rate may have been related at least partly to the shift in the treatment protocol from azathioprine-based to mycophenolate mofetil regimens in 2000. Furthermore, the peak in the relative frequency of diabetes mellitus and hypertension as the etiology of end-stage renal disease among those having undergone transplantation between 1999 and 2000 may have been responsible for the peak in rehospitalization costs and length of hospital stay. We are strongly of the opinion that hospital statistics are a valuable tool for health care policymakers to monitor transplantation outcomes.


Assuntos
Hospitalização/estatística & dados numéricos , Transplante de Rim/fisiologia , Readmissão do Paciente/estatística & dados numéricos , Adulto , Bases de Dados Factuais , Feminino , Seguimentos , Humanos , Infecções/epidemiologia , Masculino , Pessoa de Meia-Idade , Monitorização Fisiológica , Complicações Pós-Operatórias/epidemiologia , Estudos Retrospectivos , Fatores de Tempo
20.
Transplant Proc ; 39(4): 1054-6, 2007 May.
Artigo em Inglês | MEDLINE | ID: mdl-17524890

RESUMO

INTRODUCTION: Diverticulosis is a common finding in autosomal-dominant polycystic kidney disease (ADPKD). To avoid the serious complications of diverticulosis after kidney transplantation, some policies have recommended aggressive actions, such as elective colectomy. These policies are not widely agreed upon. This controversy led us to investigate the serious complications and the outcome of diverticulosis in ADPKD kidney recipients to see whether such therapies are justified. MATERIALS AND METHODS: From 2002 to 2006, we followed 18 ADPKD kidney recipient patients with barium enema-documented diverticulosis. All subjects were asymptomatic for diverticulosis at the time of transplantation. The mean value +/- SD of follow-up duration was 25.4 +/- 28.5 months. We documented demographic data, familial history of ADPKD, barium enema findings, and complications as well as graft and patient survivals. RESULTS: Hepatic flexure was the most prevalent site for diverticula. The mean (SD) of diverticular count was 6 +/- 5.1. Patients with a familial history of ADPKD showed a higher number of diverticular (P=.01). Diverticulitis occurred in three patients, all of whom died. CONCLUSION: Diverticulitis is a fatal and not rare complication in ADPKD patients. The rate of complications in our study was similar to previous findings, but we observed serious complications even among patients asymptomatic at the time of transplantation. The decision to take aggressive action such as elective colectomy is still a matter of debate that needs further evaluation.


Assuntos
Divertículo/complicações , Transplante de Rim/fisiologia , Rim Policístico Autossômico Dominante/cirurgia , Adulto , Divertículo/genética , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Rim Policístico Autossômico Dominante/complicações , Estudos Retrospectivos , Resultado do Tratamento
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