نتایج جستجو برای: survival models

تعداد نتایج: 1214086  

Abdolrasoul Bardideh Amir Hossein Hashemian Behrouz Beiranvand, Eghbal Zand-Karimi Mansour Rezaei

Cox regression model serves as a statistical method for analyzing the survival data, which requires some options such as hazard proportionality. In recent decades, artificial neural network model has been increasingly applied to predict survival data. This research was conducted to compare Cox regression and artificial neural network models in prediction of kidney transplant survival. The prese...

Journal: :iranian red crescent medical journal 0
mr baneshi department of biostatistics and epidemiology, kerman university of medical sciences, iran +98-913- 4423948, [email protected]; department of biostatistics and epidemiology, kerman university of medical sciences, iran +98-913- 4423948, [email protected] ar talei department of surgery, shiraz university of medical sciences, iran f hashemi instructor of pediatric nursing group, nursing and midwifery college, shiraz university of medical sci-ences, iran +98-711-6473239, [email protected]; instructor of pediatric nursing group, nursing and midwifery college, shiraz university of medical sci-ences, iran +98-711-6473239, [email protected]

Journal: :iranian journal of cancer prevention 0
alireza abadi dept. of health and community medicine, school of medicine, shahid beheshti university of medical sciences, tehran, iran parvin yavari dept. of health and community medicine, school of medicine, shahid beheshti university of medical sciences, tehran, iran monireh dehghani dept. of biostatistics, paramedical sciences faculty, shahid beheshti university of medical sciences, tehran, iran hamid alavi majd dept. of biostatistics, paramedical sciences faculty, shahid beheshti university of medical sciences, tehran, iran erfan ghasemi shahid beheshti university of medical sciences, tehran, iran. farzaneh amanpour dept. of biostatistics, paramedical sciences faculty, shahid beheshti university of medical sciences, tehran, iran

background: the aim of this study is to evaluate the association between different treatments and survival time of breast cancer patients using either standard cox model or stratified cox model. methods: the study was conducted on 15830 women diagnosed with breast cancer in british columbia, canada.  they were divided into eight groups according to patients’ ages and stage of disease either cox...

Journal: :علوم دامی 0
مسلم ملاعبدالکریمی کارشناس ارشد اصلاح نژاد دام دانشگاه آزاد اسلامی واحد ورامین امیر رشیدی استاد، گروه علوم دامی دانشگاه کردستان قباد عسگری جعفرآبادی استادیار گروه علوم دامی دانشگاه آزاد اسلامی واحد ورامین

in this research, 6517 records, collected by khojir sheep breeding station (tehran, iran), during 1991 to 2011 were used to estimate genetic parameters of lamb survival in zandi sheep. genetic parameters were estimated using 16 different models of animal model, sire and threshold models using reml procedures. the aic criterion was used to evaluate the models. the effects in the most suitable an...

Abdolrasoul Bardideh Amir Hossein Hashemian Behrouz Beiranvand, Eghbal Zand-Karimi Mansour Rezaei

Cox regression model serves as a statistical method for analyzing the survival data, which requires some options such as hazard proportionality. In recent decades, artificial neural network model has been increasingly applied to predict survival data. This research was conducted to compare Cox regression and artificial neural network models in prediction of kidney transplant survival. The prese...

اسماعیلی, حبیب الله, بنکچی, حسین, دوستی, حسن, فرهنگی, حمید, فروزان‌نژاد, مریم,

Background and Objective: Acute lymphoblastic leukemia (ALL) is the most common malignancy in children, accounting for about a quarter of all malignancies. This study aimed to identify the prognosis of patients with relapsed acute lymphoblastic leukemia in Dr. Sheikh Hospital in Mashhad from 2006 to 2015 using competing risk models. Materials and Methods: Patients with ALL from March 2006 to...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده مهندسی 1387

abstract this paper discusses several commonly used models for strategic marketing¹ including market environmental analysis methods (i.e. swot and pest analysis) and strategic marketing tools and techniques (i.e. boston matrix and shell directional policy matrix)and shows how these models may help a firm to achieve its strategic goals. at first, the main reason for doing this research is de...

ژورنال: بیماری های پستان 2020
Ghasemi, Fahimeh, Haghighat, Shahpar, Olfatbakhsh, Asiyeh, Rasekhi, Ali-Akbar,

Introduction: Therapies for many of diseases, especially cancer, have been improved significantly in the recent years, resulting in an increase in the number of patients who do not experience mortality. Therefore, the application of cure models is more suitable for survival analysis in this population than the usual survival models are. The aim of this study was to estimate the recurrence-free ...

  Genetic parameters for birth weight and survival traits were estimated using data collected from 1995 to 2009 in Jafarabad Moghani Sheep Breeding Station. Number of observation for survival and birth weight were 7202 and 6585, respectively. Genetic parameters were estimated using restricted maximum likelihood (REML) procedure under 16 different models, including animal, threshold and sire mod...

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