نتایج جستجو برای: survival models
تعداد نتایج: 1214086 فیلتر نتایج به سال:
The objective of this study was to evaluate non-genetic factors affecting longevity and survival of Guilan sheep from birth to yearling. Longevity and survival records of 41037 lambs born from 496 rams and 10256 ewes of Guilan sheep were analyzed using linear and Weibull models. Results indicated that the overall mean of longevity was 1260.84 days. The fixed effects of flock, dam age, sex, year...
Background and Purpose: Gastric cancer is the third leading cause of mortality in Iran after cardiovascular diseases and accidents. The aim of the present study was to assess survival and it’s affecting factors in gastric cancer patients through using Cox and parametric models along with frailty. Materials and Methods: In this study, the medical records of gastric cancer patients treat...
Vicia genus has 45 species in Iran. Many protective and biological activities have been reported from these species. In spite of many works, nothing is known about protective effect of V. cracca against hypoxia conditions. In this study, protective effects of V. cracca extract against hypoxia-induced lethality in mice were evaluated by three experimental models of hypoxia, asphyctic, haem...
Background and purpose: Hypoxia occurs especially in heart diseases and could lead to death. Compounds with antioxidant activity could display antihypoxic property. Sambucus ebulus (SE) and Myrtus communis (Myrtle) are well known plants with distinctive antioxidant activities. To the best of our knowledge there are no reports on their antihypoxic activities. Materials and methods: Protective e...
Background: Identification of the factors influencing short term and long term survival for patients is one of the important concerns in medical society. With determining the risk factors and also health factors of a disease, valuable information can be obtained. In some cases, such as high rate of censoring, the use of standard survival models for analysis may cause to loss in some of...
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