Ebrahim Hajizadeh

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BACKGROUND Tobacco use among adolescents is a major public health concern, and identifying predictors of smoking is necessary for planning prevention programs. The present study examined the relationship between refusal self efficacy, self esteem, smoking refusal skills and water pipe (hookah) smoking among Iranian male adolescents. MATERIALS AND METHODS(More)
BACKGROUND AND PURPOSE Perinatal mental health problems have been studied in more than 90% of high income countries but this information is available only for 10% of low and middle income countries. A study on the relationship between anxiety during pregnancy and postpartum depression has not been performed in Iran. This prospective study aimed to(More)
BACKGROUND Colorectal cancer (CRC) is one of the most malignant cancers, but prognosis varies in different parts of the world. Knowing the prognostic factors of the cancer is clinically important for prognosis and treatment application objectives. However, evaluation of these factors overall does not provide thorough understanding of the cancer. Therefore,(More)
BACKGROUND This study carried out to develop a scale for assessing diabetic patients' perceptions about physical activity and to test its psychometric properties (The Physical Activity Questionnaire for Diabetic Patients-PAQ-DP). METHODS An item pool extracted from the Theory of Planned Behavior literature was generated. Then an expert panel evaluated the(More)
BACKGROUND Researchers in medical sciences often tend to prefer Cox semi-parametric instead of parametric models for survival analysis because of fewer assumptions but under certain circumstances, parametric models give more precise estimates. The objective of this study was to compare two survival regression methods - Cox regression and parametric models -(More)
It is imperative to understand the factors that influence clinical competency. Consequently, it is essential to study those that have an impact on the process of attaining clinical competency. A grounded theory approach was adopted for this study. Professional competency empowers nurses and enables them to fulfill their duties effectively. Internal and(More)
BACKGROUND Social support has proved to be one of the most effective factors on the success of diabetic self-care. This study aimed to develop a scale for evaluating social support for self-care in middle-aged patients (30-60 years old) with type II diabetes. METHODS This was a two-phase qualitative and quantitative study. The study was conducted during(More)
Background: Many attempts have done to improve cryopreservation of mammalian ovaries using simple, economical and efficient technique “vitrification”. Objective: The aim of the present study was to compare the mouse ovaries cryopreservation by direct cover vitrification (DCV) using different concentrations of ethylene glycol (EG) with conventional(More)
The feeder layer and the presence of specific growth factors are thought to induce the differentiation of embryonic stem cells (ESCs) in culture. The aim of this study was to evaluate the effect of erythropoietin (EPO) on the differentiation of ESCs into erythroid colonies in simple and co-culture systems. Embryoid bodies were dissociated and replated in(More)
Golestan province has a reputation for relatively high incidence rates of gastric cancer in Iran. Along with dietary, lifestyle and environmental influential factors, soil selenium and high levels of pesticide used may exert influence in this region. The present study was designed for modeling the influential predictors on incidence of gastric cancer in(More)