Showing 5 results for Asadi
M Baniasadi , Gh.r Babaie , H Zeraati , F Memari ,
Volume 4, Issue 1 (2 2006)
Abstract
Background and Aim: The purpose of this study was to assess the accuracy of the bootstrap method in logistic regression and to explore the method's use in logistic regression models in cases where the sample size is insufficient.
Materials and Methods: We use data from 150 patients who had undergone surgery at the Cancer Institute, Emam Khomeini hospital during from 1999 to 2001. Then we drew repeated samples of size 50 from these 150 patients.
Results: Applying ordinary logistic regression, an appropriate model we fitted to the initial data. Then confidence intervals and standard errors were computed for all regression coefficients.
There are many situations where the sample size is insufficient and conditions for using ordinary logistic regression are not met. In these cases the use of the bootstrap method not only produces more accurate estimations of regression coefficients, but with repeated sampling, produces estimates very close to the true values. This holds for the estimation of regression coefficients, confidence intervals and standard errors of coefficients.
Conclusion: In this study we show the optimal number of replications and the optimal sample size when using the bootstrap method in studies involving relatively small sample sizes.
Aziz Kassani, Mahmoud Reza Gohari, Mir Taher Mousavi, Mohsen Asadilari,
Volume 10, Issue 2 (24 2012)
Abstract
Background and Aim: Social capital composed of networks, norms and values, which facilitates cooperation within and between groups to achieve mutual benefits and common goals. Social capital increases the benefits of investing in physical and human capital. In a society that favors more social capital, collaboration is easier. This study investigates the validity and reliability of a social capital tool, which had been administered through a large population-based survey using factor analysis.
Materials and Methods: Data were obtained from Urban Health Equity Assessment and Response Tool (Urban HEART-1) survey in Tehran. Factor analysis is a method of discovering structural position of variables to reduce them into a limited number of components which are more fundamental. The reliability of the questionnaire and main components of the tool were investigated through factor analysis.
Results: According to factor analysis, three main components of social capital including, individual trust, cohesion/ social support and social trust/associative relations, were recognized. These three components explained 66.14% of total variance of the social capital tool. Also, overall Cronbach's alpha coefficient was 0.88 which indicates high reliability of the questionnaire.
Conclusion: Social capital tool, which was administered in Urban HEART project, covers the main components of social capital framework with high reliability and validity, which is suitable to be used in other population-based surveys.
Akram Bani Asadi, Soudabeh Vatankhah, Agha Fatemeh Hosseini,
Volume 11, Issue 1 (8-2013)
Abstract
Background and Aim: Quality measurement and management has changed to be one of the most important topics in health care today. This study aims to analyze service quality through Importance-performance Analysis tool in selected hospitals.
Materials and Methods : This is an Analytical-descriptive study. Research community was all admitted patients to four hospitals during a specific period, the sample of the study consists of 284 inpatient person selected by stratified random sampling method. The main instrument was a questionnaire consists of two parts "importance" and "performance" with the same items in 8 dimensions. Assigning the scores for each of those service items in a two-dimensional diagram with four cell, each gives special guideline for hospitals. SPSS 17.0 for windows was employed for the scale measurement.
Results: The results of the study indicate that the most important dimensions in patients attribute with 3.55 mean were for "accountability" and the best performance in patients point of view was for "responsiveness" and "reliability". The key dissatisfier with least importance and performance score was for "service organization" with the mean of 3.11.
In analyzing service quality, reliability, empathy, assurance and accountability dimensions were located in Cell I, service process was located in Cell II, service organization was located in Cell III and finally tangibles and responsiveness dimensions were located in Cell IV.
Conclusion: Application of IPA to these data showed that developing service process management system in order to improve process of service delivering is important directions for hospitals to work on.
Zahra Nikoo Seresht, Shahnaz Rimaz, Mohsen Asadi Lari, Saharnaz Nedjat, Effat Merghati Khoie, Seyed Abbas Motevallian, Narges Saeepour,
Volume 11, Issue 3 (1-2014)
Abstract
Background and Aim: Quality of life amongst people living with HIV/AIDS is affected by their experiences such as social isolation, stigmatization and discrimination. Physical, mental and social problems are common throughout their lives. Therefore, studying the quality of life of HIV-infected individuals are shortcomings in various cultural contexts. The purpose of this study was to assess the quality of life of people living with HIV/AIDS in Iran.
Materials and Methods: A cross-sectional study design was used. We used convenience sampling to recruit 300 HIV-infected adults attending the Imam Khomeini Hospital consultation center for clients with risky behaviors in Tehran. To collect the data we employed the World Health Organization Quality of life for HIV Brief version (WHOQOL-HIV BREF). T-test, one-way ANOVA, Pearson’s coefficient and multiple regression were used for analysis.
Results: The mean ±SD age of the respondents was 34.3±7.5 years. The majority of them were males (55%) and asymptomatic (51.7%). Among the domains of quality of life, Level of independence had the highest score (13.4±3.1), and environment (12.5±2.8) and psychological (12.5±3.1) domains had the lowest. Younger's, women and employed subjects reported better quality of life for different domains of quality of life (p<0.05).
Conclusion: Psychological and environment domains in quality of life were found to be adversely affected by HIV. Accurate and culturally sensitive interventions are suggested to address the patients' psychological and environmental needs.
Samaneh Asadi, Faezeh Fazeli,
Volume 18, Issue 1 (5-2020)
Abstract
Background and Aim: Healthy food and nutrition have always been a serious concern of human beings. In this regard, food safety is extremely important. As an example, nitrates in foods may affect their safety. The purpose of this study was to investigate the nitrate contents of highly consumed food products (potatoes, tomatoes and onions) on sale in wholesale fruit and vegetable markets (Heravi, Mellat and Lavizan) in District 4 of Tehran, Iran.
Materials and Methods: Samples of the foods were collected in winter and spring, and their nitrate content was measured spectrophotometrically. The SPSS-20 software was used for data analysis.
Results: The results showed that there was a statistically significant difference between the vegetables nitrate contents in winter and spring. The nitrate content of onions in the spring in the Heravi market and that of potatoes in the winter in the Lavizan market were higher than the respective standard, while that of tomatoes was less than the standard in both seasons.
Conclusion: The nitrate content in the samples was in most cases below the respective standard, indicating that the vegetables on sale in the wholesale markets in Tehran were acceptable as regards nitrate content (at least in spring and winter).
