Showing 4 results for Zali
Ma Pourhoseingholi, E Hajizadeh, A Abadi, A Safaee, B Moghimi Dehkordi, Mr Zali,
Volume 3, Issue 1 (21 2007)
Abstract
Background & Objectives: Although Cox regression is commonly used to detect relationships between patient survival and demographic/clinical variables, there are situations where parametric models can yield more accurate results. The objective of this study was to compare two survival regression methods, namely Cox regression and parametric models, in patients with gastric carcinoma registered at Taleghani Hospital, Tehran.
Methods: Using data from 746 patients who had received care at Taleghani Hospital from February 2003 through January 2007, we compared survival rates between different patient groups with both parametric methods and Cox regression models. The former group included Weibull, exponential and log-normal regression we used the Akaike Information Criterion (AIC) and standardized parameter estimates to compare the efficiency of various models. All the analyses were performed with the SAS software and the level of significance was set at P< 0.05.
Results: The results showed a significantly higher chance of survival in the following subgroups: those with age at diagnosis < 35 years, lower tumor size and those without metastases (P< 0.05). According to AIC, Cox and exponentials model are similar in multivariate analysis but in univariate analysis parametric models are more efficient than Cox, except in the case of tumor size. Log-normal appears to be the best model.
Conclusions: Cox and exponential models have similar performance in multivariate analysis. However, it seems that there is no single model that performs substantially better than others in univariate analysis. The data strongly supported the log-normal regression among parametric models it can give more precise results and can be used as an alternative for Cox in survival analysis of patients with gastric cancer.
Gh Yadegarfar, T Alinia, R Hassannezhad, M Fayaz, R Hosseini, J Sanati, J Harandi, V Haj Noroozali, Mr Baghi, E Mirzavand,
Volume 8, Issue 3 (17 2012)
Abstract
Background & Objectives: To be able to measure the extent of job stress, it is essential to use a standardized tool based on a standard theoretical model. The study aims to test the psychometric properties and criterion validity of the Farsi version of the Effort Reward Imbalance (F-ERI) questionnaire.
Methods: The Farsi version of the ERI Questionnaire was distributed to 227 male employees in Isfahan Polyacryle Company. Internal consistency, reliability, discriminative validity, and factorial structure were evaluated.
The relationship between scales and depression was measured assessed by using logistic regression to criterion validity. Data were analysed by SPSS 18 and LIZREL 8.5.
Results: Mean score of effort, reward, and overcommitment were 10.7, 41.4, and 14.2 respectively Cronbach’s alpha coefficients were 0.61, 0.85 and 0.67 and split-half coefficients were 0.53, 0.85, and 0.65. All of item-total correlations were more than 0.20 correlation between each item and its scale were more than 0.4 except for one item. Effort and overcommitement had a good fit for construct validity.
Conclusion: Current study results indicated the Farsiversion of the Effort Reward Imbalance (F-ERI) questionnaire is a reliable and valid tool to measure psychosocial stress at work among Farsi-speaking employees. It is advisable to evaluate the tool in longitudinal studies and other industries which included female employees. We refer the investigators to see the longitudinal results of current project which is under publication.
K Etemad, A Heidari, K Nadafi, Mh Panahi, E Ahmadnejad, Sh Malekafzali, M Najmi, E Idani, H Amiri, Z Khorami, N Rajaee Behbahani , F Davoodi, S Taravatmanesh, A Malekifar, M Nejatifar, M Lotfi,
Volume 12, Issue 1 (Vol 12, No.1 2016)
Abstract
Background and Objectives: Ahvaz has become one of the most polluted cities in the world. Only on 11 November 2013, over one thousand residents in Khuzestan Province attended the nearest health center with severe symptoms, particularly shortness of breath, cough, wheezing, and high blood pressure. During a week, more than 7 thousand patients were registered with this syndrome. This study was conducted to investigate the evidence for the confirmation of an epidemic in acute respiratory syndrome among the residents of Ahwaz in November 2013.
Methods: In this cross-sectional study, we evaluated the data of the use of drugs related to acute respiratory attacks from November 2008 to 2013 in Ahvaz. Then, we conducted a descriptive study on the general population. The sample size was 120 and the study participants included different segments of the general population. The data collection tool was a researcher-made questionnaire and the data were analyzed using SPSS.18.
Results: The use of the respiratory drugs increased from 2008 to 2013. The drug consumption was markedly higher in November 2013. In the study of the general population, 93% of the participants declared that they had never seen a similar event, and 92.5% mentioned that they had never heard of a similar occurrence.
Conclusion: Due to the significant increase in respiratory medicine in November 2013 and the unexpected nature of the event, an epidemic seems to be obvious.
Hamid Soori, Nahid Khodakarami, Alireza Zali, Alireza Noori, Samaneh Akbarpour, Fatemeh Sadat Asgarian,
Volume 18, Issue 3 (Vol.18, No.3, Autumn 2022)
Abstract
Background and Objectives: COVID-19 pandemic caused a lot of severe problems in the world. This study investigated the epidemiology of the disease in Tehran in the first quarter of the epidemic's beginning.
Methods: The available information recorded for patients from 20 February 2020 to 20 May 2020 in Tehran was used. To prepare disease-related distribution maps, the addresses of patients' residences in Google Earth were called to ARC-GIS version 10-4. The methods used in GIS include IDW, Hotspot and also software development.
Results: Overall, 3699 individuals whose PCR results were positive in Tehran were included in the study. Out of the total number of them, 550 people died and the fatality rate of the disease in hospitalized patients was 14.9%. One thousand five hundred thirty patients (41.4%) have recovered, and the remaining 1619 patients were under treatment until data collection. Of the total, 1479 confirmed cases were women (40%). The average age was 57.4 years (SD=16.5). The density of cases in areas 4, 8 and 13, and the existence of some cluster diseases in neighborhoods such as Tehran Pars, Ayat and Pirouzi streets are noteworthy points.
Conclusion: The trend of the COVID-19 epidemic is dire and requires long-term measures. Nevertheless, to control this disease, the health system, the policy of isolating patients and suspicious people, wear masks especially in densely populated areas, are the most important controlling factors.
