Papers by mohsen askarishahi
Journal of Mazandaran University of Medical Sciences, Jun 15, 2014
Background and purpose: One of the major complications of diabetes is retinopathy which is a high... more Background and purpose: One of the major complications of diabetes is retinopathy which is a highly specific vascular complication of type I and II diabetes. This study aimed at investigating the factors influencing the diagnosis of retinopathy in patients with type II diabetes using Cox, parametric, exponential, weibull, Log normal, and Log-logistic models and comparing their functions Material and Methods: This prospective cohort study included 400 patients with type II diabetes without retinopathy who were registered at Yazd Diabetes Research Center in 2008. They were followed up for diagnosis of retinopathy until February 2013. Significant variables in the univariate model for investigating the effective factors on diagnosis of retinopathy were entered in Cox multivariate and parametric models. The criterion to compare the performance of models was Akaike information criterion. Data was then analyzed in R software and 0.05 was considered as the significance level. Results: The mean and median periods to diagnose retinopathy were 46 and 58 months. Among the patients 3% were diagnosed with retinopathy in less than one year and in 16% the diagnosis was made in less than two years Conclusion: Some variables including anemia, taking aspirin, duration of diabetes, and using insulin were amongst the main risk factors for diagnosis of retinopathy (P<0.05). According to Akaike information criterion we found that Cox model best fits for determining factors influencing the diagnosis of retinopathy.
Tehran University Medical Journal TUMS Publications, Feb 15, 2011
Background: Diabetes is a chronic non-communicable disease with increasing prevalence. Retinopath... more Background: Diabetes is a chronic non-communicable disease with increasing prevalence. Retinopathy is one of the main complications of diabetes. Early diagnosis and treatment of retinopathy can reduce the risk of low vision and blindness. The aim of this study was to apply regression analysis of current status data to determine risk factors of diabetic retinopathy in patients with type 2 diabetes being referred to the Ophthalmology Clinic of Yazd Diabetes Research Center, Iran. Methods: In this analytical-observational study, 459 patients with type 2 diabetes were enrolled in the study and the ophthalmic examinations done by an ophthalmologist included visual acuity, intraocular pressure (IOP) measurement and slit-lamp examination. After pupil dilatation, funduscopy was done and the patients were classified according to ETDRS criteria. A proportional hazard model for current status data was used to identify the risk factors for retinopathy. Results: The hazard rate of having retinopathy increased by 5% for an increase of one year in the duration of diabetes (p Conclusion: This study showed that a history of hypertension may reduce the risks of diabetic retinopathy. In patients with the early diagnosis of diabetes, regular examination of the fundus, blood sugar control and tight control of high blood pressure are recommended.
DOAJ (DOAJ: Directory of Open Access Journals), Sep 1, 2014
Introduction:Cadmium is a heavy metal with high toxicity and is best known as a carcinogen elemen... more Introduction:Cadmium is a heavy metal with high toxicity and is best known as a carcinogen element. For protecting human health and environment it is necessary to remove excess Cadmium from industrial wastewater before discharging it to surface and ground water. In this study the efficiency of Zinc Oxides Nanoparticles in Cadmium removal from aqueous solution was evaluated. Methods: This is a laboratory experimental study. Adsorption tests were performed in a batch reactor in a laboratory scale using zinc oxide nanoparticles and the effect of initial cadmium concentrations, adsorbent dose, pH, and contact time on the removal efficiency was studied. Theresidual cadmium concentration in the solutionwas determined using flame atomic absorption spectroscopy Varian AA20 made in Australia. Finally for designing graphs, we used Excel software. Results:The results indicated that the adsorption process is affected by different parameters such as initial pollutant concentrations, adsorbent dose, pH, and contact time and Cadmiumremoval efficiency increases with increasing adsorbent dose and reaction time and decreases with increasing initial concentration of Cadmium. Therefore, it is observed that by raising the initial Cadmium concentration, the adsorption rate increases. The maximum efficiency of adsorptionin pH=7amounted to 89.6%. Conclusion:It is concluded that Zinc Oxide nanoparticles have proper efficiency in removal of Cadmium from aqueous solutions and can be used in the treatment of wastewater that contains ion Cadmium.However, its efficiency is deeply dependent on ion strength and the interaction of other metals in wastewater.
Tolooebehdasht, Jan 10, 2018
DOAJ (DOAJ: Directory of Open Access Journals), Nov 1, 2015
Introduction: Life quality is regarded as one of the important concepts in diabetic mellitus as a... more Introduction: Life quality is regarded as one of the important concepts in diabetic mellitus as a chronic disease, which produces extensive effects on the social and individual performance. Regarding the short-term and long-term complications as well as expensive costs of this disease, the present study aimed to determine the life quality of these patients compared to non-diabetic people and ultimately, a structural model was presented. methods: This analytical study was carried out on 250 diabetic and 250 non-diabetic patients in Yazd. The standard life quality questionnaire (whoqol-bref) was utilized as the data collection tool containing a total of 26 questions and 4 domains of physical health, mental health, social health and environmental health. The study data were analyzed using SPSS software (ver.16) and Amos(21). Results: The study results demonstrated a significant difference between life quality of diabetic patients and healthy subjects (p<0.001), and the mean score of all the different domains of questionnaire proved to be lower in patients than healthy subjects. Path coefficients in the structural equation model proved to be significant (p<0.001). The path coefficient between the environmental and social health with the mental health was 0.62 and 0.76 respectively., and, it was reported 0.96 between the physical health and mental health Eighty-six percent of changes of the physical health variable was explained by the mental health variable and 96% of changes of the mental health variable was explained by the social and environmental health. Conclusion: The study findings revealed diabetes as a chronic disease that can severely affect the patients' life quality. Every type of attempt in structural models of predicting physical health and life quality plays a meaningful role in alleviating these patients' problems.
Journal of Occupational Health and Epidemiology
Background: Determining the mortality rate of diseases in a community is one of the main componen... more Background: Determining the mortality rate of diseases in a community is one of the main components in health care planning of that community. This study used a join point regression model to determine the trend of mortality due to diabetes mellitus (DM) in Iran. Materials and Methods: The data on the rate of mortality due to DM were obtained from the reports of the Iranian Ministry of Health. The variation in the trend of mortality due to DM over the past eight years was analyzed using the join point regression model. For the evaluation of the regression parameters, the permutation test and least square method were applied. Data analysis was performed using the JOINPOINT statistical software. Results: The number of deaths due to DM has increased from 3047 cases per 100,000 people in 2003 to 5838 cases per 100,000 in 2010. A variation point was observed in 2007 with a P-value of 0.06 and 4500 permutations. The annual percentage change (APC) of the rate of mortality due to DM for the first period (2003-2007) was 6.6% with a confidence interval of-3-17.2 and for the second period (2007-2010) was 1.8% with a confidence interval of-12.4-18.2. APC was 4.6% in men with the confidence interval of 2.4-6.9 and 4.5% in women with the confidence interval of 2-7. Conclusions: The rate of mortality due to DM in Iran has increased during this 8-year period. The rate of mortality due to DM increased with a steep slope from 2003 to 2007 and with a gentle slope from 2007 to 2010.
Nitrate ion in drinking water has been found to have a significant effect against health human. N... more Nitrate ion in drinking water has been found to have a significant effect against health human. Nitrate is an acute toxic; it can be reduced to nitrite in the stomach when it can lead to have blue baby diseases in infants. This research is directed towards to elucidate the nitrate removal efficiency by kernel ashes of olive in water supply. Methods: This experimental study was conducted in a batch laboratory scale. The batch flow experiments for nitrate removal were undertaken to investigate the effects of the different parameters such as: initial concentrations of nitrate solution (50, 100, 150 mg/l), initial pH (3,5,7,9), detention time (15,30,60,120,180 min), and weight of adsorbent(.04, .06. .08 gr). Nitrate concentrations were measured by standard method using a spectrophotometer at two wavelengths 220 and 275 nm. Results: The Results obtained showed that the removal efficiency increases when the time and adsorbent dose is increased. By decreasing of pH value and the initial concentration of nitrate, the removal efficiency would be increased significantly. Investigation of the effect of nitrate initial concentration showed that increasing initial concentration of nitrate from 50 to 150 mg/l and without changing absorbent dose would lead to decrease in the absorption efficiency from 88% to 48% but the absorption capacity (qe) increased from 8.31 to 14.3. Moreover the maximum absorption took Place at 60 min of the first reaction. Conclusion: Nitrate removal by olive kernel ashes are considered as effective and appropriate method compared with other absorbents and the process is more efficient at acidic pH.
DOAJ (DOAJ: Directory of Open Access Journals), Nov 1, 2016
Introduction: One of the most complications of diabetes, diabetic retinopathy which is one of the... more Introduction: One of the most complications of diabetes, diabetic retinopathy which is one of the leading causes of visual loss and causes blindness of more than 10000 people annually. The purpose of this study was to determine the effective factors on Retinopathy recognition in patients with type 2 diabetes. Methods: In this prospective cohort study, 400 patients with type 2 diabetes without retinopathy which had referred to the Ophthalmology Clinic of Yazd Diabetes Research Center, Iran in 2008 were enrolled in the study and they were examined from Retinopathy until Feb 2013. For identification of effective factors on retinopathy recognition we used semi-parametric Cox model and parametric models, exponential, Weibull, Log-normal and Log-logistic. Results: The use of aspirin 0.6 times (in Weibull model, Log-normal) and one times (in Cox model) increases the retinopathy recognition risk. In other words, it decreases the duration of retinopathy recognition in these persons. In this study the risk of recognition of diabetic retinopathy in the patients who had anemia is 1.4 times of patients which didn ' t have these risk factors. Having anemia causes diabetic retinopathy recognition earlier. In this study it was observed that insulin caused a delay in the diagnosis of retinopathy and reduces the risk of diabetic retinopathy. Conclusion: Blood sugar control, regular examination of the funds by an ophthalmologist in the early diagnosis of diabetes, control of aspirin use, diagnosis and treatment of anemia in patients with type 2 diabetes are recommended.
J Babol Univ Med Sci; 22; 2020; PP: 318-325 Received: Oct 31 2019, Revised: Jan 5 2020, Accepted:... more J Babol Univ Med Sci; 22; 2020; PP: 318-325 Received: Oct 31 2019, Revised: Jan 5 2020, Accepted: Feb 29 2020. ABSTRACT BACKGROUND AND OBJECTIVE: Understanding the status and trend of changes in mortality due to road accidents over time is an important step for health policy making in order to reduce mortality. The aim of this study was to investigate the trend of deaths due to road accidents in Iran. METHODS: In this cross-sectional study, the trend of deaths due to road accidents in Iran between: 2006-2017 were examined including the number of annual deaths by gender and province, population each year, using the sites of the Forensic Medicine Organization and the Statistics Center of Iran. The Bayesian approach connection point regression analysis method was used to analyze the data. Data analysis was performed using R3.5.1 and JAGS 4.3.0 software. FINDINGS: On average, 27 people per 100,000 people were killed in traffic accidents during 2006-2017. The highest negative growth rate...
Journal of Community Health Research
Introduction: Diabetes is one of the most common diseases caused by metabolic disorders. It is th... more Introduction: Diabetes is one of the most common diseases caused by metabolic disorders. It is the result of impaired secretion or function of insulin. The prevalence of diabetes is increasing rapidly. The aim of this study is to investigate the performance of different decision tree algorithms in the diagnosis of diabetic retinopathy. It was done using a database regarding diabetic patients. They were referred to Yazd Diabetes Research Center. Method: This study was analytical and cross-sectional. 2613 patients visited Yazd City's research and treatment center. Their demographic information was received in the first stage. Then, they were tested by the nursing team, and the patient's information form was completed by the respective nurse. After that, the descriptive indicators of mean, mode, median, variance, frequency, and percentage of missing data were observed. Four diagnostic models (Chadi), classification tree and regression (C and R), (Quest) and C 5.0 were compared....
مجله دانشکده پزشکی اصفهان, 2017
Background: Kidney transplantation is the preferred treatment for most patients with end-stage re... more Background: Kidney transplantation is the preferred treatment for most patients with end-stage renal disease (ESRD) and therefore, kidney transplantation survival analysis is important. The aim of this study was to determine the cumulative survival rate of renal transplantation and the factors affecting it. Methods: This was a historic cohort study including information of 381 patients with end-stage renal disease who underwent kidney transplantation surgery from December 2007 to March 2016 in Noor hospital, Isfahan, Iran. The Kaplan-Meier method, Log Rank test and Cox regression model were used for statistical analysis. Data analysis was carried out with R software, Version 3.1.0, at the significance level of P < 0.05. Findings: According to Kaplan-Mayer method, 1-, 3-, 5- and 8-year survival rates of transplanted kidney were estimated as 98.7, 93.3, 86.9, and 83.9 percent, respectively. The results of Cox regression model indicated that the time duration of dialysis before tran...
Background: In today competitive world, human work force has always been a concern for organizati... more Background: In today competitive world, human work force has always been a concern for organizations, especially healthcare providers, and organizations are always looking for improving their employees' job performance. Among various factors affecting job performance are two factors of organization and personality traits of the workforce. Therefore, the aim of this study was to investigate the relationship between five personality traits of nurses and the organization knowledge of their job performance. Methods: This is an analytical study conducted in a cross sectional way in 2016. Sixty one nurses working in a traumatic hospital proportional to different wards were selected and entered the research. The instruments for collecting data were three organizational knowledge questionnaires (35 items), five personality traits (60 items), and job performance (15 items). Data were analyzed using SPSS20 and descriptive statistics and artificial neural networks. Results: Among demograph...
Introduction and purpose: Carbon monoxide (CO) and particulate matter (PM 2.5) are among the most... more Introduction and purpose: Carbon monoxide (CO) and particulate matter (PM 2.5) are among the most important environmental pollutants arising from different sources, such as vehicle exhaust, industrial process, and secondary pollutants. These pollutants lead to increased pulmonary vascular diseases and decreased vision. Moreover, they damage the plants, animals, and objects. The aim of this study was to investigate the concentration trend of these pollutants in Mashhad, Iran, during 2016. Methods: In this study, the data of the Air Quality Control Company were used to assess the concentration of CO and PM 2.5. In addition, the meteorological data, such as wind velocity and temperature, were extracted. Results: According to the monthly average CO concentration, CO had the highest and lowest concentration levels in December and May, respectively. Furthermore, regarding PM 2.5 , the maximum and minimum concentration values were observed in May and January, respectively. In 58.3% of the ...
Introduction and purpose: Assessment of quality of life (QOL) in rheumatoid arthritis (RA) patien... more Introduction and purpose: Assessment of quality of life (QOL) in rheumatoid arthritis (RA) patients is of great importance to provide insight to health researchers, health planners, and clinical specialists. Therefore, the aim of this study was to evaluate QOL and the factors affecting it in patients with RA. Methods: This descriptive-analytical study was performed in 2014. A total of 185 rheumatoid arthritis patients were selected using convenience sampling method at Shariati Hospital of Tehran, Iran. The data collection tools included demographic and clinical factors, health status (Arthritis Impact Measurement Scale 2 [AIMS2]), and 20-Item Short Form QOL questionnaires. Data were analyzed by SPSS 16 using univariate and multivariate regression analyses. Results: Based on the results, it was found that the mean age of patients was 46.97±11.47 years. In general, 80.5% of the participants were women, of whom 67.6% were housewives and 90% had diploma or lower education. The results s...
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2001
The design of a detector based on MICROMEGAS (MICRO MEsh GAseous Structure) technology is present... more The design of a detector based on MICROMEGAS (MICRO MEsh GAseous Structure) technology is presented. Our detector is characterized by a large active area of 398×281 mm 2 , a pad read-out with 20×22 mm 2 segmentation, and an uniform amplification gap obtained by insulating spacers (100 µm high and 200 µm in diameter). The performances of several prototypes have been evaluated under irradiation with secondary beams of 2 GeV/c momentum charged pions and electrons. We consider such a detector as the basic element for a pre-shower detector to equip the PHOton Spectrometer (PHOS) of the ALICE experiment. Its assets are modularity, small amount of material, robustness and low cost.
Environmental Science and Pollution Research, 2021
The median effective concentration (EC50) is the concentration of a substance expected to produce... more The median effective concentration (EC50) is the concentration of a substance expected to produce a specific effect in 50% of the populations with a certain density under defined conditions. This parameter is expressed as an acute toxicity and is obtained via chemical toxicity testing. But, the laboratory work is time-consuming, expensive, and not eco-friendly. Therefore, to predict EC50 for new anionic surfactants, a quantitative structure-activity relationship (QSAR) tool was studied for modeling the EC50 of anionic surfactants on Daphnia magna based on the molecular descriptors. The best model (R2 = 0.901 and F = 118.077, p<0.01) included 3 variables of the number of carbons, hydrogens, and the octanol-water partition coefficient logarithm. The main contribution to the toxicity was the octanol-water partition coefficient logarithm descriptor that had a negative effect on the toxicity of surfactants. The QSAR approach exhibited good results in predicting anionic surfactants EC5...
Journal of Education and Health Promotion, 2019
BACKGROUND: HIV-infected patients with poor antiretroviral therapy (ART) adherence are prone to d... more BACKGROUND: HIV-infected patients with poor antiretroviral therapy (ART) adherence are prone to depression, and depression can exacerbate the disease condition. This study was conducted to determine ART Adherence based on Information, Motivation, and Behavioral Skills (IMB) Model and its association with depression among HIV-positive patients. MATERIALS AND METHODS: This descriptive–correlational study was carried out on people over the age of 18 years with HIV/AIDS, who referred to the Behavioral Diseases Counseling Center in Kerman City, Iran, in 2017. In this regard, 119 patients were selected using the table of random numbers. To collect the data, we used the Beck's depressioninventory-II and the IMB researcher made questionnaire to evaluate the ART adherence. RESULTS: The results of the study reveal that a significant association was observed between the total adherence and all constructs of the IMB model (P < 0.001). Risk perception and self-efficacy had the highest mea...
Article History: Received: 8 Oct 2017 Revised: 2 Feb 2017 Accepted: 12 Mar 2018 Background: In to... more Article History: Received: 8 Oct 2017 Revised: 2 Feb 2017 Accepted: 12 Mar 2018 Background: In today competitive world, human work force has always been a concern for organizations, especially healthcare providers, and organizations are always looking for improving their employees' job performance. Among various factors affecting job performance are two factors of organization and personality traits of the workforce. Therefore, the aim of this study was to investigate the relationship between five personality traits of nurses and the organization knowledge of their job performance. Methods: This is an analytical study conducted in a cross sectional way in 2016. Sixty one nurses working in a traumatic hospital proportional to different wards were selected and entered the research. The instruments for collecting data were three organizational knowledge questionnaires (35 items), five personality traits (60 items), and job performance (15 items). Data were analyzed using SPSS20 and...
International Journal of Pediatrics, 2018
Background: Menstruation is a natural and physiologic process that is managed based on various so... more Background: Menstruation is a natural and physiologic process that is managed based on various socio-cultural habits and behaviors. Cultural beliefs about menstruation can improve or worsen menstrual health behavior. The present study aimed to explore the cultural beliefs about menstrual health in Bam city, Iran. Materials and Methods: This is a qualitative study with Directed Content Analysis approach. The participants were a total of 34 individuals including; 14 girl students, 12 female parents, 8 school associates and health educators of 5 secondary schools in Bam city, Iran. The subjects were selected based on an objective-oriented approach which continued until data saturation. Data collection method was with the use of in-depth and semi-structured interview. Data were analyzed with Granehim and Lundman suggested steps. Results: The analysis of data identified 58 initial and conceptual codes, 15 sub- categories and 5 categories of beliefs related to menstruation including belie...
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Papers by mohsen askarishahi