Showing 199 results for Mohammad
F Golbabaie, M Ostadi, K Mohammad, V Ostadi, M Rismanchian, A Tirgar, Sj Sahtahery,
Volume 5, Issue 3 (4 2007)
Abstract
Background and Aim: Exposure to hexavalent chromium in plating operations is associated with skin ulceration, contact dermatitis, respiratory tract irritation, cancer, and kidney damage. We investigated the possibility of using biological monitoring to assess exposure to hexavalent chromium in chrome-plating workers. We compared mean Cr6 concentrations in the breathing zone plus urine chromium, β2 microglobulin (B2M), and N-acetyl-B-D- glucosaminidase (NAG) at the end of the working shift. Then we assessed the correlation between exposure to hexavalent chromium and biological indicators.
Materials and Methods: This study involved 45 chrome platers (Cases) and 40 zinc platers (Controls) in Isfahan. Air and urine samples were collected at the end of the work shift. Measurement of Cr6 concentrations in the workers' breathing zone was performed using the NIOSH Methods 7600. Urine Cr levels were determined by atomic absorption spectrophotometry, with a graphite furnace (Shimadsu, AA680). B2M and NAG were measured by Kits.
Results: Overall, geometric mean of hexavalent chromium concentrations in the breathing zone was significantly higher among chrome platers (14.577 μg/m3) compared to zinc platers (0.862 μg/m3, p<0.001). Moreover, the mean urine Cr concentrations were higher in chrome platers (9.198 vs. 1.811 μg / g creatinine, p<0.001). Similarly, there were significant differences between mean NAG in chrome platers (12.608IU/gr creatinine) and zinc platers (6.824 IU/g creatinine, p<0.001). Differences in B2M concentrations were not significant (p>0.05). A significant correlation was found between Cr6 concentrations in the chrome platers' breathing zone and their urinary chromium levels (r= 0.838, p<0.001). A similar association was found between concentrations of Cr6 and NAG in the breathing zone (r= 0.304, p<0.05).
Conclusion: As urinary B2M concentration did not change significantly, it may not be a sensitive indicator in evaluating exposure to hexavalent chromium. There were significant differences between mean urinary Cr and NAG concentrations in the two groups. The significant correlations between Cr and NAG concentrations indicate that these markers may be suitable indicators of exposure to hexavalent chromium. Our results indicate that NAG is an early indicator of renal dysfunction in chrome platers.
H Mohammadi, F Kafilzadeh, E Kadivar,
Volume 5, Issue 3 (4 2007)
Abstract
Background and Aim: In this research we isolated the bacterial species degrading polycyclic aromatic hydrocarbons (PAHs) and determined optimal salt concentration for PAH degradation.
Materials and Methods: We used naphthalene and anthracene as the only sources of carbon for isolating PAH-degrading bacteria the main culture medium was ONR7a. The bacteria isolated by this method were used for the study of the effect of salt concentration on PAH degradation.
Results: Pseudomonas is the only PAH-degrading bacterium isolated from the lake's water and sediment. The greatest numbers of naphthalene- and anthracene-degrading bacteria where found in the water and sediment from the Khoshk River (mean counts: 227 and 167 per ml water and 290 and 193 per gram of sediment). The mean counts of naphthalene- and anthracene degrading bacteria in Pol- Fasa River were 107 and 73 per ml water and 157 and 127 per gram sediment, respectively. Values from Nazar Abad River were 27 and 17 /cc water and 43 and 20 / g sediment. In the center of the lake counts were 63 and 33 per ml water and 123 and 73 per gram sediment and in the western part of the lake counts were 30 and 13 /ccl water and 43 and 17 /g sediment.Maharloo lake is located in south-east of Shiraz, 23 km from the city and contains saline water with a mean salt content of 220 g/L. Among the most important pollutants entering the lake are polycyclic aromatic hydrocarbons (PAHs). Our research showed that overall, naphthalene-degrading bacteria are present in greater numbers compared to anthracene-degrading bacteria. The optimal salt concentration for the growth of Pseudomonas spp growth and PAH-degradation is around 6% the rate of degradation increases with time.
Conclusion: Regarding isolation of PAHs degrading bacteria from the lake, it is obvious that part of the degradation is done by bacteria. The main bacterium here is pseudomonas and it is optimally active at a salt concentration of 6%.
K Mohammad, F Majlessi, H Namdari Tabar , A Safarpor , Z Laghaei , A Cheshmberah ,
Volume 6, Issue 1 (4 2008)
Abstract
Background and Aim: Considering the fact that injecting drug is the most common way of HIV transmission and having the point in mind that in spite of syringes availability, many of the IDUs still continue sharing needles, determining behaviors which lead them not to use HR packages seems invaluable. Determining the influential factors in sharing needles among IDUs who are Kermanshah's DIC clients and are provided with training program and HR Packages (syringes, needles, bleaching and condoms).
Materials and Methods: These subjects were studied in 2 steps. The first FGD (focus group discussions) and the second a cross sectional study. To gather data that we use a questionnaire based an FGG which includes: general characteristics, characteristics related to drug abuse and information about HIV.
Results: out 437 of cases that took part in the interview, 367 cases were IDUS. Among whom 28% individuals shared needles. The medium age was 33/4 and there was no significant difference between the two age groups. Only 27% were married. 61% of cases were unemployed. The unemployment rate among IDUs who share needles and syringes was a lat more significant (p=000) than those who don't share needles (P=000). The percentage of IDUs who share needles and don't living houses was higher than of those who live in houses (P=000). Most of cases started taking drugs before they were 20 years old.
Conclusion: Low Education degree unemployed, no married. Live in street, start IDUs in low age the period of referring to DIC were the most important factors for share needles injection
F Koohdani, F Sasani, K Mohammad, P Mehdipour,
Volume 6, Issue 1 (4 2008)
Abstract
Background and Aim: To determin the most sensitive tissues to carcinogenic effect of urethane and co-carcinogenic effect of sodium nitrite by investigation of histopathological variations in different tissues of balb/c mice.
Materials and Methods: An experimental study in 40 inbred balb/c mice aged 9-11 weeks was designed. The samples were classified into 4 groups: The first group was mice treated with 50 mg/l sodium nitrite in 0.9% NaCl instead drinking water SN&NaCl). The urethane group (U) was characterized by intraperitoneal injection of 3 times urethane (600 mg/ kg/day at 48 hour intervals). The third group was given 50 mg/l sodum nitrite in drinking water (U&SN) following the same intake of urethane as the second group, and the forth one was the control group. All mice were sacrificed after 20 weeks tissues were removed and examined for histopathological changes. Data analyzed by Fisher exact test.
Results: The formation of lung tumor was, significantly, increased in the urethane group as compared with the control group & (NS+Nacl) groups ( respectively P<.004 & P<.02) and in (U+NS) group as compared with the control group & (NS+Nacl) groups ( respectively P<.003 & P<.02). In females mice also The formation of lung tumor was, significantly, increased in the urethane group as compared with the control group & (NS+NaCl) groups (P<.05) and in the (U+NS) group was significantly higher than those in (C) & (NS+NaCl) groups (P<.009). The formation of lung adenocarcinomas was, significantly, increased in the (U+NS) group as compaired with the (C) & (NS+Nacl) groups (P<.003). In females mice also the formation of lung adenocarcinomas was, significantly, increased in the (U+NS) group as compaired with the (C) & (NS+Nacl) groups (P<.009) and (U) group (p<.05).The frequencies of stomach and testis hyperplasia and metaplasia in different groups did not show any significant differences. There was no histopathological variation in other tissues.
Conclusion: Our results showed the tumorigenic effect of urethane in lung tissue. Sodium nitrite increases tumorogenic effect of urethan. Sodium nitrite increases carcinogenic effect of urethan (This result is the first study that suggest sodium nitrite increases carcinogenic effect of urethan).Urethan increases co-carcinogenic effect of sodium nitrite.
A Mesdaghinia, H Nourmoradi, F Vaezi, S Naseri, R Nabizadeh, M Ali Mohammadi, Sh Nazmara,
Volume 6, Issue 2 (27 2008)
Abstract
Background and Aim: Methyl tertiary butyl ether (MTBE) is an oxygenated additive chemical added to gasoline, which is as a substitute for tetra ethyl lead, to reduce discharge of pollutants from automobile exhausts. This organic chemical is present in water samples collected from areas where gasoline wastes are abundant. The objective of this study was to investigate the possibility of MTBE removal from drinking water at the point of use (POU) by using an Iranian granulated active carbon (GAC) bed.
Materials and Methods: Adsorption of MTBE from drinking water at POU was studied by using an Iranian GAC bed. The water samples treated by this filter adsorber were prepared synthetically at two concentrations (50 ppb and 100 ppb). In addition, the effects of residual chlorine at concentrations of 0.2 and 0.5 mg/L and of chloroform at a concentration of 100 ppb on removal of MTBE were determined.
Results: It was found that this filter adsorber could treat 375 liters of water containing 50 ppb MTBE, 100 ppb chloroform and 0.2 ppm residual chorine. If the residual chlorine content was increased to 0.5 ppb, the volume of water treated would be 335 liters. The filter could t eat 195 liters of water containing 100 ppb MTBE, 100 ppb chloroform and 0.2 ppm residual chlorine to acceptable levels for drinking, provided the amount of MTBE is below the respective standard.
Conclusion: Both residual chlorine and chloroform reduced the MTBE adsorption capacity on GAC due to occupation of adsorption sites. In addition, to the tendency of GAC to adsorb chloroform and chlorine was greater than that of MTBE.
L Salehi , H Efftekhar Ardabili, K Mohammad , M Taghdisi , A Jazayery , D Shogaeizadeh , A Rashidian ,
Volume 6, Issue 2 (27 2008)
Abstract
Backgrounds and Aim: Increased life expectancies and decreased fertility rates have led to ageing populations worldwide. This phenomenon is one of the most important public health challenges of the current century. Previous studies have shown that identifying factors affecting lifestyle and educational needs help in designing new strategies for health promotion. This study was conducted to investigate the preparedness of the elderly to adopt a healthy lifestyle and factors affecting it in the City of Tehran in 2007.
Materials and Methods: This qualtative study included 60 elderly persons from Tehran elderly centers, using the focus group discussion method. Sampling was targeted and a qualitative methodology was used for analysis of the data collected.
Results: The results shows that different elderly persons have different views with regard to what physical and mental health is and what factors cause healthiness. They believe that regular physical activity is very beneficial but that there are many difficulties in performing regular physical activity. Most of the subjects are in the prepation, action and maintenance stages as regards physical activity. On the other hand, nearly all the subjects are in the precontemplation stage with regard to fruit and vegetable consumption, despite the many obstacles in following a healthy diet.
Conclution: The findings of this study show that many factors influence adoption of a healthy lifestyle by the elderly. Bearing these factors in mind, appropriate educational strategies aiming at facilitating adoption of a healthy lifestyle can be designed.
K Kamali, K Mohammad, H.r Khorram Khorshid, A Mirabzadeh A, A Fotouhi,
Volume 6, Issue 3 (13 2009)
Abstract
Background and Aim: Case-Control studies provide evidence in the area of health. Validity and accuracy of such studies depend to a large extent on the similarity (similar distributions) of the case and control groups according to confounding variables. Matching is a method for controlling or eliminating the effects of important confounders. Matching using propensity score has recently been introduced to control the effect of confounders, especially when there are many of them in a study.
Materials and Methods: Matching according to propensity score was used in a genetic association study-a case-control study involving 300 subjects-to assess the effect of candidate genes on Alzheimer's disease in the Iranian population. Propensity score was calculated using STATA.8 software age, sex, education level, job and genetic background were included in the model to calculate the score.
Results: A total of 385 blood samples were taken from the participants. We managed to extract DNA in 155 of the 173 case subjects and in 161 of the 212 control subjects. The model for propensity score was statistically significant. Of the total of 316 DNA samples, 302 were matched based on their calculated propensity scores, while the individual matching method could only deliver 28 pairs.
Conclusion: The propensity-score matching method results in selection of a larger number of pairs, as compared with the conventional individual matching method. We propose to use this method, which also ensures a similar distribution of confounders between the case and control groups, particularly when there are limitations in the number of subjects available for matching.
F Ghamari, A Mohammad Beygi , R Tajik,
Volume 7, Issue 1 (23 2009)
Abstract
Background and Aim: The lack of balance between job needs and workers' physical capacity may lead to work-related musculoskeletal disorders (Wises). WMSDs are one of the most important occupational health problems in developing countries. These problems are due to risk factors such as poor work postures, excessive force applied, repetitive movements, vibration, prolonged work duration, and psychological factors, leading, ultimately, to disorders ranging from mild low back pain to severe disabilities. This study aimed at determining the prevalence of WMSDs in different body regions, assessing posturing, and detecting ergonomic and individual risk factors causing musculoskeletal disorders, in Araki bakery workers in Arak, Iran.
Methods and Materials: In this cross - sectional study 233 randomly selected bakery workers in Arak were included, and the prevalence of symptoms of musculoskeletal disorders and their risk factors, with particular emphasis on work posture, was determined in them. The method used was OWAS and the NMQ Questionnaire.
Results: The highest prevalences of musculoskeletal disorders were in the knees (62.2%), low back (58.8%), legs (53.9%) and shoulders (44.6%) of the workers. Low back and shoulder injuries in Shaaters (workers in charge of baking the bread) and elbow, thigh and low back disorders in Choongeers (workers in charge of dividing and rounding the dough) were more prevalent than in other occupations. There is a positive association between type of occupation and these disorders (p<0/05). According to the OWAS's classification, the distribution of bakery workers' working postures was as follows: 58.5% in the action category 1 (natural posture), 34.7% in the action category 2 (stress posture), 4% in the action category 3 (harmful posture), and 2.5% in the action category 4 (very harmful posture). There was a significant relation between work service record and neck, elbow, shoulder, and knee disorders (p<0/05).
Conclusion: This study revealed that the working postures of 42.2% of Aaraki bakery workers were slightly to very harmful postures in addition, there was a high prevalence of WMSDS in different body regions of the workers. Ergonomic interventions are essential to improve the situation and protect better the health of the workers.
M Arab, R Khabiri, A Pourreza, J Saeedpour, H Zeraati, A Mohammadnegad,
Volume 7, Issue 2 (4 2009)
Abstract
Background and Aim: Organizational centralization, an important concept/system in management, relates to hierarchy of authority and degree of participation in decision-making. In this study we aimed to determine the extent of organizational centralization in hospitals affiliated with Tehran University of Medical Sciences (TUMS), Tehran, Iran and identify factors affecting the organizational centralization at the level of executive managers.
Methods and Materials: All the managers and head nurses of 13 TUMS hospitals (26 subjects) were included in this cross-sectional study in 2005. Data, collected using questionnaires, were analyzed using the following tests: t-test, ANOVA, Pearson and Spearman, the software being the SPSS. The extent of organizational centralization was categorized into centralized, semi-centralized, and uncentralized.
Results: Five of the 5 variables studied were statistically significantly associated with organizational centralization. They were gender (p=0.001), organizational position (p=0.005), attending management courses (p=0.001), and financial burden of decisions (p=0/03) in the hospital managers group, and possibility of controlling the decision (p=0.014) in the head-nurses group.
Conclusion: The average organizational centralization in the hospitals was 75.38% it was 76.3% and 73.38% for hospital managers and head-nurses, respectively. On the whole, the management system of TUMS hospitals is a semi-centralized system.
M Morowatisharifabad, H Nadrian, A Falahi, M Mohammadi,
Volume 7, Issue 3 (7 2009)
Abstract
Background and Aim: Based on WHO reports, there are about 100-150 million people with asthma around the world and the number is increasing. Asthma is a prevalent disease and permanent self-management is needed in order to control the symptoms and maintain the normal action of the lungs and a normal level of activity. The Green's Model of Health Education Planning provides a systematic process for planning, implementation and evaluation of population health promotion programs and is used in a broad range of issues in health promotion, including self-management in asthma. This study was carried out with the aim of determining predictors of self-management behaviors in patients with asthma in Yazd, Iran, based on the above-mentioned model.
Methods and Materials: In this cross-sectional study convenience sampling was employed to recruit 94 outpatients with asthma from among those referring to Shaheed-Sadooghi Clinic in Yazd, Iran. Data were collected using a questionnaire based on the Green's Model constructs, consisting of predisposing, reinforcing, and enabling factors and self-management behaviors. Reliability and validity of the questionnaire were assessed prior to data collection.
Results: The subjects acquired 49.5%, 68.6%, 67.3%, and 61.2 % of the earnable scores for self-management behavior, predisposing factors, reinforcing factors, and enabling factors, respectively. Predisposing, reinforcing, and enabling variables had positive correlations with self-management behaviors (p<0.01) and accounted for 34.6% of the self-management variance. Predisposing factors were the strongest predictor (β = 0.480).
Conclusion: It is concluded that the Green's Model of Health Education Planning can be used in developing countries, such as Iran, as a framework for planning intervention programs in an attempt to improve the self-management behaviors of patients with asthma. Designing and implementing educational programs aiming at promoting self-management behaviors in asthmatic patients with emphasis on predisposing factor enhancement is recommended.
Mohammad Ali Zazouli, Simin Nasseri, Amir Hossein Mahvi, Ali Reza Mesdaghinia,
Volume 7, Issue 3 (7 2009)
Abstract
Background and Aim: Natural organic matter (NOMs), measured on the basis of organic carbon, produces disinfection by-products precursors (DBPs) during the chlorination process. Some DBPs are carcinogenic. NOMs are not completely removed by conventional water treatment. As a result, in addition to forming DBPs, they support bacterial regrowth in the water distribution systems and cause unpleasant odor and taste and other problems. The objective of this study was to determine organic carbon concentration and DBPs formation potential in drinking water of the water distribution system in Tehran, Iran.
Methods and Materials: Water sampling was done by standard methods, monthly between August 2006 and Feb 2007, at four points of the drinking water distribution system in Tehran. Quantitative parameters, including pH, EC, UV254 (UV absorbance at a wavelength of 254nm), dissolved organic carbon (DOC), and specific UV absorbance (SUVA) were determined. DOC and UV-254 of the samples were determined using a Total Organic Carbon (TOC) analyzer and a Lambda 25 UV/Vis spectrophotometer, respectively. SUVA (L/mg.m) was calculated as thea ratio of the UV absorbance at 254 nm (1/m) to DOC (mg/ L).
Results: The water content of DOC at the four points of the distribution system was less than 0.7 mg /L. The mean DOC concentration was 0.3±0.14mg/L, ranging between 0.12 and 0.687mg/L, with no monthly variation. The mean SUVA was 1.3±0.7.
Conclusion: It can be concluded that the Tehran water treatment systems cannot eliminate completely natural organic matter. SUVA values show, however, that the system can eliminate the majority of hydrophobic compounds. Therefore, formation of haloacetic acids is more probable than that of trihalomathanes.
J Sadighi, K Mohammad, R Sheikholeslam, P Torabi, F Salehi, Z Abdolahi, H Pouraram,
Volume 7, Issue 4 (27 2010)
Abstract
Background and Aim: Anemia is an important public health problem in Iran. The most prevalent type (50%) is iron-deficiency anemia. Flour fortification with iron and folic acid is one of the main strategies usually adopted to combat anemia. Two pilot projects were conducted in 2 Iranian provinces: the first one in Bushehr in 2001 and the second one in Golestan in 2007. The present study was conducted in January 2009 to evaluate the process and determine the effectiveness of the flour fortification pilot project in the 2 provinces.
Materials and Methods: To evaluate the effectiveness of the project, blood hemoglobin and ferritin levels were measured in a sample population of child-bearing women aged 15-49 years in Bushehr Province (n=600) and Golestan Province (n=625), selected by multi-stage sampling before and after the intervention. For process evaluation, the iron content in samples of flour and bread made from the flour were measured in a descriptive study.
Results: We found similar trends in the indicators of anemia/iron deficiency among the women in Bushehr and Golestan provinces. The flour fortification project appears to have had beneficial effects on the serum ferritin levels (low levels indicate iron deficiency) in both provinces. The prevalence of iron deficiency decreased from 22.2% to 15.7% (p<0.002) and from 26.7% to 14.6% (p<0.001), in Bushehr and Golestan, respectively. However, the prevalence of anemia was significantly higher after intervention in Golestan (p<0.001). Further analysis of the data also revealed that the intervention did not have any statistically significant effect on the prevalence of iron-deficiency anemia in either province. The coverages of fortified flour and bread were 90% and 98.7% in Bushehr and 94.1% and 95% in Golestan, respectively.
Conclusion: The flour fortification pilot project in Iran resulted in reducing prevalence of iron deficiency and improving body iron reserves in women, but it had no effect on anemia prevalence. It can be concluded that in circumstances where iron deficiency is not a major cause of anemia, interventions such as flour fortification with iron alone will not produce any significant effect.
Sh Rahimi Kamal, J Nasl Saraji, I Mohammad Fam ,
Volume 7, Issue 4 (27 2010)
Abstract
Background and Aim: Human error often plays an important role in accident causation either through direct action or poor design . The focus of this work is was on prediction of human error probabilities during the process of emergency musters on in gas compressor stations . This paper aims to present a brief description of Human Error Probability Index (HEPI) for the on gas compressor station musters process.
Materials and Methods : Due to a lack of human error databases, and in particular human error data on gas compressor station musters, an expert judgment technique, the Success Likelihood Index Methodology (SLIM), , was adopted as a means to predict human error probabilities Two muster scenarios of varying severity (gas release, fire and explosion) were studied in detail . A total of 34 reference graphs provided data for both the weighting and rating of six performance shaping factors and the data were subsequently processed by means of SLIM to calculate the probability of success for 16 muster actions ranging from point of muster initiator to the final actions in the temporary safe refuge (TSR). The actions were categorized into 4 phases, namely, awareness, evaluation, egress, and recovery phases. The six performance shaping factors considered in this work were stress, complexity , training, experience, event factors, and atmospheric factors .
Results: Human error probabilities in the egress phase were highest, followed by those in the evaluation phase the lowest were in the awareness phase.
Conclusion: The HEPI can be applied to limit the chances of human error occurrence and mitigate the consequences of such errors through changes in training, design, safety systems, and procedures, resulting in a more error-tolerant design and operation .
Y Mohammadi, M Javaheri, L Mounesan, Kh Rahmani, K Holakouie Naeini, A Madani, F Ghasemi,
Volume 8, Issue 1 (10 2010)
Abstract
Background and Aim: Community involvement is the most important strategy in development. In health program planning, community assessment is a process in which society members get a thorough understanding of all matters, problems, resources, weaknesses, strengths, needs, and surveillance related to health by collecting, analyzing, and publishing relevant data and information. This study was conducted to identify and prioritize problems of the Chahestani region, a poor region in Bandar-Abbas city, Iran, with active participation of the people.
Materials and Methods: The study was based on a model designed in North Carolina, US. In this model, the assessment process is performed in eight steps. In the first seven steps problems are identified and prioritized, and in step 8 a plan of action is developed to deal with the problem selected.
Results: A total of 60 problems were identified, of which the following were considered to be top priorities: lack of responsibility of the authorities, insecurity, unemployment, poverty, sewerage disposal, insufficient water, insufficient electricity, unpaved roads, lack of green space, and dirty streets and passages.
Conclusion: Most of the problems identified were non-health problems, including social, cultural, and economic issues.
M.r Ghadimi, M Mahmoodi, K Mohammad, H Zeraati, M Hosseini, M Sheikh Fathollahi,
Volume 8, Issue 2 (21 2010)
Abstract
Background and Aim: The most common cancer in Iran is digestive system cancer, the highest incidence of which is reported from the Caspian Sea littoral. This study aimed to determine factors affecting the survival of patients with gastrointestinal cancer using the Cox and parametric models the 2 models were compared.
Materials and Methods: This survey was a prospective study conducted between 1990 and 1991. Data were collected through the Cancer Registry Center in Babol, which functions under supervision of the School of Public Health and Institute of Public Health Research, Tehran University of Medical Sciences. We tried to identify cases of gastrointestinal cancers. The individual characteristics of 484 patients, namely, age, sex, family history, marital status, smoking status, occupation, ethnicity, medication status, education, residence (urban, rural), and type of cancer were recorded. The patients were followed up for a period of 15 years, i.e., until 2006 year. To determine the effective factors on survival of patients, the Cox model and parametric models such as exponential, weibull, log-normal, log-logistic, and the AIC criteria and residuals were used to compare the effectiveness of the models. The SAS and STATA software were used for data analysis, with a significant level of 0.05.
Results: Sixty-six percent of the patients (total n=484) were males and 34% females, with a mean age of 59 and 55 years, respectively. Their distribution according to type of cancer was as follows: esophageal cancer, 359 (74.2%) stomach cancer, 110 (22.7%) colorectal cancer, 15(3.1%). Estimated one-, three-, and five-year survival rates were 24%, 16% and 15%, respectively.
Conclusion: The results of this study reveal that gender and family history can be strong risk factors for GI cancer. Log-normal and log-logistic models in multivariate and univariate analyses gave almost similar results. However, based on AIC criteria and residuals analysis, the log-logistic model gives the best fit as compared to other parametric models and can be used instead of the Cox model for determining factors affecting survival of patients with gastrointestinal tract cancer.
Mehdi Mohebali, Gholamhossein Edrissian, Mohammad Reza Shirzadi, Yavar Hosseingholizadeh, Mohammad Hossein Pashaei, Akbar Ganji, Zabihallah Zarei, Ahmad Kousha, Behnaz Akhoundi, Homa Hajjaran, Hossein Malekafzali,
Volume 9, Issue 2 (21 2011)
Abstract
Background and Aim: Visceral leishmaniasis is a systemic parasitic disease with a high fatality rate in under-5-year-old children. The disease is endemic in some parts of Iran, particularly in the north-west region. In 2001 a visceral leishmaniasis (VL) surveillance system was established for children aged ≤ 12 years in the primary health system in Meshkin-Shahr District, Ardebil Province, situated in the north-west of Islamic Republic of Iran.
Materials and Methods: All cases with clinical signs and symptoms of VL and confirmed positive by the direct agglutination test (DAT) were referred for physical examination and treatment.
Results: The mean annual incidence of VL decreased significantly from 1.88 per 1000 children before (1985-2000), to 0.77 per 1000 child population after (2001-07), the intervention. In the control area with no surveillance, it increased from 0.11 to 0.23 per 1000.
Conclusion: Early detection of VL using serological tests and timely treatment of cases can decrease the mortality and morbidity rates of VL in endemic areas.
Sima Zaeri, Saba Asgharzadeh, Shiva Khoshnevis, Mehrnoush Mohammadi, Kourosh Holakouie Naeini,
Volume 9, Issue 2 (21 2011)
Abstract
Background and Aim: Community assessment is a process by which a clear picture of the community assets, strengths, resources, and needs is obtained with active participation of the community itself, followed by prioritization of the community needs and formulating strategies and programs to solve the problems. This study was conducted to identify and prioritize problems and needs of the Azerbaijan Borough in Tehran city, Iran, with active participation of the people.
Materials and Methods: This study was conducted to determine the attitudes and beliefs of the community members about their community needs and problems. The study was based on a model designed in North Carolina, US. In this model, the assessment process is performed in eight steps. In the first seven steps problems are identified and prioritized, and in step 8 a plan of action is developed to deal with the problem selected.
Results: A total of 40 problems were identified and divided into several groups. The most important problems were as follows: social problems environmental health problems educational and cultural problems, civil rights and urban services distribution and use of drugs lack of family counseling centers shortage of parks and playgrounds for neighborhood children lack of supervision by municipal contractors on urban cleaning and lack of mental health services specially for the elderly.
Conclusion: Several types of problems, including health, as well as non-health - social, cultural and economic - problems were identified. Community assessment provides an appropriate opportunity for active participation of community members and makes available sufficient information for sound decision-making. Thus, community assessment can be regarded as a suitable technique for identifying and prioritizing community needs.
Alireza Didarloo, Davood Shojaeizadeh, Hasan Eftekhar Ardebili, Shamseddin Niknami, Ebrahim Hajizadeh, Mohammad Alizadeh,
Volume 9, Issue 2 (21 2011)
Abstract
Background and Aim: Many studies show that the only way to control diabetes and prevent its debilitating complications is continuous self-care. This study aimed to determine factors affecting self-care behavior of diabetic women in Khoy City, Iran based the extended theory of reasoned action (ETRA).
Materials and Methods: A sample of 352 women with type 2 diabetes referring to a Diabetes Clinic in Khoy City in West Azarbaijan Province, Iran participated in the study. Appropriate instruments were designed to measure the relevant variables (diabetes knowledge, personal beliefs, subjective norm, self-efficacy and behavioral intention, and self-care behavior) based on ETRA. Reliability and validity of the instruments were determined prior to the study. Statistical analysis of the data was done using the SPSS-version 16 software.
Results: Based on the data obtained, the proposed model could predict and explain 41% and 26.2% of the variance of behavioral intention and self-care, respectively, in women with type-2 diabetes. The data also indicated that among the constructs of the model perceived self-efficacy was the strongest predictor for intention for self-care behavior. This construct affected both directly and indirectly self-care behavior. The next strongest predictors were attitudes, social pressures, social norms, and intervals between visiting patients by the treating team.
Conclusion: The proposed model can predict self-care behavior very well. Thus, it may form the basis for educational interventions aiming at promoting self-care and, ultimately, controlling diabetes.
Abolfazl Askary Sary, Mohammad Velayatzadeh, Mozhgan Khodadadi, Mohammad Kazemian,
Volume 9, Issue 3 (6 2012)
Abstract
Background and Aim: The objective of this study was to determine the contents of heavy metals Hg, Cd and Pb in the muscle, liver and gill tissues of Liza abu fish in the Dez and Bahmanshir Rivers in Khoozestan Province, Iran in winter 2010.
Materials and Methods: The study included 108 samples of Liza abu tissues. The metals were extracted from the tissues using the wet-digestion method and their concentrations were determined by atomic absorption spectrophotometer Perkin Elmer 4100. Analysis of the data was done using the SPSS17 software, the statistical test being the t-test ((p≤0.05).).
Results: The highest concentrations (mg/Kg) of Hg (0.029±0.005), Cd (0.506±0.047) and Pb (1.07±0.096) were found in the gill and their lowest concentrations, 0.023±0.001, 0.346±0.040 and 0.903±0.030, respectively, in the muscle. The concentrations of Cd in the gull, muscle and liver were significantly different (p≤0.05) between the Dez and Bahmanshir River fish samples, but the differences with regard to Hg and Pb concentrations were not different between the 2 rivers (p≥0.05).
Conclusion: The mercury content of Liza abu tissues was lower, while the lead and cadmium contents were higher, than the respective WHO standards (permitted levels).
Azar Hadadi, Mehrnaz Rasoulinezhad, Saeed Jamali, Seyed Ahmad Seyed Ali Naghi, Kousha Paydari, Mohammad Ali Boyer, Esfandiar Shojaie, Alireza Soleymani, Sirous Faraji, Saeed Kalantari, Samaneh Bayrami, Mostafa Hosseini,
Volume 9, Issue 3 (6 2012)
Abstract
Background and Aim: The aim of this study was to assess the adherence to anti-retroviral prophylaxis after occupational and non-occupational exposure to human immunodeficiency virus (HIV) in patients consulting the Voluntary Counseling and Testing Center (VCT) of Imam Khomeini Hospital, Tehran during the period 2008 to 2009.
Materials and Methods: In this prospective study, patients were selected, the required information about them was recorded, and adherence to anti-retroviral drugs (including Ziduvudin, Lamivudin and Efavirens) was determined based on self-report by the patients. Eighty-nine exposed patients were followed monthly for 4 months, and in the case of low-adherence (less than 95%) they were asked for the reason(s) for noncompliance.
Results: Of the 89 patients, 55 were men (61.8%) and 34 (38/2%) were women with a mean age of 30.16± 8.39 years 47 participants (52.8%) were single and 42 (47.1%) married 27 subjects (30.3%) were physicians, 35 (39.3%) nurses and 27 (30.3%) had occupations outside the healthcare system. From among the 36 subjects (40.5%) who stopped the treatment, 24 (27.0%) stopped it correctly (that is, when the serological test proved to be negative), while 12 (13.4%) did not stop it on a sound basis. Fifty-three subjects (59.6%) completed the prophylaxis. Adherence was found to be significantly associated with age and marital status (p<0.05).
Conclusion: The main reason for stopping the prophylaxis (a negative serological test result of the resource patient) was more pronounced than previous studies, which indicates the higher availability of the resource patient.
