Showing 5 results for Meta-Analysis
Kourosh Sayehmiri , Marzieh Beigom Bigdeli Shamloo, Marzieh Khataee, Forghan Rabiei Fakhr, Milad Azami,
Volume 6, Issue 3 (9-2016)
Abstract
Introduction: Lead exposure is considered as a global health problem. The irreparable harmful effects of this heavy metal on human have been proven in various studies. Comparing to general population, workers in related industries are more exposed to lead. Several studies have investigated lead occupational exposure and its biological evaluation in Iran; however there is no overall estimate. Thus, the present study was conducted to determine the occupational exposure to lead and its biological evaluation in Iranian workers, using systematic review and meta-analysis.
Material and Method: This study was carried out based on information obtained from databases including Magiran, Iranmedex, SID, Medlib, Trials Register, Scopus, Pubmed, Science Direct, Cochran, Embase, Medline, Web of Science, Springer, Online Library Wiley, and Google Scholar from 1991 to 2016, using standard key words. All of the reviewed papers which met the inclusion criteria have been evaluated. Data combination was performed according to Random Effects Model using Stata software version 11.1.
Result: In the 34 qualified studies, the mean blood lead level (BLL) concentration in Iranian workers was estimated 42.8µg/dl (95% CI: 35.15-50.49). The minimum and maximum BLL were belonged to west (28.348µg/dl) and center (45.928µg/dl) regions of Iran, respectively. Considering different occupations, the lowest mean value was reported in textile industry workers (12.3 µg/dl), while the highest value was for zinc-lead mine workers (72.6 µg/dl). Mean breathing air lead level of Iranian workers reported in 4 studies was estimated 0.23 mg/m3 (95% CI: 0.14-0.33).
Conclusion: According to the high concentration of BLL and breathing air, it is recommended to increase protective measures and frequent screening. Scheduled clinical and paraclinical examination should also be performed for workers.
Hamed Yarmohammadi, Seyed Hassan Niksima, Soudabeh Yarmohammadi, Alireza Khammar, Hossein Marioryad, Mohsen Poursadeqiyan,
Volume 9, Issue 3 (9-2019)
Abstract
Introduction: Work-related musculoskeletal disorders (WMSDs) are any disorders or injuries to the musculoskeletal system due to working procedure or conditions. WMSDs is one of the main causes of occupational injuries and disability in advanced and developing countries. The present study was conducted to evaluate the prevalence of musculoskeletal disorders in drivers in order to achieve complete results with high statistical power, using meta-analysis method.
Material and Methods: This study is a systematic review and meta-analysis. In this study, the articles extracted from national and international databases, including Scientific Information Database (SID), Science Direct, PubMed (using the word MESH), Pre Quest, Scopus, Google Scholar, Iran Medix, SID, and MedLib. The main keywords for the search were Prevalence، Musculoskeletal and Drivers. The time for selecting articles was from 2000 to 2017. Data were analyzed using meta-analysis (random effect model). I2 and Q indexes were used to calculate heterogeneity. All statistical analysis was performed using STATA 14 software.
Results: In this study, 22 articles were entered into the meta-analysis process. The sample size was 7706 people with mean of 350 people in each study. The prevalence of musculoskeletal disorders in different organs of drivers was as follows: 26.19% (CI: 38-14.30), 18.07% (CI: 25.99-10.16), and 5.75% (CI: 8.27-3.22) in neck, shoulder, wrist / hand, and elbow respectively. The highest prevalence was related to low back pain 41.63% (confindence Interval (CI): 33.09-50.17), and the lowest prevalence was related to elbow disorder 7.45% with (CI: 95.46-9.43). The significance level was set at 0.05.
Conclusion: The results of this study show that the prevalence of pains in the back, neck, and shoulder are high among drivers. Also, due to the high prevalence of predicting the incidence of impaired driving. in order to control and reduce these disorders, appropriate design of seats and equipment of vehicles, conducting periodic examinations of drivers,performing proper exercise, and considering adequate rest time in working hours are recommended. Ergonomics and occupational health education programs are also recommended to reduce the risk of developing musculoskeletal disorders associated with driving.
Masoud Mohammadi, Aliakbar Vaisi-Raygani, Rostam Jalali, Nader Salari,
Volume 10, Issue 2 (5-2020)
Abstract
Introduction: One of the most common psychiatric disorders in nurses is job stress. Regarding the inconsistency of the studies conducted in nurses working in Iran, the present structured review and meta- analysis study was conducted to determine the prevalence of job stress in nurses working in Iranian hospitals.
Materials and Methods: The present study is a systematic review and meta-analysis conducted during 2001-2017. Articles related to job stress were obtained by searching SID, MEDLINE (PubMed), Science direct, and Google Scholar databases, and data were analyzed using Comprehensive Meta-Analysis software.
Results: Having investigated 17 studies, the overall prevalence of Job stress in nurses working in Iranian hospitals was obtained 60% (48.1% - 70.7%: 95% confidence), meta-regression test was conducted to investigate the heterogeneity of meta-analysis results. It was reported that increasing sample size decreases the prevalence of Job stress (P <0.05).
Conclusion: Regarding the high prevalence of job stress among nurses working in Iranian hospitals, health policymakers have to take effective measures to remove and reduce the stress causes in nurses to reduce the prevalence of stress in nurses and enhance work efficiency.
Ehsan Bastami, Kourosh Sayehmiri, Tahereh Bastami, Behzad Cheraghizadegan,
Volume 10, Issue 3 (8-2020)
Abstract
Introduction: Burnout dimensions include the emotional exhaustion (EE), depersonalization (DP) and personal accomplishment (PA).
Materials and Methods: The information was obtained from searching standard Persian and English keywords in accessible databases including: Scopus, Magiran, SID, Science Direct and PubMed from database commencement to April 2017. Data Analysis was performed using Stata version 11.1., and p value was considered less than 0.05.
Results: In the systematic review 43 studies met the inclusion criteria, and 9456 people were evaluated. The prevalence of burnout was calculated in any of the three dimensions of burnout. The prevalence of the Emotional Exhaustion (EE) dimension of burnout was%36 (%95CI: 29-42), the Depersonalization (DP) dimension was%23 (%95CI: 18-29) and the Personal Accomplishment (PA) dimension was%46 (%95CI: 39-53). Based on the type of the job, the maximum prevalence of the EE, DP and PA dimensions was in librarians 67% (%95CI:40-93), university staff 51% (14-88) and dentists 72%(%95CI:65-79), respectively. Meta regression results showed that there was no significant relationship between the year of publication and the prevalence of burnout.
Conclusion: According to the prevalence of burnout in Iran and the high prevalence of the PA dimension, it is recommended to consider mediating strategies for reducing and controlling stressful occupational events and burnout in organizational schedule.
Parisa Farahmandian, Abdollah Mohammadian-Hafshejani, Abdolmajid Fadaei, Ramezan Sadeghi,
Volume 14, Issue 1 (3-2024)
Abstract
Introduction: Lung cancer is the second most common cancer in the world. Smoking occupational and environmental exposures are the most important causes of lung cancer. Cadmium is known as a human carcinogen due to its ability to increase lung cancer risk. This study estimates the general results of all studies on the relationship between cadmium and lung cancer.
Material and Methods: In the present study, studies that evaluated the relationship between cadmium and lung cancer until May 2022 were searched and retrieved. From the funnel plot to determine the existence of diffusion skew, from the statistical tests Chi-squared test (x2) and I2 to determine heterogeneity, from the meta-regression method to identify the root of heterogeneity, and from the sensitivity analysis approach to identify the effect of each study on the result, it was generally used. This study performed all analyses with Stata statistical software version 15.
Results: In this study, it was observed that the chance of developing lung cancer compared to the base group, in the people exposed to a higher dose than the base level of cadmium is equal to 1.31 (95% CI: 1.06-1.62; p-value = 0.024), which is statistically significant. Based on Egger’s test (p-value = 0.178) and Begg’s (p-value = 0.276), no diffusion bias was observed in this study.
Conclusion: ccording to the final results of this review research, exposure to cadmium leads to a 31% increase in lung cancer risk, which is statistically significant. Therefore, cadmium is a risk factor for lung cancer.
