Five-Year Epidemiological Study and Estimation of Accidents Distribution in Construction Industry Workers in Yazd City by the Year 2011 by Applying Time Series Model

Abstract: Background & Aims: Occupational accidents are known as one of the most important causes of disabilities and mortality in developed and developing countries. Construction industry is one of the most high risk occupations which its hazardous are not known completely. In addition to occupational accidents, construction workers are faced many diseases factors such as asbestos, silicon, fumes and noises. The aim of this research was an epidemiological study and determination of a model for estimating accidents of instructor industry by the year 2011 in Yazd city. Methods: This study is a descriptive, analytical and distribution modeling. The questionnaire contained the variables of age, occupation, type of accident, injured part and the results of accident. Results: In this research 247 construction workers injured along five years in Yazd were studied. Most of the injured workers had worked less than one year (34.8%) and 12.55% had worked more than 20 years. Fatal rate of workers with no insurance was significantly more than those who had insurance (p<0.01). The most prevalent accident was falling (48.58%) and the less was chocking (2%). The highest level of injury was in hands and feet (27.53%) followed by head injury (22.27%). The relationships of accident results with occupation and also part of body were statistically significant (P<0.001). More than 51% of head injuries lead to death. After testing many models, time series model of quadratic form was found to be the closest model to the trend of data. Conclusion: According to time series model estimation, with this trend the rate of occupational injuries would be more than 300 cases by the year 2011 and this recommends serious measures for prevention. Keywords: Accidents, Time Series Analysis, Construction Worker

Survey of noise exposure and permanent hearing loss among Shadris spinning factory workers of Yazd using Task Base Method (TBM)

Background and aims  During last decades one of the hazardous agents on workers health has been workplaces noise. The aim of this study was to investigate the level of noise exposure in different jobs and noise induced permanent threshold shift in relation to noise level and work experience.   Methods  This is a cross-sectional and descriptive study that performed among total workers. Dosimetry was done for determination of accurate noise exposure level during an eight-hour s shift for each job group. Audiometry was performed in a standard acoustic room by the audiologist. The obtained data was analyzed by means of SPSS software.   Results  Mean of age was 36.58 ± 6.76(19-52 years) and minimum, maximum and mean of work experience were 1 , 18 , 11.08 ± 5.47 respectively. Mean of hearing loss was 15.38 ±8.63 in right ear and 16.31 ±9.51 in left ear and total hearing loss was 14.72 ±8.33. A significant relationship was also identified between noise intensity and work experience with hearing loss (Pvalue?).   Conclusion  Findings of this study indicated that there is a high prevalence of noise pollution in different parts of workplace. Considering the obtained results, that shows positive effect  of noise and work experience on hearing loss,  the necessity of  improvement of control  and protection measures is of prime importance