Introduction: Medical resident workload has been shown to be associated with learning efficiency and patient satisfaction. However, there is limited evidence about it in developing countries. This study aimed to evaluate the medical resident workload in a multidisciplinary teaching hospital in Tehran, Iran. Methods: All medical residents at Shariati Hospital, a teaching hospital affiliated with Tehran University of Medical Science, who were working between November and December 2011 were enrolled in this cross-sectional study. A self–reported questionnaire was used to gather information about their duty hours (including daily activities and shifts) and financial issues. Results:135 (52.5%) out of 257 residents responded to the questionnaire. 72 (53.3%) residents were in surgical departments and 63 (46.7%) were in non-surgical departments. Mean duty hours per month were significantly higher in surgical (350.8 ±76.7) than non-surgical (300.6±74.2) departments (p=0.001). Three cardiology (a non-surgical group) residents (5.7%) and 30 residents (41%) in surgical groups (p<0.001) declared a number of “on-calls in the hospital” more than the approved number in the curriculum. The majority of residents (97.8%) declared that their salary was not sufficient to manage their lives and they needed other financial resources. Conclusion: Medical residents at teaching hospitals in Iran suffer from high workloads and low income. There is a need to reduce medical resident workload and increase salary to improve worklife balance and finances.
The noise pollution produced by various aircraft systems, including hydraulic, pneumatic, electrical systems and auxiliary aircraft equipment inside the aircraft hangars, generally cause hearing impairment and mental disorder of shift and office personnel. Identifying hangar noise pollutants can lead to find solutions and methods to deal with the contaminants in the aviation industry. In the first phase of the research, the sound study in each specified region of the hangar, the required measurements and frequency analysis are done to determine the type of sound control appropriate for the hangar. Measurements in this study were conducted in accordance with standards, and the results of the measurements and equilibrium calculations after recording were compared with the permissible exposure limits in accordance with the Occupational Exposure Limit values. The results show that the highest sound pressure level corresponds to sheet metal activities (128 dBC) and thereafter respectively, pneumatic systems (112 dBC), hydraulic pumps (104 dBC) and electrical systems (86 dBA), and found that noise pollution of the hangar during the specified time for shift and office personnel is higher than the permissible limits, and this exposure is harmful to the physical and mental health of the staff. In the second phase of the research, by the results of statistical analysis of the questionnaires, there was a significant relationship between the result of estimating noise intensity and the extent of its annoyance by shift and office personnel, which most people in the hangar believe that this level of noise pollution is very annoying.
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