الفهرس 
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Abstract
Musculoskeletal disorders (MSD) are considered one of the most common causes of contact in primary care and the most common causes of disability and long-term sick leave in several countries (Bremander, 2008).
People with musculoskeletal disorders can play an important role in the management of their disease. They are recommended to use a wide variety of health educational programs (Masiero et al., 2007). Health education aims to influence health behaviors of individuals suffering MSD as well as to address factors that influence these behaviors (Klaber-Moffett, 2002).
The musculoskeletal disorders are very common among employees with different physical demands; awkward working postures and sedentary life. Long days spent in unsuitable office chairs put the body under an immense amount of strain causing many things from tension in the shoulders to extreme knee and lower back problems (Brady et al., 2003).
The aim of this work was to study the problem of musculoskeletal disorders among Zagazig University employees and try to improve their health status.
This study was carried out among Zagazig University office employees over a period of nine months from first of September 2010 to the end of May 2011. It was formed of two phases; in the first phase cross section of office employees answered the standardized Nordic questionnaire (Kuorinka et al., 1987) to determine prevalence and pattern of distribution of MSD among them.
The second phase was a randomized controlled trial in which employees screened with the most common MSD were randomly allocated into two groups. Both groups received an initial physician evaluation, subsequent treatment as determined by physicians, a follow-up physician visits.
The first group is the intervention group [who were given the health education intervention] and the second one is control group [who were not given the health education intervention] and comparing knowledge and health outcome of both groups using pretests and posttests for health education message and Health Assessment Questionnaire Disability index (HAQ-DI) (Bruce and Fries, 2003) respectively at the start and end of study.
The results in the current study showed that, 83.1% of Zagazig University office employees were suffering from MSD during the last year with higher prevalence of MSD among females (91.9%).
The highest percentage of these employees (56.2%) had been suffering low back musculoskeletal troubles followed by those who had knee musculoskeletal troubles (47.8%) then shoulder and neck pain ( 32.7% and 28.5% respectively). The lowest percentages were MSD of elbow and wrists/ hands (10.9% and 11.7% respectively).
large percentage of office workers continue going to work with musculoskeletal pains in lower back, neck and shoulders and do not pay much attention to them. More than half of them did not consult physician and the majority of them had reduced their leisure activities because of pains while less than half of them reduced their work activities.
There were high significant improvements in the knowledge of intervention group after the health education intervention regarding all aspects of LBP, while the knowledge of control group was not significantly changed at the end of study except for clinical picture and methods of treatment of LBP and for the correct way of sitting and reaching to high elevated objects.
When comparing the improvements in knowledge of both groups at the end of study it was found that, there were high significant differences in favour to the intervention group.
Regarding the impact of health education on the health outcome of both.