Iran Occupational Health

  Background and Aims : Sleep is one of the most important day and night cycles and a complex biological pattern . It is necessary for humans physical and mental balance as sleep disturbance is often an early sign of mental illness. The purpose of this study is to survey and comparison of sleep disorders in shift workers of an automotive industry.

  Methods : This descriptive- analytical study has been conducted on 120 workers in an automobile manufacturing industry located in Tehran. Samples are selected using simple sampling. Data collection was included three questionnaires, demographic data, Insomnia Severity Index and Epworth Sleepiness Scale. The research data were analyzed using SPSS software.

  Results: Insomnia Severity Index scores 16.3 on the night shift with a standard deviation of 6 and 12.55 in the morning with a standard deviation of 5. T-test results showed that the severity of insomnia is higher in unmarried than married individuals (P =.004).Comparison scores on the night and morning shifts, using t- test, show that the average sleepiness scores in night shift is higher than morning shift, and is statistically significant (P =.048).