Abstract

Background: Nowadays, 24-h performance is an inevitable part in many industries and public services. Night work is a necessity for employees of a main part of labor force. Shift work is considered as working out of usual working hours (about 7-18). Objective: The aim of this study is drowsiness trend in night workers and adaptation to night shift in hospital staff. Materials and Methods: We used panel method. The studied society belongs to one of the hospitals in Iran. Ninety staffs were selected as samples. To collect sleepiness, data from Stanford Sleepiness Scale demographic information and questionnaire were utilized. The data were analyzed by SPSS software version 22. Results: Results show two identical groups of samples have largest degrees over four nights at 5: 00 then at 3: 00 AM and 1: 00 AM. The degree of correspondence of second night was more than the first night. Conclusion: These landings can have important applications in increasing the safety and productivity of the workplace and the workers.