Table 5 shows that the mean score of the components of activity level, general productivity, social outcomes, and vigilance of FOSQ as well as the total FOSQ score were significantly higher among workers without shifts than those with shifts.
As shown in table 7, after control for confounding, single workers versus married, non-smoker workers versus smokers, workers reside inside Khamis versus those reside outside Khamis and those having lower PSQI versus those having higher PSQI score had significantly better functional outcome of sleep All together were responsible for 42% variability of the FOSQ score (r-square = 0.42).
The results of this study demonstrated an inverse relationship between the quality of sleep and the functional outcomes scores among factory workers (For PSQI, greater score indicates a "poor" sleeper while for FOSQ, lower scores are associated with greater dysfunction).
The Functional Outcomes of Sleep Questionnaire (FOSQ) total score was about 15 in each group.
Results showed that the mean adjusted improvement in FOSQ total score between baseline and 3 months was identical in the two groups, at 1.79 points.