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. 2014 Jun 15;10(6):603–611. doi: 10.5664/jcsm.3780

Figure 3. Pittsburgh Sleep Quality Index (PSQI) measures between workers in workplaces with windows (N = 22) and without windows (N = 27).

Figure 3

Workers with windows in the workplace reported better overall global score on the PSQI (A) compared to workers with no windows in the workplace. The difference in global score is made up mainly of differences in sleep disturbances (B), daytime dysfunction (C), and sleep efficiency (D), with workers without windows reporting poorer scores than workers with windows on all three PSQI subscores. * p < 0.05, † p < 0.10.