Natural light exposure (hours/4-week cycle) of groups of workers according to light exposure.
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Abstract
<p><sup>a</sup> Alternating morning/afternoon shifts</p><p><sup>b</sup> Alternating morning/afternoon/night shifts</p><p><sup>c</sup> Starting time before 06:00 h</p><p><sup>d</sup> Starting time after 06:00 h</p><p><sup>e</sup> Weighted averages according to the number of work days and number of days-off</p><p>* Difference mean between work days and days-off within group, P<0.01</p><p>Natural light exposure (hours/4-week cycle) of groups of workers according to light exposure.</p