Fig. 1

Meeting and measurement protocol. The figure illustrates the structure of the SCREENS trial in days regarding scheduled meetings, as well as the timing of exposure and outcome measurements. The program is structured such that baseline and follow-up commence on the same day of the week, so the data will be collected on the same days. Note that the only difference between baseline and follow-up is that at baseline a test sleep measurement is included during the first night. The 1st meeting (not shown ) is a mandatory information meeting, prior to the trial. The figure is re-used from an earlier publication (see acknowledgements)