Figure 1

Test and retest scores on the MOS-Sleep Scale for the 4-week and 1-week recall periods. General population norms for the U.S. population (not adjusted for age and gender), shown as black horizontal bars, are provided for reference from Hays et al. [21] only for the 4-week recall period, since population norms have not been established for a 1-week recall period. * p = 0.0062 and † p = 0.01 for the difference between test and retest using paired t-tests.