Table 1.
Description of the study sample (n = 634).
Table 2.
Item endorsement frequencies of the Sleep Condition Indicator (n = 634).
Table 3.
Item score distribution and inter-item correlations.
Table 4.
Exploratory factor analysis of the Sleep Condition Indicator (SCI).
Fig 1.
ROC curve of SCI and ISI as proxy gold standard.
Area under curve = 0.94, sensitivity = 86%, specificity = 90% when J = 0.75. Scores has been reversed for the ROC-curve so that both ISI and SCI score in the same direction.