Figure 1

Illustration of the potential superiority of sleep continuity measures over conventional sleep analysis. The two hypnograms are similar as concerns the amount of sleep and awakening index. Only sleep continuity measures such as time spent in short naps of 10- to 30-minute duration (24 minutes (80% of sleep time) in hypnogram A versus 0 minutes [0%] in hypnogram B) or time spent in bouts of less than 10 minutes (6 minutes (20%) in A versus 30 minutes (100%) in B) could differentiate the two hypnograms.