Fig 1.
The effects of the CBT-I-based smartphone app (former NUKKUAA®, now Sleep²) on sleep were assessed subjectively via questionnaires (at T0 and T2) as well as a sleep diary every morning and objectively via a heart-rate sensor during the study. HR sensor – heart rate sensor.
Table 1.
Overview over the contents of the app program divided by level [28].
Table 2.
Sociodemographic information, participant flow, engagement, and compliance.
Table 3.
Summary of the screened symptoms at baseline (t0) for completers (n = 160).
Table 4.
Summary of the program evaluation.
Table 5.
Changes in mental health symptoms after the sleep intervention (n = 160 completers).
Table 6.
Changes in continuous sleep measures from pre (t1) to post (t2) intervention.