“…We used Pub-Med's controlled vocabulary terms (MeSH) and Medline's multi-field search for insomnia AND treatment, insomnia AND management, and insomnia AND therapy as well as the individual keywords sedatives, hypnotics, CBT-I, mindfulness, meditative movement, zolpidem, benzodiazepines, eszopiclone, doxepin, orexin, suvorexant, sleep tracking devices, insomnia treatment, and personal activ- efficiency or the percentage of time asleep out of time spent in bed, fatigue, mood, and overall daytime functioning. [53][54][55][56] The largest of these RCTs looked at 164 adults with chronic insomnia who were randomized to one of three arms: cCBT-I, imagery relief therapy (IRT: placebo), or treatment as usual (TAU). A sustained improvement in sleep efficiency was seen after six weeks of treatment with cCBT-I (20%) compared with TAU (6%; Cohen's d=0.95) and IRT (6%; Cohen's d=1.06), and this improvement was maintained eight weeks after treatment ended (20% v 7% for IRT (Cohen's d=1.00) and 9% for TAU (Cohen's d=0.69)).…”