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Forest plot for the short- and long-term effects of dCBT-i on subjective sleep quality (SQ). Subjective SQ was evaluated using the Pittsburgh Sleep Quality Index (PSQI; Morris et al., 2015 [30]; Fucito et al., 2017 [44]), Insomnia Severity Index (ISI; Freeman et al., 2017 [43]), or Holland Sleep Disorder Questionnaire-Insomnia (HSDQi; De Bruin et al., 2018 [45]). SD, standard deviation; CI, confidence interval.
