Effects of an email delivered cognitive behavioral therapy for insomnia in college students

Psychosocial factors of insomnia in depression: a network approach

BACKGROUND

Insomnia symptoms in patients with major depressive disorder (MDD) are common and deleterious. Childhood trauma, personality traits, interpersonal distress, and social support contribute to insomnia, but how they interact to affect insomnia remains uncertain.

METHODS

A total of 791 patients with MDD completed the Insomnia Severity Index, Eysenck Personality Questionnaire, Interpersonal Relationship Comprehensive Diagnostic Scale, Childhood Trauma Questionnaire, Social Support Rating Scale and Hamilton Depression Scale-17. This study utilized network analyses to identify the central symptoms of insomnia and their associations with psychosocial factors.

RESULTS

Worrying about sleep was identified as the central symptom in the insomnia network, insomnia and associated personality network, insomnia and associated interpersonal disturbance network, insomnia and associated childhood trauma network, insomnia and associated social support network, and the integrated network of insomnia symptoms and associated psychosocial factors. In the networks of insomnia symptoms and individual psychosocial factors, most psychosocial factors (other than childhood trauma) were directly or indirectly related to insomnia symptoms; however, neuroticism was the only factor directly associated with insomnia symptoms before and after controlling for covariates. In the final integrated network of insomnia symptoms and psychosocial factors, neuroticism was a bridge node and mediated the relationships of social support and interpersonal disturbances with insomnia symptoms, which is clearly presented in the shortest pathways.

CONCLUSIONS

Worrying about sleep and neuroticism were prominent in the integrated network of insomnia symptoms and associated psychosocial factors, and the edge between them connected psychosocial factors and insomnia symptoms in MDD patients.

The role of behaviour-change theory in sleep interventions with emerging adults (aged 18-29 years): a systematic review and meta-analysis

Previous systematic reviews and meta-analysis of sleep interventions with young adults have not reached consensus on what contributes to their efficacy. Behaviour-change theories may influence the efficacy of interventions; hence, the aim of this research was to investigate the role of such theories in sleep interventions with this population. Six electronic databases and reference lists were searched (April-May 2021) for published sleep behaviour-change interventions with emerging adults (aged 18-29 years) that used control groups. A selection of 20 studies fulfilled the inclusion criteria, but only six were based on behaviour-change theories. Meta-analysis was run with eight studies, as the others had a high risk of bias or did not present the necessary data to calculate Hedges' g. The estimation of a random effects model for the studies showed a small effect in the sleep quality of the participants in the experimental group (g = -0.26; 95% confidence interval -0.42 to -0.09), with low levels of heterogeneity (I2  = 21%), and a small 95% prediction interval (-0.59 to 0.08). Although we could not examine theory or any other moderators of the effect, a qualitative analysis of the behaviour-change techniques present in the interventions leads us to hypothesise that there is not a direct link between behaviour-change techniques and the success of the intervention. Other characteristics of the interventions may be linked to their variable levels of efficacy and should be investigated in the future, as for now there are no answers as to what the key is for successful sleep interventions.

Longitudinal relationships among perceived stress, suicidal ideation and sleep quality in Chinese undergraduates: A cross-lagged model

BACKGROUND

Sleep quality is an important indicator of quality of life. It is of importance to investigate the risk factors and potential consequences of poor sleep quality, such as perceived stress and suicidal ideation. We therefore investigated the longitudinal and reciprocal relationships among perceived stress, suicidal ideation, and sleep quality.

METHODS

A three-wave longitudinal survey was conducted from June 2019 to June 2020 at six-month intervals in undergraduate students (N = 197, 58.9% female) in China. The participants completed self-report questionnaires in classroom settings.

RESULTS

While the levels of perceived stress were stable, levels of suicidal ideation and sleep quality fluctuated significantly over time. There were significant reciprocal relationships between perceived stress and suicidal ideation from T1 to T3. In addition, the reciprocal relationships between suicidal ideation and sleep quality from T1 to T2 were also significant. Suicidal ideation at T2 partially mediated the relationship between perceived stress at T1 and sleep quality at T3 (indirect effect: β=0.06, 95% CI: 0.04 to 0.10, p<0.001), and suicidal ideation at T2 fully mediated the relationship between sleep quality at T1 and perceived stress at T3 (indirect effect: β=0.48, 95% CI: 0.30, 0.70, p<0.001).

LIMITATIONS

The subjects' educational background is single, and the measurement method is self-report measures.

CONCLUSIONS

Suicidal ideation may play a significant role in explaining the longitudinal relationships between perceived stress and sleep quality. And suggest the importance of early identification and treatment of suicidal ideation among Chinese undergraduates.