Introduction
The treatment of insomnia comprises considering its quality and intensity first and then searching for its causes to begin the treatment. Compared to pharmacotherapy, cognitive therapy is inexpensive and has fewer side effects. Recent findings on cognitive-behavioral therapy (CBT) strongly support this method for treating insomnia. Evidence indicates that this treatment is beneficial for primary insomnia and patients whose insomnia is caused by psychiatric disorders or chronic diseases. CBT for insomnia targets the maladaptive behaviors and thoughts that lead to insomnia or its progress.
Accordingly, and considering the importance of regulating emotion and dysfunctional beliefs about sleep on individuals’ mental health and performance, this study aims to investigate the effects of CBT for insomnia on emotion regulation and dysfunctional beliefs about sleep in individuals with insomnia. The primary question of this study is as follows: does CBT affect the regulation of emotion and dysfunctional beliefs about sleep in individuals with insomnia?
Methods
A case and control group were examined in this experimental study with pretest-post-test and follow-up. The statistical population included all the patients with insomnia who visited the sleep disorders laboratory of Rasoul Akram Hospital and two private clinics with psychiatrists with a sleep fellowship in Tehran City, Iran in 2020. The patients were selected through convenient sampling and were diagnosed with insomnia through the interview by the psychologist and the sleep medicine fellow according to the Diagnostic and Statistical Manual of Mental Disorders, 5th edition (DSM-5). Subsequently, of 36 patients with insomnia, 20 patients were randomly selected as the statistical sample, 10 were grouped in the case group (cognitive-behavioral therapy for insomnia [CBT-I]) and 10 in the control group.
Results
The frequency of male and female participants in the CBT-I group was 6 and 4, respectively, and the frequency for control group participants was 7 and 3, respectively. In addition, the participants in the CBT-I and the control group are shown in the following table based on their age. According to the results of the analysis of covariance (ANCOVA) test, controlled with the effect of pretest scores for the studied variables, the difference between the weighted mean of the two groups in both post-test and follow-up was statistically significant for all of the variables (
Table 1).
Discussion
The ANCOVA results indicated that CBT-I influenced emotion regulation and dysfunctional beliefs about sleep in patients with insomnia. It significantly increased emotion regulation (P<0.05) and significantly decreased the dysfunctional beliefs about sleep (P<0.05). Moreover, the results showed a significant increase (P<0.05) in emotion regulation and a significant decrease (P<0.05) in the scores of dysfunctional sleep beliefs in patients with insomnia in the post-test and follow-up stages compared to the pretest. The literature review elaborated on the connection between this study and the previous research conducted on a similar subject. It should be noted that the results of this study were in line with the studies conducted by Vanek et al. (2020) [
21], Gencarelli et al. (2020) [
33], Yensusong (2021), Khazaei, and Zakiee (2019) [
27], Hertenstein et al. (2019) [
28], and Rezaei et al. (2016) [
29].
Gencarelli et al. (2020) examined the relationship between action time, sleep intensity, and dysfunctional beliefs about sleep [
33]. He demonstrated a negative correlation between sleep intensity and dysfunctional beliefs about sleep and reaction time. Sleep impacts emotion regulation in both normal individuals and those who suffer from mental disorders. Several studies have indicated a connection between pre-bed positive and negative emotion activation and amplification of sleep emotional excitement disrupting sleep. On the other hand, many studies have demonstrated that low-quality sleep and sleep deprivation negatively impact adults’ emotional functioning.
Khazaei et al. (2019) studied the effectiveness of acceptance and commitment therapy (ACT) on emotion regulation and sleep quality problems in patients with chronic insomnia [
27]. The results specified that ACT increased the sleep quality of patients with insomnia, and it also helped with emotion regulation problems.
Emotion regulation strategies are the activities that individuals employ to tackle stressful situations and unfortunate incidents. CBT is based on behavioral therapy, which stands at the heart of traditional psychotherapy and shows the therapists’ interest in restructuring cognition as an effective factor in emotions and behaviors. This training method aims to correct irrational opinions, dysfunctional beliefs, misinterpretations and cognitive biases, the sense of control over life, facilitating constructive self-talk, and underpinning coping skills.
Studies have indicated that patients with insomnia reported more negative thoughts during night awakenings compared to individuals with normal sleep. Furthermore, pre-bed negative cognitions (for instance, thoughts about not sleeping) could lead to increased sleep problems. These pre-bed dysfunctional cognitions are called dysfunctional beliefs about sleep. Some researchers have focused on the intrusive thoughts during the night and others on the core beliefs and attitudes, potentially carrying an emotional load, about sleep deprivation during day and night.
Ethical Considerations
Compliance with ethical guidelines
This study has ethical approval from the Ahvaz Branch, Islamic Azad University (IR.IAU.AHVAZ.REC.1399.051) and the ethical code of the Iranian Clinical Trials Registration (IRCT) (IRCT20210714051894N1)
Funding
This article taken from the PhD Thesis Masoomeh Yarahmadi, Department of Health Psychology, Khorramshahr International Branch, Islamic Azad University and has no Financial Support.
Authors contributions
Conceptualization, Research, Review, Editing and finalization: Masoomeh Yarahmadi. Supervision: Fariba Hafezi and Behnam Makvandi.
Conflicts of interest
The Authors Declared no Conflict of interest.
Acknowledgements
Hereby, as part of a doctoral thesis, the authors of this study thank all individuals who contributed to it, including the Research Deputy of the Persian Gulf Branch, Islamic Azad University and all participating patients with insomnia disorder.
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