Help-seeking behaviors for insomnia in Hong Kong Chinese: a community-based study

Repeated electrical vestibular nerve stimulation (VeNS) reduces severity in moderate to severe insomnia; a randomised, sham-controlled trial; the modius sleep study

BACKGROUND

Insomnia is a prevalent health concern in the general population associated with a range of adverse health effects. New, effective, safe and low-cost treatments, suitable for long-term use, are urgently required. Previous studies have shown the potential of electrical vestibular nerve stimulation (VeNS) in improving insomnia symptoms, however only one sham-controlled trial has been conducted on people with chronic insomnia.

OBJECTIVES

/Hypothesis: Repeated VeNS delivered by the Modius Sleep device prior to sleep onset will show superior improvement in Insomnia Severity Index (ISI) scores over a 4-week period compared to sham stimulation.

METHODS

In this double-blinded, multi-site, randomised, sham-controlled study, 147 participants with moderate to severe insomnia (ISI≥15) were recruited and allocated a VeNS or a sham device (1:1 ratio) which they were asked to use at home for 30 min daily (minimum 5 days per week) for 4 weeks.

RESULTS

After 4 weeks, mean ISI score reduction was 2.26 greater in the VeNS treatment group than the sham group (p = 0.002). In the per protocol analysis, the treatment group had a mean ISI score decrease of 5.8 (95 % CI [-6.8, -4.81], approaching the clinically meaningful threshold of a 6-point reduction, with over half achieving a clinically significant decrease. Furthermore, the treatment group showed superior improvement to the sham group in the SF-36 (Quality of Life) energy/fatigue component (PP p = 0.004, effect size 0.26; ITT p = 0.006, effect size 0.22).

CONCLUSIONS

Modius sleep has the potential to provide a viable, non-invasive and safe clinically meaningful alternative treatment option for insomnia.

Insomnia symptom prevalence in England: a comparison of cross-sectional self-reported data and primary care records in the UK Biobank

OBJECTIVES

We aimed to use a large dataset to compare self-reported and primary care measures of insomnia symptom prevalence in England and establish whether they identify participants with similar characteristics.

DESIGN

Cross-sectional study with linked electronic health records (EHRs).

SETTING

Primary care in England.

PARTICIPANTS

163 748 UK Biobank participants in England (aged 38-71 at baseline) with linked primary care EHRs.

OUTCOME MEASURES

We compared the percentage of those self-reporting 'usually' having insomnia symptoms at UK Biobank baseline assessment (2006-2010) to those with a Read code for insomnia symptoms in their primary care records prior to baseline. We stratified prevalence in both groups by sociodemographic, lifestyle, sleep and health characteristics.

RESULTS

We found that 29% of the sample self-reported having insomnia symptoms, while only 6% had a Read code for insomnia symptoms in their primary care records. Only 10% of self-reported cases had an insomnia symptom Read code, while 49% of primary care cases self-reported having insomnia symptoms. In both primary care and self-reported data, prevalence of insomnia symptom cases was highest in females, older participants and those with the lowest household incomes. However, while snorers and risk takers were more likely to be a primary care case, they were less likely to self-report insomnia symptoms than non-snorers and non-risk takers.

CONCLUSIONS

Only a small proportion of individuals experiencing insomnia symptoms have an insomnia symptom Read code in their primary care record. However, primary care data do provide a clinically meaningful measure of insomnia prevalence. In addition, the sociodemographic characteristics of people attending primary care with insomnia were consistent with those with self-reported insomnia, thus primary care records are a valuable data source for studying risk factors for insomnia. Further studies should replicate our findings in other populations and examine ways to increase discussions about sleep health in primary care.

Effects of cognitive behavioural therapy and bright light therapy for insomnia in youths with eveningness: study protocol for a randomised controlled trial

BACKGROUND

Insomnia and eveningness are common and often comorbid conditions in youths. While cognitive behavioural therapy for insomnia (CBT-I) has been suggested as a promising intervention, it remains unclear whether it is sufficient to also address circadian issues in youths. In addition, despite that light has been shown to be effective in phase-shifting one's circadian rhythm, there has been limited data on the effects of bright light therapy and its combination with CBT-I on sleep and circadian outcomes in youths. The current protocol outlines a randomised controlled trial that examines the efficacy of CBT-I and CBT-I plus bright light therapy (BLT) in reducing insomnia severity, improving mood symptoms and daytime functioning (e.g. sleepiness, fatigue, cognitive function), and improving subjective and objective sleep and circadian measures compared to a waitlist control group.

METHODS

We will carry out a randomised controlled trial (RCT) with 150 youths aged 12-24 who meet the criteria of insomnia and eveningness. Participants will be randomised into one of three groups: CBT-I with bright light therapy, CBT-I with placebo light, and waitlist control. Six sessions of CBT-I will be delivered in a group format, while participants will be currently asked to use a portable light device for 30 min daily immediately after awakening throughout the intervention period for bright light therapy. The CBT-I with light therapy group will receive bright constant green light (506 lx) while the CBT-I with placebo light group will receive the modified light device with the LEDs emitting less than 10 lx. All participants will be assessed at baseline and post-treatment, while the two active treatment groups will be additionally followed up at 1 month and 6 months post-intervention. The primary outcome will be insomnia severity, as measured by the Insomnia Severity Index. Secondary outcomes include self-reported mood, circadian, daytime functioning, and quality of life measures, as well as sleep parameters derived from actigraphy and sleep diary and neurocognitive assessments. Objective measures of the circadian phase using dim-light melatonin onset assessment and sleep parameters using polysomnography will also be included as the secondary outcomes.

DISCUSSION

This study will be the first RCT to directly compare the effects of CBT-I and BLT in youths with insomnia and eveningness. Findings from the study will provide evidence to inform the clinical management of insomnia problems and eveningness in youths.

TRIAL REGISTRATION

ClinicalTrials.gov NCT04256915. Registered on 5 February 2020.

Validity and reliability of the sleep health index among patients with spinal degenerative diseases

OBJECTIVE

To test the validity and reliability of the Sleep Health Index (SHI) in a Chinese clinical sample, and thereby provide more evidence for the assessment of sleep health in future research and clinical practice.

METHODS

This study used a cross-sectional design. A convenient sample of 265 participants with spinal degenerative diseases was recruited from outpatient clinics. The SHI, Pittsburgh Sleep Quality Index (PSQI), Insomnia Severity Index (ISI), Epworth Sleepiness Scale (ESS), Patient Health Questionnaire-9 (PHQ-9), Visual Analogue Scale (VAS), and EuroQoL 5-Dimension 5-Level (EQ-5D-5L) were administered via REDCap. Structural, concurrent, convergent, known-group validity, internal consistency, and test-retest reliability were evaluated.

RESULTS

Confirmatory factor analysis confirmed a 3-factor structure (sleep duration, sleep quality, and disordered sleep). The overall SHI score had a high correlation with PSQI and ISI (r = -0.62 and -0.70, respectively) as well as a moderate correlation with PHQ-9 (r = -0.50, p<0.001). The overall SHI was significantly associated with VAS, ESS, and EQ-5D-5L (r = -0.15 to -0.23, p<0.05). Participants with pain had a lower score on the sleep quality sub-index than those without (p<0.001). Those with chronic diseases had a significantly lower score on the sleep duration sub-index than those without (p<0.05). Those with depression, poor sleep quality, and insomnia had lower scores on the overall scale and the three sub-indices than those without (p<0.05). The overall SHI showed acceptable internal consistency (Cronbach's α = 0.74) and test-retest reliability (intraclass correlation coefficient = 0.73).

CONCLUSIONS

The Chinese version of SHI showed good validity and acceptable reliability and could be used to assess sleep health among clinical populations.

Evaluating the Efficacy of Electrical Vestibular Stimulation (VeNS) on Insomnia Adults: Study Protocol of a Double-Blinded, Randomized, Sham-Controlled Trial

Insomnia is a common health problem in the general population. There are different ways to improve sleeping habits and quality of sleep; however, there is no clinical trial using transdermal neurostimulation to treat individuals with symptoms of insomnia in Asia. This gives us the impetus to execute the first study in Asia which aims to evaluate the efficacy of Electrical Vestibular Stimulation (VeNS) on individuals with insomnia in Hong Kong. This study proposes a two-armed, double-blinded, randomized, sham-controlled trial including the active VeNS and sham VeNS group. Both groups will be measured at baseline (T1), immediately after the intervention (T2), and at the 1-month (T3) and 3-month follow-up (T4). A total of 60 community-dwelling adults aged 18 to 60 years, with insomnia symptoms will be recruited in this study. All subjects will be computer randomized into either the active VeNS group or the sham VeNS group on a 1:1 ratio. All subjects in each group will receive twenty 30-min VeNS sessions during weekdays, which will be completed in a 4-week period. Baseline measurements and post-VeNS evaluation of the psychological outcomes (i.e., insomnia severity, sleep quality and quality of life) will also be conducted on all participants. The 1-month and 3-month follow-up period will be used to assess the short-and long-term sustainability of the VeNS intervention. For statistical analysis, a mixed model will be used to analyze the repeated measures data. Missing data will be managed by multiple imputations. The level of significance will be set to p < 0.05. Significance of the study: The results of this study will be used to determine whether this VeNS device can be considered as a self-help technological device to reduce the severity of insomnia in the community setting. We registered this clinical trial with the Clinical trial government, identifier: NCT04452981.

Cross-cultural adaptation and validation of the Chinese version of the Sleep Health Index

OBJECTIVE

To generate the Chinese Sleep Health Index (SHI-C) in Mandarin with cross-cultural adaptations and test its psychometric properties.

METHODS

This study used a cross-sectional design. Health science students were included (N = 271) and a sub-set (n = 74) was invited for the re-test. Cross-cultural adaptation of the SHI-C was performed prior to formal validation. The SHI-C, Pittsburgh Sleep Quality Index (PSQI), Insomnia Severity Index (ISI), Bedtime Procrastination Scale, and Sleep Hygiene Index were used to measure variables of interest. Exploratory factor analysis was used to evaluate the structure validity. Bivariate analyses were used to evaluate the construct validity.

RESULTS

Exploratory factor analysis identified 3 factors (ie, sleep quality, sleep duration, and disordered sleep) accounting for 55.6% of the total variance. The SHI-C total and sleep quality sub-index scores were significantly associated with both PSQI global score (r = -0.132, p < .05; r = -0.182, p < .01, respectively) and ISI score (r = -0.655, p < .05; r = -0.820, p < .05, respectively). SHI-C total, sleep quality sub-index, and sleep duration sub-index scores were significantly associated with Bedtime Procrastination Scale and Sleep Hygiene Index scores (r = -0.238 to -0.368, p < .05). Students with insomnia (ISI > 9) or poor sleep quality (PSQI > 5) had significantly lower SHI-C scores than those without (73.5 vs. 89.0, p < .01; 84.1 vs. 86.7, p < .05, respectively). SHI-C showed good internal consistency (Cronbach's alpha = 0.73) and test-retest reliability (intraclass correlation coefficient = 0.82).

CONCLUSIONS

The SHI-C demonstrated good validity and adequate reliability in a Chinese sample of health science students. It could be used to measure sleep health in future research and practice. Psychometric properties of the SHI-C among other Chinese populations remain to be confirmed.

The Effect of Zao Ren An Shen Capsule on Insomnia among Patients with Anxiety: A Randomized Controlled Trial

Background. Zao Ren An Shen capsule (ZRASC) is one of the most widely used Chinese herbal medicine (CHM) in treating insomnia, but its effect on insomnia patients with anxiety remains unclear. We aimed to examine the effect of ZRASC combined with alprazolam in anxiety patients compared with those only with alprazolam prescription. Methods. We conducted a single-blind, parallel-group, randomized trial involving persons from 2 hospitals in China. Participants were randomly assigned in a 1 : 1 ratio to the intervention group, in which the participants were provided with ZRASC and alprazolam, or to the control group, in which the participants were provided with alprazolam. The primary outcomes were insomnia symptoms measured by the insomnia severity index (ISI). The secondary outcomes were anxiety symptoms measured with the Hamilton anxiety rating scale (HAMA). All participants were followed up at 2-week and 4-week after the treatment. The effect was estimated using the mixed-effect models. Results. A total of 334 patients were enrolled in the trial. 167 of them (mean (SD) age, 44.4 (12.8) years; 43.1% female) were assigned to the usual treatment group, while 167 (mean (SD) age, 46.0 (13.4) years; 43.7% female) were assigned to the ZRASC group. From baseline to the 4-weekfollow-up, the mean differences in ISI and HAMA scores between the ZRASC group and the usual care group were −2.542 and −2.563, respectively (both $p<0.001$ ). Patients in the ZRASC group were more likely to have remission of insomnia and anxiety than those in the control group at the 4-weekfollow-up, with incidence rate ratios of 265% and 213%, respectively (both $p<0.001$ ). Proportions of remission were 74.93% ( $p<0.001$ ) for insomnia and 85.80% ( $p<0.001$ ) for anxiety at 4-weekfollow-up. Conclusions. This randomized study showed that adjunctive treatment with ZRASC was able to reduce insomnia and anxiety symptoms at the 4-weekfollow-up. Trial Registration. This study was registered in the Chinese Clinical Trial Registry (ChiCTR1800019913).

Gender differences in the prevalence of and trends in sleep patterns and prescription medications for insomnia among US adults, 2005 to 2018

BACKGROUND

Evidence indicates that the burden of sleep disorders is increasing, yet recent trends have not been examined.

OBJECTIVE

To examine the prevalence of and trends in sleep patterns and medications commonly used for insomnia (MCUFI) in US adults from 2005 through 2018.

METHODS

A total of 39,749 participants aged 20 years or older from 7 consecutive National Health and Nutrition Examination Survey cycles during 2005-2018 were included.

RESULTS

The age-standardized prevalence of trouble sleeping and using MCUFI was higher in women than men, but men tended to sleep less (sleep duration <7 hours) and were more likely to have sleep disorders. The temporal trends in sleep disorders and MCUFI were similar in men and women, except that trouble sleeping increased more in men (P = 0.024). The prevalence of insufficient sleep decreased from 33.6% in women and 38.1% in men in 2005-2006 to 20.5% in women and 28.6% in men in 2017-2018. The prevalence of MCUFI use was 13.3% in women and 8.9% in men in 2005-2006, peaked at 15.2% for men and 17.0% for women in 2013-2014, and decreased slightly in 2015-2018.

CONCLUSION

The prevalence of trouble sleeping and MCUFI use was higher in women, while the prevalence of short sleep duration and sleep disorders was higher in men. Sleep disorders, abnormal sleep duration, and MCUFI use increased at a broadly similar pace in men and women, except that trouble sleeping increased more in men.

Evaluation of an occupation-based sleep program for people with Insomnia

Background

Sleep problems are a health issue worldwide. Based on the Person-Environment-Occupation-Performance model, we developed an occupation-based sleep programme to promote awareness of sleep hygiene factors, promote an environment conductive to sleep, and restructure participation in daytime activities with a focus on occupational balance.

Method

This study uses a non-equivalent group design to evaluate the effectiveness of an occupation-based sleep intervention among community-dwelling adults with insomnia, when compared with a treatment-as-usual (TAU) group which focused on sleep hygiene, and relaxation.

Results

When compared with the TAU group ( n = 20), the intervention group ( n = 22) had significant improvement in sleep duration, occupational balance, and reduction in mood symptoms at both post treatment and 1-month follow up.

Conclusion

The results demonstrated that an occupation-based programme is an effective treatment for insomnia disorder and demonstrated the role which occupational therapy could play in primary health care service.

The effects of an integrated mindfulness-based tai chi chuan programme on sleep disturbance among community-dwelling elderly people: protocol for a randomized controlled trial

Background

Many elderly individuals who experience sleep disturbances would consider complementary and alternative medicine as an alternative therapeutic option in light of the limitations of traditional treatments. Mindfulness-based interventions (MBIs) and Tai Chi Chuan (TCC) are two alternative forms of complementary and alternative medicine. They both share the common feature of a focus on breathing but represent distinct approaches with different mechanisms and philosophical orientations. The trial described in this protocol aims to evaluate the effects of an integrated form of mindfulness-based Tai Chi Chuan (MBTCC) programme and the underlying mechanisms of the beneficial effects over a 12-month follow-up.

Methods

The planned study is a four-armed randomized controlled trial with repeated measures. A total of 256 community-dwelling older adults with sleep problems will be recruited and randomized into four groups: (1) an MBTCC group, (2) an MBI group, (3) a TCC group, and (4) a sleep hygiene education (SHE) control group. The outcome measures in terms of insomnia severity, interoception, sleep-wake pattern, health status, rumination, and hyperarousal level will be collected at four time points: at baseline (T1), after the 8-week intervention (T2), 6 months after the intervention (T3), and 1 year after the intervention (T4). In addition, qualitative evaluation through focus group interviews will be conducted at the end of the 12-month assessment period (T4).

Discussion

This trial will illuminate the synergetic effect of combining both MBIs and TCC on optimizing improvements in sleep disturbance. The findings from this study can provide empirical support for this integrated treatment, which provides an alternative for healthcare professionals in elderly service to select appropriate practices to treat elderly people with sleep disturbance. It can further help to lessen the growing public health burden of sleep disturbances among the elderly living in the community.

Trial registration

ClinicalTrials.gov. NCT05396092. Published on 24 May 2022

Who reports insufficient and disturbed sleep? Results from a representative population-based health survey in Hong Kong

OBJECTIVES

To highlight the prevalence of sleep problems and identify associated risk factors among a representative sample recruited from the general population of Hong Kong.

DESIGN, SETTING AND PARTICIPANTS

Participants included 12 022 individuals (aged 15 or above) who took part in the Population Health Survey 2014/15, a territory-wide survey conducted by the Department of Health of the Government of the Hong Kong Special Administrative Region.

PRIMARY AND SECONDARY OUTCOME MEASURES

Outcomes were the prevalence of (1) insufficient sleep (<6 hours sleep per day) and (2) any sleep disturbance (difficulty initiating sleep, intermittent awakenings, early awakening) ≥3 times per week in the past 30 days. Multivariable logistic regression identified associations between sleep problems and sociodemographic, clinical and lifestyle factors.

RESULTS

9.7% of respondents reported insufficient sleep and 10.5% reported sleep disturbances ≥3 times a week. Female gender, monthly household income <$12 250 (Hong Kong dollar), lower education level, mental health condition and physical health condition were significantly associated with both insufficient and disturbed sleep (all p<0.05). Unemployment, homemaker, insufficient physical activity, current/former smoking status and harmful alcohol consumption were associated with sleep disturbances only (all p<0.01).

CONCLUSIONS

Sleep problems are highly prevalent in Hong Kong. As such problems are associated with a range of health conditions, it is important to facilitate improvements in sleep. Our results show that harmful alcohol consumption, insufficient physical activity and current smoking are modifiable risk factors for sleep disturbances. Public health campaigns should focus on these risk factors in order to promote a healthy lifestyle and ultimately reduce sleep disturbances. Targeted interventions for high-risk groups may also be warranted, particularly for those with doctor-diagnosed physical and mental health conditions.

Effect of Culturally Tailored, Internet-Delivered Cognitive Behavioral Therapy for Insomnia in Black Women: A Randomized Clinical Trial

IMPORTANCE

Black women are at risk for insomnia disorder. Despite interest in addressing sleep health disparities, there is limited research investigating the efficacy of criterion-standard treatment (cognitive behavioral therapy for insomnia [CBT-I]) among this racial minority population.

OBJECTIVE

To compare the efficacy of a standard version of an internet-delivered CBT-I program, a culturally tailored version, and a sleep education control at improving insomnia symptoms.

DESIGN, SETTING, AND PARTICIPANTS

In this single-blind, 3-arm randomized clinical trial, participants in a national, longitudinal cohort (Black Women's Health Study [BWHS]) were recruited between October 2019 and June 2020. BWHS participants with elevated insomnia symptoms were enrolled and randomized in the current study.

INTERVENTIONS

Participants were randomized to receive (1) an automated internet-delivered treatment called Sleep Healthy Using the Internet (SHUTi); (2) a stakeholder-informed, tailored version of SHUTi for Black women (SHUTi-BWHS); or (3) patient education (PE) about sleep.

MAIN OUTCOMES AND MEASURES

The primary outcome was insomnia severity (Insomnia Severity Index [ISI]). Index score ranged from 0 to 28 points, with those scoring less than 8 points considered to not have clinically significant insomnia symptoms and a score of 15 points or higher suggesting insomnia disorder. An ISI score reduction of more than 7 points was considered a clinically significant improvement in insomnia symptoms. The SHUTi-BWHS program was hypothesized to be more effective at significantly decreasing insomnia severity compared with the SHUTi program and PE.

RESULTS

A total of 333 Black women were included in this trial, and their mean (SD) age was 59.5 (8.0) years. Those randomized to receive either SHUTi or SHUTi-BWHS reported significantly greater reductions in ISI score at 6-month follow-up (SHUTi: -10.0 points; 95% CI, -11.2 to -8.7; SHUTi-BWHS: -9.3 points; 95% CI, -10.4 to -8.2) than those randomized to receive PE (-3.6 points; 95% CI, -4.5 to -2.1) (P < .001). Significantly more participants randomized to SHUTi-BWHS completed the intervention compared with those randomized to SHUTi (86 of 110 [78.2%] vs 70 of 108 [64.8%]; P = .008). Participants who completed either intervention showed greater reductions in insomnia severity compared with noncompleters (-10.4 points [95% CI, -11.4 to -9.4] vs -6.2 points [95% CI, -8.6 to -3.7]).

CONCLUSIONS AND RELEVANCE

In this randomized clinical trial, both the SHUTi and SHUTi-BWHS programs decreased insomnia severity and improved sleep outcomes more than PE. The culturally tailored SHUTi-BWHS program was more effective at engaging participants with the program, as a greater proportion completed the full intervention. Program completion was associated with greater improvements in sleep.

TRIAL REGISTRATION

ClinicalTrials.gov Identifier: NCT03613519.

Efficacy of Email-delivered Versus Face-to-face Group Cognitive Behavioral Therapy for Insomnia in Youths: A Randomized Controlled Trial

PURPOSE

The purpose of the study was to compare the efficacy of group-based therapy (GT) and email-delivered self-help (ESH) cognitive behavioral therapy for insomnia (CBT-I) with the wait-list (WL) control group in youths.

METHODS

The study involved an assessor-blind, parallel group randomized controlled trial in youths meeting the diagnostic criteria for insomnia disorder. Participants were randomized to one of the three groups (8-week GT, 8-week ESH, or WL). Participants in all three groups were assessed at baseline and after treatment (week 9 for the WL group). The two treatment groups were additionally assessed at one month and six months after the intervention. Treatment effects were examined using linear mixed models.

RESULTS

A total of 135 youths (mean age: 20.0 ± 2.5 years, female: 67.4%) were recruited. After treatment, both active treatment groups showed significant improvements in insomnia symptoms (GT vs. WL: Cohen's d = -1.03, ESH vs. WL: d = -.63), less presleep arousal (d = -.52 to -1.47), less sleep-related dysfunctional belief (d = -.88 to -1.78), better sleep hygiene practice (d = -.79 to -.84), and improved daytime functioning (d = -.56 to -.96) compared with the WL group. In addition, GT outperformed ESH in improving maladaptive sleep-related beliefs and mood symptoms at post-treatment and 6-month follow-up. A reduction of suicidality with moderate effect size favoring GT emerged at 6-month follow-up.

DISCUSSION

Our findings suggested that both group-based and email-delivered CBT-I were effective in treating youth insomnia, but group-based CBT-I showed superior effects on reducing maladaptive beliefs and mood symptoms.

Elevated Prevalence of Probable Insomnia among Young Men during Social Unrest in Hong Kong: A Population-Based Study

OBJECTIVE/BACKGROUND

Hong Kong has experienced a series of major protests in 2019, leading to deteriorating population mental health. Few studies have documented the impact of social unrest on sleep health. The present study examined the prevalence of probable insomnia and its demographic correlates in a population-based random sample of Hong Kong adults.

PARTICIPANTS AND METHODS

A population-based cross-sectional telephone survey on lifestyle behaviors was conducted during the period between July and September 2019. Data obtained from 1004 participants who completed the insomnia measure were analyzed. The Chinese version of the Patient-Reported Outcomes Information System (PROMIS) v1.0 Sleep Disturbance Short Form was used to measure insomnia. Logistic regressions were conducted to evaluate if prevalence estimates differed by demographic variables.

RESULTS

The weighted prevalence of probable insomnia for the population was 20.7%, a nearly twofold increase compared to a prior population-based study in Hong Kong. A novel age by sex interaction was found (p = .046). Men had significantly greater odds of having probable insomnia than women in the 18-39 age group (M = 23.1 vs W = 16.5%), whereas women had greater odds of probable insomnia in the 40-59 (M = 14.8 vs W = 25.6%) and 60+ groups (M = 17.2 vs W = 25.2%).

CONCLUSION

The present findings documented in a random population-based sample elevated prevalence of probable insomnia among Hong Kong adults, especially young men, during the social unrest in 2019. Easily accessible and scalable intervention is urgently needed to mitigate the potential impact of continued social unrest on deteriorating sleep health facing Hong Kong adults.

Primary care is the frontline for help-seeking insomnia patients

BACKGROUND

Although insomnia is a very common disorder, few people seek medical help.

OBJECTIVES

To determine the proportion of people who consult a healthcare professional about insomnia and examine reasons for help seeking.

METHODS

Descriptive study of 99 patients diagnosed with insomnia following a telephone survey of 466 adults assigned to a primary healthcare unit in Majorca (Spain). Data were obtained from interviews and subsequent review of electronic medical records.

RESULTS

Thirty-nine patients (39.8%) consulted at least once with one health care professional; 36(92.2%) consulted a general practitioner. Only 12.2% had an insomnia diagnosis registered in their medical record. Insomnia consultation was not associated with any sociodemographic variables analysed, anxiety, depression or comorbidities. Also, there was no association with sleep quality, duration, and sleep efficiency. Patients with clinical insomnia (OR, 2.48; 95% CI, 1.03-5.94), those who were more worried (OR, 2.93; 95% CI 1.08-7.95) or felt that others noticed the impact of insomnia on their quality of life (OR, 2.48; 95% CI, 1.02-19.08) are more likely to seek medical help. Patients taking sleep medication were 21.54 (95% CI, 7.34-63.20) times more likely to have asked for medical assistance.

CONCLUSION

Insomnia is an under-reported problem for both patients and doctors. When patients decide to consult for insomnia problems, they first go to the GP, and the vast majority take medications for their sleep problem. Those who consult most are people with more severe insomnia and those who are more worried.

Sleep Disturbances and the Risk of Incident Suicidality: A Systematic Review and Meta-Analysis of Cohort Studies

OBJECTIVE

The association between sleep disturbances and suicidality is not well understood partly because of the variability in research results. This meta-analysis aimed to investigate the predictive value of sleep disturbances for incident suicidality.

METHODS

A systematic search was conducted in PubMed, EMBASE, PsycINFO, and Web of Science databases for studies examining sleep disturbances and incident suicidality. Cohort studies were screened following a registered protocol, and the eligible ones were meta-analyzed.

RESULTS

Seven studies comprising 1,570,181 individuals at baseline, with 1407 attempting suicide and 1023 completing suicide during follow-up, were included. Individuals with baseline sleep disturbances had a significantly higher incidence of suicidality than did those without (relative risk = 2.17, 95% confidence interval [CI] = 1.45-3.24, I2 = 82.50%, p < .001). The risk of an incident suicide attempt was 3.54-fold higher (95% CI = 3.07-4.09, I2 = 0%, p = .44), whereas the risk of incident completed suicide was 1.80-fold higher (95% CI = 1.32-2.44, I2 = 59.33%, p = .01) in individuals with baseline sleep disturbances.

CONCLUSIONS

Incident suicide attempts and deaths are higher among people with sleep disturbances. Regular screening and preventive measures should be undertaken for people with sleep disturbances to prevent progression into suicide attempts and deaths.Clinical Trial Registration:CRD42019136397.

Psychometric properties of the Chinese version of the Pittsburgh Sleep Quality Index (PSQI) among Hong Kong Chinese childhood cancer survivors

Background

Sleep disruption is a prevalent symptom reported by survivors of childhood cancer. However, there is no validated instrument for assessing this symptom in this population group. To bridge the literature gap, this study translated and adapted the Pittsburgh Sleep Quality Index (PSQI) for Hong Kong Chinese cancer survivors and examined its psychometric properties and factor structure.

Methods

A convenience sample of 402 Hong Kong Chinese childhood cancer survivors aged 6–18 years were asked to complete the Chinese version of the PSQI, Center for Epidemiologic Studies Depression Scale for Children (CES-DC), Fatigue Scale-Child (FS-C)/Fatigue Scale-Adolescent (FS-A), and Pediatric Quality of Life Inventory (PedsQL). To assess known-group validity, 50 pediatric cancer patients and 50 healthy counterparts were recruited. A sample of 40 children were invited to respond by phone to the PSQI 2 weeks later to assess test–retest reliability. A cutoff score for the translated PSQI used with the survivors was determined using receiver operating characteristic analysis.

Results

The Chinese version of the PSQI had a Cronbach alpha of 0.71, with an intraclass correlation coefficient of 0.90. Childhood cancer survivors showed significantly lower mean PSQI scores than children with cancer, and significantly higher mean scores than healthy counterparts. This reflected that childhood cancer survivors had a better sleep quality than children with cancer, but a poorer sleep quality than healthy counterparts. We observed positive correlations between PSQI and CES-DC scores and between PSQI and FS-A/FS-C scores, but a negative correlation between PSQI and PedsQL scores. The results supported that the Chinese version of the PSQI showed convergent validity. Confirmatory factor analysis showed that the translated PSQI data best fit a three-factor model. The best cutoff score to detect insomnia was 5, with a sensitivity of 0.81 and specificity of 0.70.

Conclusion

The Chinese version of the PSQI is a reliable and valid instrument to assess subjective sleep quality among Hong Kong Chinese childhood cancer survivors. The validated PSQI could be used in clinical settings to provide early assessments for sleep disruption. Appropriate interventions can therefore be provided to minimize its associated long-term healthcare cost.

Trial registration This study was registered in ClinicalTrials.gov with the reference number NCT03858218.

Effects of aromatherapy on sleep disorders: A protocol for systematic review and meta-analysis

BACKGROUND

The progress of modern society and changes in lifestyle have not only increased the proportion of sub-healthy people, but also caused many people to suffer from sleep disorders and mental anxiety. Long-term lack of high-quality sleep will not only cause psychological problems such as anxiety and fatigue, but also cause physical abnormalities, such as abnormal hormone secretion, weakened immunity, neuroendocrine disorders, and high blood pressure. Therefore, the purpose of this study is to systematically evaluate the effectiveness of aromatherapy in improving sleep quality in people with sleep disorders.

METHODS

Computer search CNKI, SinoMed, Wanfang, PubMed, Web of science, and EMbase collect randomized controlled trials on aromatherapy to improve sleep quality of people with sleep disorders. The search time limit is to build the database until April 5, 2021. RevMan5.3 software is used for meta-analysis.

RESULTS

This systematic review will provide an assessment of the current state of sleep disorders, aiming to assess the efficacy of aromatherapy for patients with sleep disorders.

CONCLUSION

This systematic review will provide a credible evidence-based for the clinical treatment of sleep disorders with aromatherapy.

A Prevention Program for Insomnia in At-risk Adolescents: A Randomized Controlled Study

OBJECTIVES

To prevent the future development of insomnia in at-risk adolescents.

METHODS

A randomized controlled trial comparing 4 weekly insomnia prevention program with a nonactive control group. Subjects were assessed at baseline, postintervention, and 6 and 12 months after intervention. Assessors were blinded to the randomization. Analyses were conducted on the basis of the intention-to-treat principles.

RESULTS

A total of 242 adolescents with family history of insomnia and subthreshold insomnia symptoms were randomly assigned to an intervention group (n = 121; mean age = 14.7 ± 1.8; female: 51.2%) or control group (n = 121; mean age = 15.0 ± 1.7; female: 62.0%). There was a lower incidence rate of insomnia disorder (both acute and chronic) in the intervention group compared with the control group (5.8% vs 20.7%; P = .002; number needed to treat = 6.7; hazard ratio = 0.29; 95% confidence interval: 0.12-0.66; P = .003) over the 12-month follow-up. The intervention group had decreased insomnia symptoms (P = .03) and reduced vulnerability to stress-related insomnia (P = .03) at postintervention and throughout the 12-month follow-up. Decreased daytime sleepiness (P = .04), better sleep hygiene practices (P = .02), and increased total sleep time (P = .05) were observed at postintervention. The intervention group also reported fewer depressive symptoms at 12-month follow-up (P = .02) compared with the control group.

CONCLUSIONS

A brief cognitive behavioral program is effective in preventing the onset of insomnia and improving the vulnerability factors and functioning outcomes.

Non-pharmacological Approaches for Management of Insomnia

Insomnia is a prevalent sleep problem associated with a constellation of negative health-related outcomes and significant socioeconomic burden. It commonly co-occurs with psychiatric and medical conditions, which may further exacerbate these comorbid conditions and hinder treatment response. There is much empirical evidence to support the clinical efficacy of non-pharmacological treatment for insomnia, especially cognitive behavioral therapy for insomnia (CBT-I), in managing insomnia in a wide range of populations. This article reviews the research on the efficacy of CBT-I for primary insomnia and insomnia comorbid with other psychiatric and medical conditions, the empirical evidence regarding different CBT-I treatment modalities, the implementation of CBT-I across different age groups, and some initial evidence on the sequential combination of insomnia treatments. A brief overview of other non-pharmacological treatment with regard to complementary alternative medicine is also provided.

The effectiveness of diaphragmatic breathing relaxation training for improving sleep quality among nursing staff during the COVID-19 outbreak: a before and after study

OBJECTIVES

Recent studies have demonstrated that first-line nurses involved in the coronavirus disease-2019 (COVID-19) crisis may experience sleep disturbances. As breathing relaxation techniques can improve sleep quality, anxiety, and depression, the current study aimed to evaluate the effectiveness of diaphragmatic breathing relaxation training (DBRT) for improving sleep quality among nurses in Wuhan, China during the COVID-19 outbreak.

METHODS

This study used a quasi-experimental (before and after) intervention strategy, with 151 first-line nurses from four wards in Leishenshan hospital. The Pittsburgh Sleep Quality Index (PSQI), Self-Rating Anxiety Scale (SAS), and Self-Rating Depression Scale (SDS) to evaluate the effectiveness of DBRT before and after the intervention. Data were examined using the Shapiro-Wilk test, Levene's test, and paired t-test.

RESULTS

A total of 140 nurses completed the DBRT sessions. First-line nurses achieved significant reductions in global sleep quality (p < 0.01), subjective sleep quality (p < 0.001), sleep latency (p < 0.01), sleep duration (p < 0.001), sleep disturbances (p < 0.001), habitual sleep efficiency (p = 0.015), daytime dysfunction (p = 0.001), and anxiety (p = 0.001). There were no significant reductions in the use of sleeping medication (p = 0.134) and depression (p = 0.359).

CONCLUSION

DBRT is a useful non-pharmacological treatment for improving sleep quality and reducing anxiety among first-line nurses involved in the COVID-19 outbreak. The study protocol was clinically registered by the Chinese Clinical Trial Registry.

CLINICAL TRIAL REGISTRATION NUMBER

ChiCTR2000032743.

Further Reduction in Help-Seeking Behaviors Amidst Additional Barriers to Mental Health Treatment in Asian Populations: A Contemporary Review

Under diagnosis and treatment of mental health illnesses lead to chronic presentations and consequences. Multiple factors contribute to gaps in treatment, including the role culture plays in the development or suppression of help-seeking behaviors (HSBs). In the Asian community, conversation and recognition of mental health and its disorders are considered shameful. This review presents an analysis of literature to identify barriers to mental health treatment pronounced in Asian populations and discusses how culture influences these barriers and treatment-seeking behaviors, particularly in the context of the Asian-origin Coronavirus disease 2019 (COVID-19) global pandemic. It is the purpose of this review to discuss Asian American underutilization of mental health services and understand the factors the contribute to psychiatric care resistance in Asian communities.

Treating depression with a smartphone-delivered self-help cognitive behavioral therapy for insomnia: study protocol for a parallel group randomized controlled trial

Background

Depression is a major public health concern. Emerging research has shown that cognitive behavioral therapy for insomnia (CBT-I) is effective in treating individuals with comorbid insomnia and depression. Traditional face-to-face CBT-I encounters many obstacles related to feasibility, accessibility, and help-seeking stigma. CBT-I delivered via smartphone application could be a potential solution. This paper reports a protocol designed to evaluate the efficacy of a self-help smartphone-based CBT-I, using a waitlist group as control, for people with major depression and insomnia.

Methods

A two-arm parallel randomized controlled trial is conducted in a target sample of 285 non-suicidal Hong Kong Chinese older than 17 years of age with major depression and insomnia. Participants complete an online rapid screening, followed by a telephone diagnostic interview. Those who meet the eligibility criteria are randomized in a ratio of 1:1 to receive either CBT-I immediately or to a waitlist control condition. The CBT-I consists of six weekly modules and is delivered through a smartphone application proACT-S. This smartphone app has been pilot tested and revamped to improve user experience. An online randomized algorithm is used to perform randomization to ensure allocation concealment. The primary outcomes are changes over the measurement points in sleep quality, insomnia severity, and depression severity. The secondary outcomes include changes over the measurement points in anxiety, subjective health, treatment expectancy, and acceptability of treatment. Assessments are administered at baseline, post-intervention, and 6-week follow-up. The recruitment is completed. Important adverse events, if any, are documented. Multilevel linear mixed model based on intention-to-treat principle will be conducted to examine the efficacy of the CBT-I intervention.

Discussion

It is expected that proACT-S is an efficacious brief sleep-focused self-help treatment for people with major depression and insomnia. If proven efficacious, due to its self-help nature, proACT-S may be applicable as a community-based early intervention, thereby reducing the burden of the public healthcare system in Hong Kong.

Trial registration

ClinicalTrials.gov NCT04228146. Retrospectively registered on 14 January 2020.

A critical review of self-care for sleep disturbances: prevalence, profile, motivation, perceived effectiveness and medical provider communication

Objective

This study aims to undertake the first critical review of self-care use among adults with sleep disturbances by focusing on the prevalence of self-care—the self-determined and self-administered use of products or practices—by adults with sleep disturbances.

Methods

A comprehensive search of 2006–2016 international literature in CINAHL, AMED, Medline and EMBASE databases was conducted. The search was confined to empirical research findings regarding sleep disturbances - as indicated by a validated sleep scale/index or clinician diagnosis.

Results

Of the 21 articles included in this review, only three reported on sleep disturbances other than insomnia disorder (ID) or insomnia symptoms (IS). Overall, a high prevalence of self-care use is reported among adults with sleep disturbances, particularly for ID and IS. Self-care products and practices are more likely to be used by adults with sleep disturbances, than those without sleep disturbances. Commonly used self-care products and practices include OTC hypnotics, antihistamines, diphenhydramine products, diet, exercise, painkillers, herbal medicines, vitamins, minerals and dietary supplements, yoga, tai chi, Qigong, meditation, exercise and relaxation.

Conclusions

Many adults with sleep disturbances–particularly ID or IS–frequently use self-care products and practices. Self-care products are also used concomitantly with conventional prescription medications without disclosure to medical professionals. The current literature is of varied methodological caliber, frequently relies on small sample sizes and low-quality data collection therefore further rigorous health services research is required. There is an especial paucity of data regarding self-care for sleep disturbances such as restless legs syndrome and obstructive sleep apnea. Healthcare providers may find it beneficial to actively ask patients about their use of self-care for sleep disturbances to help avoid harmful drug-drug or drug-herb interactions.

The Prevalence of Sleep Disturbances and Sleep Quality in Older Chinese Adults: A Comprehensive Meta-Analysis

Objective: This is a meta-analysis of the pooled prevalence of insomnia-specific sleep disturbances (sleep disturbances thereafter) and sleep quality in older Chinese adults. Method: Both English (PubMed, Embase and PsycINFO) and Chinese (Chinese National Knowledge Infrastructure [CNKI], WanFang and SinoMed) databases were systematically searched. Data extraction and quality assessment were independently performed by two investigators. Random-effects model was performed to pool the prevalence of sleep disturbances and sleep quality. Subgroup and meta-regression analyses were performed to explore the source of heterogeneity. Funnel plots, Egger's regression model, and Begg's test were used to assess publication bias. Results: A total of 47 studies were included. The pooled prevalence of sleep disturbances was 35.9% (95% CI: 30.6%-41.2%). Older adults in rural areas had higher prevalence of sleep disturbances than their counterparts in urban areas. Sleep quality was measured by the Pittsburgh Sleep Quality Assessment (PSQI) in all studies with available data. In the 27 studies with available data, the pooled mean PSQI total score was 6.64 (95% CI: 6.14-7.13). There was no significant difference between genders and between rural and urban areas. Compared to men, women had higher mean scores in sleep latency (Q = 23.62, p < 0.001), sleep efficiency (Q = 12.08, p = 0.001), and use of sleep-promoting medications (Q = 4.07, p = 0.044). Conclusion: Sleep disturbances are common in older Chinese adults, particularly in older women.

Impact of Sleep Disorders and Other Factors on the Quality of Life in General Population: A Cross-Sectional Study

The study objective was to assess if insomnia, along with other factors, can impact the physical and mental quality of life (QOL) of the Lebanese general population. This cross-sectional study, conducted between November 2017 and March 2018, enrolled 756 community-dwelling participants. A first linear regression, using the SF-12 PCS score as the dependent variable, showed that having a family history of insomnia problems (β = 1.107, p = 0.026) was significantly associated with higher physical QOL (higher SF-12 PCS score), whereas increased stress (β = 0.048, p = 0.015) was significantly associated with lower physical QOL. A second linear regression, using the SF-12 MCS score as dependent variable, showed that having increased age (β = -0.079, p < 0.001) was significantly associated with lower mental QOL. Despite its cross-sectional design and the modest sample size, this study adds to the evidence that insomnia, along with other factors (including sociodemographic and psychological factors), can have a detrimental impact on both physical and mental QOL of participants.

The Association of Unreported Sleep Disturbances and Systemic Inflammation: Findings from the 2005-2008 NHANES

BACKGROUND/OBJECTIVE

Sleep apnea is associated with elevated inflammatory markers. A subgroup of patients never report sleep disturbances to their physician. The inflammatory status of this subgroup is not known. The present study aims to evaluate two inflammatory markers, C-reactive protein (CRP) and red cell distribution width (RDW), in those with unreported sleep disturbances and compares these findings to those with and without reported sleep disorders. We also investigate the utility of RDW as an inflammatory marker in sleep disorders.

METHODS

Sample includes 9,901 noninstitutionalized, civilian, nonpregnant adults from the 2005-2008 National Health and Nutrition Examination Survey, a nationally representative, cross-sectional U.S. study. Sleep questionnaire and laboratory data were used to compare inflammatory markers (CRP and RDW) in five subgroups of individuals: reporting physician-diagnosed sleep apnea, reporting another physician-diagnosed sleep disorder, reported sleep disturbance to physician with no resulting diagnosis, unreported sleep disturbance (poor sleep quality not reported to physician), and no diagnosed sleep disorder or sleep disturbance.

RESULTS

Individuals with unreported sleep disturbance had significantly higher odds of elevated RDW (>13.6%) when compared to those without a sleep disturbance in adjusted models (OR=1.33). Those with unreported sleep disturbance had significantly higher odds of elevated CRP levels (>1 mg/L) than those without sleep disturbances (OR 1.34), although the association was not significant when adjusted for obesity and other controls.

CONCLUSION

Self-identified unreported sleep disturbances are associated with significantly higher odds of elevated RDW than those without sleep disturbances. RDW may serve as a valuable indicator in identifying individuals at higher risk for sleep apnea and other sleep disorders.

Sex Differences in Insomnia: from Epidemiology and Etiology to Intervention

PURPOSE OF REVIEW

Insomnia is approximately 1.5 times more common in women than in men. To date, research has advanced our knowledge about why women report significantly more sleep problems than men despite not being reflected in objective sleep measures. Precisely understanding the symptomatology and pathological mechanisms underlying sex differences is important for prevention and providing appropriate interventions.

RECENT FINDINGS

Sex differences found in insomnia goes beyond simple explanations and have been proven to be a complicated interplay of biological, psychological, and social factors that play different roles throughout the life span. This paper will review sex differences in insomnia based on risk factors, mechanisms, and consequences, as well as treatment response. In addition, we will also discuss treatment recommendations when working with female populations at different stages in the life span that may be more vulnerable to insomnia. Future studies utilizing prospective, longitudinal designs are needed to understand the interactions of various factors that can explain existing sex differences in insomnia.

Occupational Therapy Practice in Sleep Management: A Review of Conceptual Models and Research Evidence

The effectiveness of sleep intervention developed by occupational therapists was reviewed, and a conceptual framework for organizing the developing practice of sleep management in occupational therapy was proposed in this paper. Evidence-based articles on sleep management practice in occupational therapy from 2007 to 2017 were retrieved. Four types of effective sleep management intervention were identified from the literature, including the use of assistive devices/equipment, activities, cognitive behavioral therapy for insomnia, and lifestyle intervention, and the use of assistive device was the most popular intervention. Applying the Person-Environment-Occupation Performance (PEOP) framework, we developed a conceptual framework for organizing occupational therapy practice in sleep management. The future development of occupation-based sleep intervention could focus on strategies to (1) minimize the influence of bodily function on sleep, (2) promote environment conducive to sleep, and (3) restructure daytime activity with a focus on occupational balance.

Adaptation of the Pittsburgh Sleep Quality Index in Chinese adults with type 2 diabetes

BACKGROUND

Sleep disturbance is a major health issue in people with type 2 diabetes (T2DM). The Pittsburgh Sleep Quality Index (PSQI) has been the most widely used instrument to measure subjective sleep disturbance. Nevertheless, its factor structure in the context of T2DM has not been examined. The purpose of the study is to evaluate the factor structure of the PSQI in Chinese adults with T2DM and thereby to facilitate its use in clinical practice and research.

METHODS

The PSQI (Chinese version) was administered to 240 patients with T2DM. Confirmatory factor analysis was conducted to examine the one-factor, adapted one-factor by removing the component "use of sleep medication", and the three-factor structure of the PSQI. Goodness-of-fit indices were used to evaluate the fit of the model. Construct validity of the resultant model was further examined using contrasted groups. Cronbach's α of the resultant model was obtained to evaluate its internal consistency.

RESULTS

The three-factor model proposed by Cole et al. did not fit the sleep data. Confirmatory factor analysis supported the adapted one-factor model with the PSQI global score as an indicator of overall sleep quality, and the goodness-of-fit indices for the adapted model were better compared to the original one-factor model. As expected, women, older adults, and patients with poor glycemic control had higher adapted PSQI global score (p < 0.01). Cronbach's α of the adapted PSQI was 0.78.

CONCLUSION

The adapted PSQI was similar to the original PSQI in that only the component "use of sleep medication" was removed from the original scale and the one-factor scoring worked better. In contrast, the three-factor model has limited usefulness in this population.

Patient preference and choice of healthcare providers in Shanghai, China: a cross-sectional study

OBJECTIVES

This study aimed to assess patients' healthcare-seeking preferences in mild, chronic, and serious illness; identify influential factors; and examine the reasons underlying patients' healthcare-seeking preference.

DESIGN

A retrospective study.

SETTING

The study was conducted in 14 tertiary hospitals in Shanghai, China.

PARTICIPANTS

Questionnaires were distributed to 1519 patients, and 1114 were completed and returned. All patients participated in the study voluntarily, provided written informed consent, and possessed the ability to complete the questionnaire.

MAIN OUTCOME MEASURES

We measured and compared preferences and choice of healthcare providers in patients if they had experienced mild, chronic, or serious illness.

RESULTS

More than 50% of participants, including those who were >60 years of age, had consulted a doctor more than three times during the preceding year, were single, and were most likely to decide not to seek medical treatment. Community health facilities were the most frequently selected healthcare provider in mild illness. In addition, patients who had no personal preference, did not express a preference for a good environment or first-class medical technology, were concerned about close proximity and short waiting times, and pursued low medical costs were most likely to choose a community health facility. General hospitals were the most frequently selected healthcare provider in chronic and serious illness. In addition, patients who earned higher monthly incomes, did not pursue low medical costs, were not concerned about short waiting times or close proximity, and expressed a preference for first-class medical technology, were most likely to choose general hospitals.

CONCLUSION

Patients' healthcare-seeking preference was influenced mainly by healthcare providers' characteristics, illness severity, and sociodemographic characteristics. These findings indicate that patients' current healthcare-seeking preference was not ideal and requires optimisation.

A population-based 2-year longitudinal study of insomnia disorder in a Chinese population in Hong Kong

There is a paucity of literature examining the longitudinal course of insomnia using standardized diagnostic criteria. This study aims to evaluate the persistence, remission, relapse, and incidence rates of insomnia symptoms and insomnia disorders according to the Diagnostic and Statistical Manual of Mental Disorders, 4th and 5th edition (DSM-IV and DSM-5). A total of 398 community dwellers were interviewed annually over two years using the Brief Insomnia Questionnaire, a validated questionnaire for deriving insomnia diagnoses. Normal sleepers were defined according to the DSM-5 quantitative criteria as having insomnia symptoms at most twice per week. Estimates were weighted against population age and sex distribution. Persistence for two consecutive years was 26.3, 26.4, and 23.0% for insomnia symptoms, DSM-IV, and DSM-5 insomnia disorders; remission rate was 55.8, 22.9, and 26.1%, relapse rate was 21.8, 1.3, and 0%, while incidence rate was 62.4, 19.6, and 4.5%. The common trajectories for DSM-IV insomnia disorder were to remain the same (26.4%), followed by a change to insomnia symptoms at the second year (25.7%), and at the third year (17.3%). For DSM-5 insomnia disorder, a change to insomnia symptoms at the second year was the commonest (28.3%), followed by continuing the same (23.0%), and a change to insomnia symptoms at the third year (14.0%). Over a two-year naturalistic follow-up, persistence of insomnia disorder was roughly 25%. Changes from insomnia disorder to insomnia symptoms were common; however, remission only occurred in about 25%, highlighting the chronic course of insomnia, perhaps due to a lack of treatment, under-treatment, or resistance to treatment. Incidence of insomnia symptoms was 62.4%, suggesting a high risk of developing insomnia in the general population.

Emergence of Sex Differences in Insomnia Symptoms in Adolescents: A Large-Scale School-Based Study

STUDY OBJECTIVES

This study aimed to explore the moderation of pubertal status on the onset of sex differences in the prevalence of insomnia symptoms and their health correlates.

METHODS

A total of 7,507 children and adolescents (weighted percentage of female: 48.5%) aged between 6-17 y were recruited from thirty-one primary and secondary schools. Participants with difficulty initiating sleep (DIS), difficulty maintaining sleep (DMS), and/or early morning awakening (EMA) ≥ 3 times/week in the past month were considered as having insomnia symptoms. The severity of insomnia was measured by the Insomnia Severity Index (ISI).

RESULTS

The prevalence of insomnia symptoms increased from 3.4% to 12.2% in girls (3.6-fold) and from 4.3% to 9.1% in boys (2.1-fold) from Tanner stage 1 to 5. There was a significant interaction between sex and Tanner stage in the prevalence of insomnia (P < 0.001) with an emergence of female preponderance at Tanner stage 4 even after controlling for age, family income, and school start time. Similar sex-Tanner stage interactions were found in DIS, DMS, and ISI total score but not EMA. Insomnia symptoms were strongly associated with behavioral problems, poor mental health, and poor general health in both sexes. Boys with insomnia would report more maladaptive lifestyles (smoking, alcohol, and energy drinks) whereas girls with insomnia were more susceptible to emotional and relationship difficulties.

CONCLUSIONS

Pubertal maturation was associated with a progressive increase in the prevalence of insomnia symptoms with the emergence of female preponderance in both the prevalence and severity of insomnia symptoms at late puberty.

CLINICAL TRIALS REGISTRATION

Chinese Clinical Trial Register, http://www.chictr.org.cn, ID: ChiCTR-TRC-12002798.