scholarly journals Adults Who Are Overweight or Obese and Consuming an Energy-Restricted Healthy US-Style Eating Pattern at Either the Recommended or a Higher Protein Quantity Perceive a Shift from “Poor” to “Good” Sleep: A Randomized Controlled Trial

2020 ◽  
Vol 150 (12) ◽  
pp. 3216-3223
Author(s):  
Joshua L Hudson ◽  
Jing Zhou ◽  
Wayne W Campbell
Keyword(s):  
Sleep Quality ◽  
Repeated Measures ◽  
Controlled Trial ◽  
Sleep Onset ◽  
Energy Restriction ◽  
Sleep Onset Latency ◽  
Quality Indices ◽  
Eating Pattern ◽  
Good Sleep ◽  
Over Time

ABSTRACT Background Limited evidence suggests that consuming a higher-protein diet during weight loss improves subjective indices of sleep in overweight and obese adults. Objective We sought to a priori assess the effects of consuming the recommended versus a higher protein Healthy US-Style Eating Pattern during energy-restriction on sleep quality indices. Design Using a randomized, parallel study design, 51 adults (mean ± SEM age: 47 ± 1 y; BMI: 32.6 ± 0.5 kg/m2) consumed a controlled USDA Healthy US-Style Eating Pattern containing 750 kcal/d less than their estimated energy requirement for 12 wk. Participants were randomly assigned to consume either 5 or 12.5 oz-equivalent (eq)/d of protein foods. The additional 7.5 oz-eq/d came from animal-based protein sources and displaced primarily grains. Objective (wrist-worn actigraphy) and subjective (Pittsburgh Sleep Quality Index, Epworth Sleepiness Scale) sleep quality indices were measured at baseline, week 6, and week 12. Results Among all participants, body mass decreased (−6.2 ± 0.4 kg). Dietary protein intake did not affect any objective or subjective sleep quality outcomes measured (repeated measures ANOVA). Over time, objective measures of time spent in bed, time spent sleeping, sleep onset latency, and time awake after sleep onset did not change; however, sleep efficiency improved (1 ± 1%; P = 0.027). Subjectively, global sleep scores [GSS: −2.7 ± 0.4 arbitrary units (au)] and daytime sleepiness scores (−3.8 ± 0.4 au; both P < 0.001) improved over time. The GSS improvement transitioned the participants from being categorized with “poor” to “good” sleep (GSS: >5 compared with ≤5 au of a 0–21 au scale; baseline 7.6 ± 0.4 au, week 12: 4.8 ± 0.4 au). Conclusions Although objective sleep quality may not improve, adults who are overweight or obese and poor sleepers may become good sleepers while consuming either the recommended or a higher-protein energy-restricted Healthy US-Style Eating Pattern. This trial was registered at clinicaltrials.gov as NCT03174769.

scholarly journals Adults Consuming an Energy-Restricted US Healthy-Style Eating Pattern at Either the Recommended or a Higher Protein Quantity Perceive a Shift from “Poor” to “Good” Sleep

2020 ◽  
Vol 4 (Supplement_2) ◽  
pp. 528-528
Author(s):  
Joshua Hudson ◽  
Jing Zhou ◽  
Wayne Campbell
Keyword(s):  
Sleep Quality ◽  
Dietary Protein ◽  
Sleep Onset ◽  
Sleep Onset Latency ◽  
Quality Indices ◽  
Subjective Sleep Quality ◽  
Eating Pattern ◽  
Subjective Sleep ◽  
Good Sleep ◽  
Over Time

Abstract Objectives Limited evidence from secondary analyses suggests consuming a higher protein diet during weight loss improves subjective indices of sleep in adults who are overweight and obese. We sought to a priori assess the effects consuming a U.S. Healthy–Style Eating Pattern with the recommended versus a higher amount of protein and moderate energy-restriction on sleep quality indices. Methods Using of a randomized, parallel-design, 51 men and women (mean ± SEM; age: 47 ± 1 y; BMI: 32.6 ± 0.5 kg/m2) consumed a controlled U.S. Healthy-Style Eating Pattern containing 750 kcal/d less than their estimated energy requirement for 12 wk. The additional dietary protein (7.5 oz-eq/d) came from animal-based protein sources and displaced primarily whole and reined grains. Objective and subjective sleep quality indices were measured using wrist-worn actigraphy and questionnaires (Pittsburgh Sleep Quality Index and Epworth Sleepiness Scale), respectively, at pre-, mid- (week 6), and post-intervention (week 12). Results Among all participants, body mass decreased (-6.2 ± 0.4 kg). Dietary protein intake did not affect any of the objective or subjective sleep quality outcomes measured. Over time, objective measures of time spend in bed, time spent sleeping, sleep efficiency, sleep onset latency, and time awake after sleep onset did not change. Subjective measures of global sleep score (GSS, −3.8 ±0.4 au) and daytime sleepiness score (−3.8 ± 0.4 au; both P < 0.001) improved over time. The GSS improvement transitioned the group of participants from being categorized with a poor to a good sleep condition (GSS >5 versus ≤5 au of 0–21 au scale; Pre 7.9 ± 0.5 au, Post: 4.0 ± 0.6 au). Conclusions Although objective sleep quality may not improve, adults with poor sleep may perceive becoming good sleepers while consuming a moderately energy-restricted U.S. Healthy-Style Eating Pattern containing either the recommended or a higher amount of protein. Funding Sources The Beef Checkoff and American Egg Board-Egg Nutrition Center.

scholarly journals 0524 Web-Delivered CBT for Insomnia Intervention Improves Sleep Among Adults with Insomnia and Depressive Symptoms

SLEEP ◽  
2020 ◽  
Vol 43 (Supplement_1) ◽  
pp. A200-A201
Author(s):  
P J Batterham ◽  
H Christensen ◽  
F P Thorndike ◽  
L M Ritterband ◽  
R Gerwien ◽  
...  
Keyword(s):  
Depressive Symptoms ◽  
Sleep Quality ◽  
Large Scale ◽  
Behavioral Therapy ◽  
Controlled Trial ◽  
Sleep Onset ◽  
Sleep Diary ◽  
Sleep Onset Latency ◽  
Sleep Diaries

Abstract Introduction Cognitive behavioral therapy for insomnia (CBT-I) is the first line recommended treatment for adults with chronic insomnia. In a prior randomized controlled trial (RCT), data showed web-delivered CBT-I (SHUTi) reduced insomnia severity as well as symptoms of depression, among adults with insomnia and elevated depressive symptoms. The present study aimed to further evaluate the effectiveness of web CBT-I to improve sleep outcomes as measured by prospectively entered sleep diaries in this same sample. Methods A large-scale RCT (N=1149) of Australian adults with insomnia and depressive symptoms compared a 9-week, web CBT-I therapeutic with an attention-matched web program at baseline, posttest and 6-, 12-, and 18-month follow-ups. Although depression outcomes have been presented previously, the online sleep-diary derived variables have not yet been presented, including sleep-onset latency (SOL), wake after sleep onset (WASO), sleep efficiency (SE), number of awakenings, sleep quality, and total sleep time (TST). Sleep diaries were entered online for 10 days at each assessment period. Results Data showed web CBT-I participants demonstrated greater reductions from baseline to posttest compared with control for the following sleep variables: SOL (LS mean difference [95% CI]=-22.3 min [-29.2, -15.3]; p<.0001), WASO (-17.8 min [-23.4, -12.3]; p<.0001), and number of awakenings (-0.38 [-0.68, -0.09]; p=.0113). Web CBT-I also showed greater improvements in SE (9.18% [7.25%, 11.10%]; p<.0001) and sleep quality (0.41 [0.30, 0.53]; p<.0001) from baseline to posttest compared with control. TST was not significantly different between groups at posttest or 6-month follow-up, although it improved over baseline at 12 (18.73 min [7.39, 30.07]; p=.0013) and 18 months (23.76 min [9.15, 38.36]; p=.0015) relative to control. All other significant sleep treatment effects were maintained in the treatment arm at 6, 12, and 18-month follow-up. Conclusion Data showed web CBT-I produced lasting improvements in sleep outcomes among adults with insomnia and elevated depressive symptoms. Support Clinical trial ACTRN12611000121965 was funded by the Australian National Health and Medical Research Council. The statistical analysis described here was funded by Pear Therapeutics, Inc and conducted by Provonix.

scholarly journals 0519 Mindfulness Based Therapy for Insomnia Improves Objective Markers of Sleep in the Elderly: Preliminary Data from the Mindfulness Sleep Therapy (MIST) Study

SLEEP ◽  
2020 ◽  
Vol 43 (Supplement_1) ◽  
pp. A198-A199
Author(s):  
K F Wong ◽  
F Perini ◽  
S L Henderson ◽  
J Teng ◽  
Z Hassirim ◽  
...  
Keyword(s):  
Preliminary Data ◽  
Repeated Measures ◽  
Mixed Model ◽  
Controlled Trial ◽  
Sleep Onset ◽  
Sleep Diary ◽  
Control Group ◽  
Poor Sleep ◽  
Sleep Onset Latency ◽  
Time In Bed

Abstract Introduction Mindfulness-based treatment for insomnia (MBTI) is a viable intervention for improving poor sleep. We report preliminary data from an ongoing pre-registered, randomized controlled trial which investigates the effect of MBTI on elderly adults. Methods Participants above 50 years old with PSQI ≥ 5 were recruited and randomised into either MBTI or an active control group (Sleep hygiene education and exercise program, SHEEP) in sequential cohorts with about 20 participants per cohort (10 per group). Before and after the intervention, 1 night of portable polysomnography (PSG) and 1 week of actigraphy (ACT) and sleep diary (DIARY) data were collected. We report the ACT and DIARY results of the first 3 cohorts (n = 46, male = 23, mean age = 62.3, std = 6.3) and PSG data of the first 2 cohorts (n = 29, male = 12, mean age = 62.5, std = 5.7). Time in bed (TIB), total sleep time (TST), sleep onset latency (SOL), wake after sleep onset (WASO), and sleep efficiency (SE) were analysed with mixed-model repeated-measures ANOVA. Results We observed increases in TIBDIARY (F1,44 = 5.151, p < .05) and SEDIARY (F1,44 = 22.633, p < .0001), and significant reductions in SOLDIARY (F1,44 = 7.031, p < .05) and WASODIARY (F1,39 = 7.411, p < .05). In the actigraphy data, we found a significant interaction in SOLACT (F1,39 = 4.273, p < .05) with an increase in SHEEP SOLACT (t18= 2.36, p < .05). Significant reductions were also observed in WASOACT (F1,44 = 16.459, p < .0001) Finally, we observed a reduction in SOLPSG (F1,26 = 5.037, p <. 05). All other tests were non-significant. Conclusion Preliminary results suggest that both interventions lead to improvements in sleep with more pronounced effects in subjective sleep reports. Objective sleep data suggest that improvements in sleep is a result of improved sleep quality and not simply extending sleep opportunity. These preliminary data shows that MBTI may be a promising intervention for elderly individuals with sleep difficulties. Support This study was supported by an award from the 7th grant call of the Singapore Millennium Foundation Research Grant Programme

scholarly journals Acupuncture Improves Certain Aspects of Sleep in Hematopoietic Stem Cell Transplantation Patients: a Randomized Controlled Trial

2021 ◽  
Author(s):  
Sarah El Iskandarani ◽  
Lingyun Sun ◽  
Susan Qing Li ◽  
Gloria Pereira ◽  
Sergio Giralt ◽  
...  
Keyword(s):  
Multiple Myeloma ◽  
Stem Cell ◽  
Hematopoietic Stem Cell Transplantation ◽  
Sleep Quality ◽  
Controlled Trial ◽  
Sleep Onset ◽  
Sleep Efficiency ◽  
Sleep Onset Latency ◽  
Onset Latency ◽  
Hematopoietic Stem

Abstract Background High-dose chemotherapy followed by hematopoietic stem cell transplantation (HSCT) is associated with a high symptom burden including decrease in sleep quality. We conducted a randomized sham-controlled trial (#NCT01811862) to study the effect of acupuncture on sleep quality during HSCT. Methods Adult multiple myeloma patients undergoing inpatient and outpatient autologous HSCT were randomized to receive either true or sham acupuncture once daily for 5 days starting the day after chemotherapy. Sleep onset, total sleep time, sleep efficiency percentage, and sleep-onset latency time were assessed using an Actigraphy Sleep Monitor. A multi-variate regression analysis was conducted to compare the average area-under-the-curve of five acupuncture intervention days for each sleep outcome between groups, adjusted by baseline score and inpatient or outpatient chemotherapy stratum. Results Over 32 months, 63 patients were enrolled. Participants undergoing true acupuncture experienced a significant improvement in sleep efficiency when compared to sham (-6.70, 95% CI -13.15, -0.25, p=0.042). Subgroup analysis showed that the improvement is more prominent in the inpatient setting (-9.62, 95% CI -18.76, -0.47, p=0.040). True acupuncture produced noticeable yet non-significant improvement in sleep-onset latency times. Between-group differences in other sleep related variables were not statistically significant. Conclusion Our data suggest that true acupuncture may improve certain aspects of sleep, including sleep efficiency and possibly sleep-onset latency, in multiple myeloma patients undergoing HSCT. By studying patient reported outcomes in future larger scale studies, acupuncture’s role in improving sleep quality during HSCT treatment can be further elucidated.

scholarly journals The effect of sleep-wake intraindividial variability in digital cognitive behaviour therapy for insomnia: A mediation analysis of a large-scale RCT

SLEEP ◽  
2021 ◽  
Author(s):  
Cecilie L Vestergaard ◽  
Øystein Vedaa ◽  
Melanie R Simpson ◽  
Patrick Faaland ◽  
Daniel Vethe ◽  
...  
Keyword(s):  
Psychological Distress ◽  
Large Scale ◽  
Controlled Trial ◽  
Sleep Onset ◽  
Depression Scale ◽  
Mediating Effect ◽  
Sleep Onset Latency ◽  
Composite Measures ◽  
Cognitive Behaviour ◽  
Insomnia Severity

Abstract Study Objectives Digital Cognitive Behavioural Therapy for Insomnia (dCBT-I) is an effective treatment for insomnia. However, less is known about mediators of its benefits. The aim of the present study was to test if intraindividual variability in sleep (IIV) was reduced with dCBT-I, and whether any identified reduction was a mediator of dCBT-I on insomnia severity and psychological distress. Methods In a two-arm randomized controlled trial (RCT), 1720 adults with insomnia (dCBT-I = 867; patient education about sleep = 853) completed the Insomnia Severity Index (ISI), the Hospital Anxiety and Depression Scale (HADS) and sleep diaries, at baseline and 9-week follow-up. Changes in IIV were analysed using linear mixed modelling followed by mediation analyses of ISI, HADS, and IIV in singular sleep metrics and composite measures (Behavioural Indices (BI-Z) and Sleep-disturbance Indices (SI-Z)). Results dCBT-I was associated with reduced IIV across all singular sleep metrics, with the largest between-group effect sizes observed for sleep onset latency (SOL). Reduced IIV for SOL and wake after sleep onset had the overall greatest singular mediating effect. For composite measures, SI-Z mediated change in ISI (b = -0.74; 95% Confidence Interval (CI) -1.04 to -0.52; 13.3%) and HADS (b = -0.40; 95% CI -0.73 to -0.18; 29.2%), whilst BI-Z mediated minor changes. Conclusion Reductions in IIV in key sleep metrics mediate significant changes in insomnia severity and especially psychological distress when using dCBT-I. These findings offer important evidence regarding the therapeutic action of dCBT-I and may guide the future development of this intervention.

The effect of 4-h versus 6-h time restricted feeding on sleep quality, duration, insomnia severity and obstructive sleep apnea in adults with obesity

2021 ◽  
pp. 026010602110023
Author(s):  
Sofia Cienfuegos ◽  
Kelsey Gabel ◽  
Faiza Kalam ◽  
Mark Ezpeleta ◽  
Vicky Pavlou ◽  
...  
Keyword(s):  
Obstructive Sleep Apnea ◽  
Sleep Apnea ◽  
Sleep Quality ◽  
Sleep Onset ◽  
Control Group ◽  
Sleep Onset Latency ◽  
Restricted Feeding ◽  
Wake Time ◽  
Obstructive Sleep ◽  
Insomnia Severity

Background: Time restricted feeding (TRF) involves deliberately restricting the times during which energy is ingested. Preliminary findings suggest that 8–10-h TRF improves sleep. However, the effects of shorter TRF windows (4–6 h) on sleep, remain unknown. Aims: This study compared the effects of 4-h versus 6-h TRF on sleep quality, duration, insomnia severity and the risk of obstructive sleep apnea. Methods: Adults with obesity ( n = 49) were randomized into one of three groups: 4-h TRF (eating only between 3 and 7 p.m.), 6-h TRF (eating only between 1 and 7 p.m.), or a control group (no meal timing restrictions) for 8 weeks. Results: After 8 weeks, body weight decreased ( p < 0.001) similarly by 4-h TRF (–3.9 ± 0.4 kg) and 6-h TRF (–3.4 ± 0.4 kg), versus controls. Sleep quality, measured by the Pittsburgh Sleep Quality Index (PSQI), did not change by 4-h TRF (baseline: 5.9 ± 0.7; week 8: 4.8 ± 0.6) or 6-h TRF (baseline: 6.4 ± 0.8; week 8: 5.3 ± 0.9), versus controls. Wake time, bedtime, sleep duration and sleep onset latency also remained unchanged. Insomnia severity did not change by 4-h TRF (baseline: 4.4 ± 1.0; week 8: 4.7 ± 0.9) or 6-h TRF (baseline: 8.3 ± 1.2; week 8: 5.5 ± 1.1), versus controls. Percent of participants reporting obstructive sleep apnea symptoms did not change by 4-h TRF (baseline: 44%; week 8: 25%) or 6-h TRF (baseline: 47%; week 8: 20%), versus controls. Conclusion: These findings suggest that 4- and 6-h TRF have no effect on sleep quality, duration, insomnia severity, or the risk of obstructive sleep apnea.

778 Poor Sleep Quality is Associated with Reduced Myelination in Patients with Psychotic Disorders

SLEEP ◽  
2021 ◽  
Vol 44 (Supplement_2) ◽  
pp. A303-A303
Author(s):  
Cagri Yuksel ◽  
Xi Chen ◽  
Lauren Watford ◽  
Margaret Gardner ◽  
Kathryn Lewandowski ◽  
...  
Keyword(s):  
White Matter ◽  
Sleep Quality ◽  
Psychotic Disorders ◽  
Sleep Onset ◽  
Sleep Loss ◽  
Magnetization Transfer Ratio ◽  
Poor Sleep ◽  
Sleep Onset Latency ◽  
Healthy Controls ◽  
Poor Sleep Quality

Abstract Introduction Recent studies show that sleep favors oligodendrocyte proliferation and myelination, and sleep loss is associated with alterations in white matter structure and decreased myelination. Psychotic disorders are characterized by disrupted white matter integrity, and abnormal axon and myelin structure. Despite common sleep disturbances in these disorders, little is known about the relationship between sleep quality and white matter findings. A novel in vivo neuroimaging technique that combines diffusion tensor spectroscopy (DTS) and magnetization transfer ratio (MTR) allows separately examining the axon structure and glial function, and myelin content, respectively. Using this method, we examined the association of sleep quality with white matter biology in a sample of patients with psychotic disorders and matched healthy controls. Methods Participants included patients diagnosed with bipolar disorder with psychotic features (euthymic or depressed, n=12) and schizophrenia spectrum disorders (n=9), and age and sex matched healthy controls (n=20). DTS and MTR data was collected from the right prefrontal white matter at 4T. DTS measures included apparent diffusion coefficients of water, NAA, creatine and choline. Sleep quality was measured using Pittsburgh Sleep Quality Index (PSQI). Results PSQI total score was significantly higher in patients. and patient sample included a higher percentage of poor sleepers (PSQI total score&gt;5). In patients, total PSQI score and sleep onset latency were significantly and negatively associated with MTR (F=6.9, p=0.02 and F=9.7, p=0.007, respectively). There was no difference in any DTS measures between groups. Conclusion Our preliminary results show that poor sleep quality is associated with decreased myelin content in the frontal lobe, in patients with psychotic disorders. This finding suggests that sleep loss may be a mediator of white matter alterations in psychosis. Support (if any) This work is supported by National Institute of Mental Health K23MH119322 to Cagri Yuksel

scholarly journals Moderate Exercise Plus Sleep Education Improves Self-Reported Sleep Quality, Daytime Mood, and Vitality in Adults with Chronic Sleep Complaints: A Waiting List-Controlled Trial

2011 ◽  
Vol 2011 ◽  
pp. 1-10 ◽  
Author(s):  
Carmen Gebhart ◽  
Daniel Erlacher ◽  
Michael Schredl
Keyword(s):  
Physical Exercise ◽  
Sleep Quality ◽  
Controlled Trial ◽  
Sleep Onset ◽  
Intervention Group ◽  
Waiting List ◽  
Control Group ◽  
Sleep Education ◽  
Sleep Complaints ◽  
Chronic Sleep

Research indicates that physical exercise can contribute to better sleep quality. This study investigates the six-week influence of a combined intervention on self-rated sleep quality, daytime mood, and quality of life. A nonclinical sample of 114 adults with chronic initiating and the maintaining of sleep complaints participated in the study. The intervention group of 70 adults underwent moderate physical exercise, conducted weekly, plus sleep education sessions. Improvements among participants assigned to the intervention group relative to the waiting-list control group (n=44) were noted for subjective sleep quality, daytime mood, depressive symptoms and vitality. Derived from PSQI subscores, the intervention group reported increased sleep duration, shortened sleep latency, fewer awakenings after sleep onset, and overall better sleep efficiency compared to controls. The attained scores were well sustained and enhanced over a time that lasted through to the follow-up 18 weeks later. These findings have implications in treatment programs concerning healthy lifestyle approaches for adults with chronic sleep complaints.

scholarly journals O020 What helped you and what prevented you from getting good sleep? Contribution of daily facilitators and barriers to adolescent sleep

2021 ◽  
Vol 2 (Supplement_1) ◽  
pp. A9-A10
Author(s):  
S Maskevich ◽  
L Shen ◽  
J Wiley ◽  
S Drummond ◽  
B Bei
Keyword(s):  
Everyday Life ◽  
Sleep Onset ◽  
Sleep Time ◽  
Sleep Onset Latency ◽  
Onset Latency ◽  
Previous Night ◽  
Quality Sleep ◽  
Sleep Environment ◽  
Facilitators And Barriers ◽  
Good Sleep

Abstract Introduction This intense longitudinal study examined factors that facilitate and hinder sufficient and good quality sleep in adolescents’ everyday life. Methods 205 (54.2% female, 64.4% non-white) Year 10–12 adolescents (Mage = 16.9 ± 0.9) completed daily morning surveys and wore actigraphy over 2 school-weeks and 2 subsequent vacation-weeks. Morning surveys assessed self-reported sleep and the usage of 8 facilitators and 6 barriers of sleep from the previous night. Linear mixed-effects models examined contribution of facilitators/barriers to actigraphy and self-reported total sleep time (TST) and sleep onset latency (SOL), controlled for age, sex, race, place of birth, and study day. Schooldays/non-schooldays was included as a moderator. Results Seven facilitators and two barriers were endorsed by high proportions (&gt;30%) of adolescents as frequently (≥50% days) helping/preventing them from achieving good sleep. Facilitators predicting longer TST and shorter SOL, were: “follow body cues”, “manage thoughts and emotions”, “create good sleep environment”, “avoid activities interfering with sleep” and “plan bedtime and go to bed as planned” (only TST on schooldays). Barriers predicting shorter TST and longer SOL, were: “pre-bedtime thoughts and emotions”, “unconducive sleep environment”, “activities interfering with sleep”, “inconsistent routines” and “other household members’ activities”. Overall, facilitators or barriers explained an additional 1–5% (p-values &lt; .001) of variance beyond the covariates. Discussion Adolescents perceive a range of factors as facilitating and as preventing sufficient and good quality sleep in everyday life. These factors are predictive of their sleep duration and onset latency, and need further research to understand their functions and clinical implications.

scholarly journals Guided Internet-delivered cognitive behavioural treatment for insomnia: a randomized trial

2013 ◽  
Vol 44 (7) ◽  
pp. 1521-1532 ◽  
Author(s):  
A. van Straten ◽  
J. Emmelkamp ◽  
J. de Wit ◽  
J. Lancee ◽  
G. Andersson ◽  
...  
Keyword(s):  
Controlled Trial ◽  
Sleep Onset ◽  
Intervention Group ◽  
Sleep Diary ◽  
The Internet ◽  
Control Group ◽  
Sleep Onset Latency ◽  
Cognitive Behavioural ◽  
Co Morbidity ◽  
Significant Difference

BackgroundInsomnia is a prevalent problem with a high burden of disease (e.g. reduced quality of life, reduced work capacity) and a high co-morbidity with other mental and somatic disorders. Cognitive behavioural therapy (CBT) is effective in the treatment of insomnia but is seldom offered. CBT delivered through the Internet might be a more accessible alternative. In this study we examined the effectiveness of a guided Internet-delivered CBT for adults with insomnia using a randomized controlled trial (RCT).MethodA total of 118 patients, recruited from the general population, were randomized to the 6-week guided Internet intervention (n = 59) or to a wait-list control group (n = 59). Patients filled out an online questionnaire and a 7-day sleep diary before (T0) and after (T1) the 6-week period. The intervention group received a follow-up questionnaire 3 months after baseline (T2).ResultsAlmost three-quarters (72.9%) of the patients completed the whole intervention. Intention-to-treat (ITT) analysis showed that the treatment had statistically significant medium to large effects (p < 0.05; Cohen's d between 0.40 and 1.06), and resulted more often in clinically relevant changes, on all sleep and secondary outcomes with the exception of sleep onset latency (SOL) and number of awakenings (NA). There was a non-significant difference in the reduction in sleep medication between the intervention (a decrease of 6.8%) and control (an increase of 1.8%) groups (p = 0.20). Data on longer-term effects were inconclusive.ConclusionsThis study adds to the growing body of literature that indicates that guided CBT for insomnia can be delivered through the Internet. Patients accept the format and their sleep improves.

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