Sleep

The review associated sleep-disordered breathing with poorer quality of life and physical capacity in chronic heart failure. Treatment findings varied: continuous positive airway pressure improved several sleep and function measures, while adaptive servo-ventilation was linked to higher mortality among patients with reduced left ventricular function. The findings cannot be generalized across all breathing disorders or heart failure patients.

Keep in mind: The abstract does not provide effect sizes, comparator details, follow-up periods or study-level quality ratings. It includes both obstructive and central sleep apnea, which limits conclusions about either condition alone.

Across prospective cohort studies, obstructive sleep apnea was associated with a higher risk of subsequent cardiovascular events, with stronger associations at greater severity. The mild category's result was inconclusive. An additional analysis linked CPAP adherence with lower risk, but these observational findings cannot show that apnea caused events or that adherence prevented them.

Keep in mind: The abstract does not specify the cardiovascular endpoints, reference groups, or factors accounted for in pooled estimates. Cohort data cannot rule out other explanations for the associations or establish a causal treatment benefit.

Pulmonary hypertension appeared relatively common among the sleep apnea populations studied. Patients who also had pulmonary hypertension showed higher body mass index and worse markers of disrupted breathing and oxygen levels. Yet the analysis did not find a consistent severity-related pattern in prevalence. These associations do not establish that sleep apnea caused pulmonary hypertension.

Keep in mind: This abstract-based summary reports highly variable prevalence estimates across studies. Diagnostic thresholds and methods also differed, so the pooled figure should not be treated as every sleep apnea patient’s personal probability.

The review reported less severe insomnia and better sleep quality after cognitive behavioral therapy for insomnia across the included studies. Remote delivery also appeared workable for patients and caregivers. These findings support further research in the clinical groups studied, but small samples and short follow-up leave the durability and wider impact of sleep improvements uncertain.

Keep in mind: Studies were small, used different treatment schedules and comparators, and followed participants briefly. Reporting did not consistently show whether improvements were clinically meaningful.

Cognitive behavioral therapy for insomnia was associated with higher remission odds across every delivery format examined. Individual and supported online formats also showed higher remission odds than fully automated online therapy in an adjusted analysis. However, that comparison came from meta-regression, while lower completion remained a challenge for the online formats.

Keep in mind: This abstract-based summary cannot assess an individual's likely benefit: follow-up periods, control details and confidence intervals are not reported. The adjusted comparisons across formats do not establish that delivery method alone explains the differences.

Adults with less regular sleep timing tended to have more depression and anxiety symptoms and less favorable cardiometabolic outcomes. The review also described associations with cognitive outcomes and mortality. These findings make sleep timing a useful research question, but they do not show that making a schedule more regular will prevent illness.

Keep in mind: This abstract-based summary describes associations, which cannot establish causation. Different sleep-regularity measures and outcomes prevented meta-analysis, and the abstract does not provide study-specific follow-up periods or enough detail to assess every comparison.

The review identified behaviour change techniques used in sleep programs that also assessed cognition in middle-aged adults. Several technique categories were linked to positive sleep and cognitive outcomes, but this does not establish which individual techniques produced those changes. The abstract offers a map of program content, without enough comparative detail to identify the most effective approach.

Keep in mind: The abstract provides no effect sizes, comparator descriptions, intervention durations or results of its quality assessments. It also does not establish that any single technique independently improves sleep or cognition.

Compared with placebo, melatonin modestly increased sleep duration and cognitive test scores in older adults with cognitive impairment. Everyday functioning and depression did not show statistically significant benefits. The abstract does not establish a dependable overall clinical benefit, lasting cognitive improvement or prevention of cognitive decline.

Keep in mind: Results varied across studies, and the abstract gives no treatment durations or doses. The authors describe the findings as falling short of definitive evidence of efficacy.

The pooled findings varied by fasting context. Ramadan studies reported shorter self-reported sleep and poorer self-rated sleep quality. Non-Ramadan time-restricted feeding studies reported longer sleep overall, but their sleep-quality scores did not differ significantly from control groups. The abstract offers no numerical effect sizes, so it cannot show whether the changes were large enough to matter in daily life.

Keep in mind: The abstract gives no effect sizes, follow-up periods, or participant characteristics. Although objective sleep measurements were included in the review, their results are not separately reported, limiting comparison with the self-reported findings.

Students assigned to HIIT had lower depression, anxiety, and sleep-quality questionnaire scores after the program. The control group showed no statistically significant sleep change. However, comparing significance within each group does not establish a difference between groups, and the abstract does not report a direct estimate of the intervention's advantage over health education.

Keep in mind: This abstract-based summary covers a small, brief trial in a specific student population. Questionnaire results and within-group changes cannot establish lasting benefit or changes in sleep architecture.

The study proposed a shared set of outcomes for trials testing sleep interventions in people with cognitive impairment. Its main contribution is agreement about what future research should measure, including sleep, daytime sleepiness, cognition and mood. It does not establish whether any particular treatment improves sleep or other health outcomes.

Keep in mind: The abstract does not give interview or panel sizes, the study timeline, or details of how each outcome should be measured. Agreement on outcomes alone cannot show that future trials will produce better evidence.

This guideline addresses dependence on Z-drugs used for insomnia and how clinicians manage discontinuation. Its recommendations combine a literature review with expert consensus. The abstract describes assessment, gradual tapering and psychological support, but supplies no patient outcome results showing how well the proposed approach works or how it compares with alternatives.

Keep in mind: The abstract provides no treatment effect estimates, evidence grades or comparisons of withdrawal strategies. It does not show whether the recommended approach improves withdrawal success or reduces adverse effects.

Observational studies linked current recreational cannabis use with poorer sleep quality, more insomnia symptoms and both shorter and longer sleep duration. Experimental studies found no association with sleep quality or duration. These results do not establish that cannabis caused sleep problems, and the experimental findings do not prove that cannabis has no effect on sleep.

Keep in mind: The authors note possible bias in the observational findings. The abstract provides no effect sizes, detailed exposure amounts or follow-up durations, limiting judgments about the size and timing of any relationship.

Older surgical ICU patients assigned to a sleep-support protocol had fewer delirium cases than those receiving usual care. The estimate remained uncertain, with a credible interval compatible with benefit or harm. Sleep-quality scores and other clinical outcomes did not differ significantly, making this an early signal that needs confirmation.

Keep in mind: The authors call these findings hypothesis-generating and seek larger multicenter trials. Sleep was assessed subjectively, and use of earplugs and eye masks was only moderate.

Children with prenatal alcohol exposure generally had poorer sleep than typically developing peers, including more awakenings and shorter sleep duration. Higher exposure levels were associated with earlier and more persistent disturbances. These patterns describe associations across studies; they do not establish the cause of an individual child's sleep problem or demonstrate that a particular intervention works.

Keep in mind: The pooled studies differed substantially, and the meta-analysis used subjective sleep outcomes. The abstract does not give study follow-up lengths or confidence intervals for the highlighted effect sizes.

This abstract-based review found lower self-reported depression, anxiety and stress scores after exercise interventions in people with insomnia symptoms. Initial pooled analyses did not find significant improvements in fatigue or mental health-related quality of life. The abstract does not report whether insomnia symptoms themselves improved or how many participants recovered from depression.

Keep in mind: The abstract does not describe control conditions, intervention durations or evidence certainty. Its subgroup findings do not establish an optimal exercise schedule.

This abstract-based review suggests that cognitive behavioural therapy for insomnia may modestly improve reported insomnia symptoms and sleep quality in people with cancer. Most evidence was uncertain, and objective sleep measurements showed less clear benefits. The results do not establish longer-term improvement or reliable differences in serious adverse events.

Keep in mind: Risk of bias was often high, and evidence certainty was mostly low or very low. Participants were predominantly women, with breast cancer the most studied cancer, limiting confidence in broader application.

This review proposes that altered signaling in the locus coeruleus may help connect psychiatric symptoms with disrupted sleep and stress responses. It combines evidence from several research settings and discusses potential treatment targets. The abstract does not establish a single shared cause of these disorders or show that targeting this brain region improves patient outcomes.

Keep in mind: Although the title calls this systematic, the abstract describes a narrative review and does not report a search method, study count or pooled estimates.

The review found sleep-related breathing disorders in a wide range of athletic groups, with reported frequency varying greatly by sport. Daytime sleepiness and other health problems were reported alongside these disorders. Treatment findings came from selected sports and do not establish the same outcomes for every athlete; evidence for para-athletes remained particularly limited.

Keep in mind: The abstract does not describe study designs, treatment comparators or follow-up periods, limiting interpretation of reported treatment improvements. It also identifies a major evidence gap for para-athletes.

The review offers only limited evidence that clonazepam, melatonin or pramipexole reduce disturbing dream content. Levodopa was more consistently linked with vivid or distressing dreams, including nightmares, but that evidence remained preliminary. These findings concern what people report dreaming, and the abstract does not establish medication effects on the full range of REM sleep behavior disorder symptoms.

Keep in mind: This abstract-based account reflects studies with inconsistent definitions, nonstandardized methods and frequent reliance on remembered or anecdotal experiences. Those limitations restrict comparisons and make firm conclusions about individual medicines difficult.

Across the included reviews, adolescent device use was associated with shorter sleep, later bedtimes and poorer sleep quality. Late-night use and problematic social media or internet use stood out. The evidence describes relationships across varied studies; it does not establish that changing device use would produce a particular sleep improvement for an individual teenager.

Keep in mind: Studies differed considerably, and many relied on self-reported information. The abstract gives no pooled effect estimates or follow-up periods, leaving the size, timing and causal direction of the associations uncertain.

White noise showed benefits for selected sleep outcomes, with results differing across measures. Infants and toddlers slept longer across a full day, but nighttime sleep duration showed no statistically significant difference. Adult and older patient groups had improved sleep-quality questionnaire scores. These results do not establish a consistent benefit for every population or sleep outcome.

Keep in mind: This abstract-based account is limited by differences among studies and their methodological quality. Sparse evidence prevented additional sensitivity analyses for several age and care-setting subgroups.

The combined studies found differences across several aspects of sleep, including shorter duration and more nighttime disruption among children with ADHD. These comparisons do not establish that ADHD causes the sleep differences. Reported patterns involving age, sex and slow-wave sleep also do not demonstrate that a particular sleep intervention would improve outcomes.

Keep in mind: This abstract-based account lacks effect sizes, confidence intervals, a study-quality assessment and clear follow-up intervals. Its analysis suggests an explanatory role for slow-wave sleep without demonstrating that an intervention targeting it improves outcomes.

Across the included studies, night shift work was not significantly associated with ovarian cancer overall. Some subsets, including case-control studies, did show higher odds. This mixed observational evidence neither establishes that night work causes ovarian cancer nor rules out an association; the way exposure was measured remains an important uncertainty.

Keep in mind: The abstract gives neither follow-up durations nor detailed reference work schedules. Studies used different exposure assessments, and the authors suggest misclassification may have weakened some estimates.