Sleep

Across the included trials, brief behavioral therapy improved several sleep outcomes compared with usual care, but the review did not find significant differences in total sleep time or daytime sleepiness. In-person brief therapy and cognitive behavioral therapy had similar reported outcomes, although the abstract does not establish that the treatments are equivalent.

Keep in mind: This abstract-based summary cannot assess how lasting the benefits were. Treatment lengths, follow-up timing, and a formal certainty rating for the evidence were not reported.

The review estimated how common cognitive impairment was among adults with confirmed obstructive sleep apnea. The pooled percentage was substantial, but results differed by assessment method and location. This prevalence estimate does not show that sleep apnea caused cognitive impairment, predict an individual's future decline, or test whether treatment changes cognition.

Keep in mind: The abstract does not report a common assessment timeframe or comparison with adults without sleep apnea. Its wide confidence interval leaves considerable uncertainty around the overall prevalence.

The review reported improvements in sleep quality across sensory stimulation studies, including time to fall asleep, total sleep time and subjective sleep experience. However, it does not provide pooled effects or explain the control conditions. The abstract therefore cannot show how large the benefit was or which sensory approach was most effective.

Keep in mind: Interventions and sleep assessments varied substantially. Without effect estimates, control descriptions or detailed adverse-event monitoring, the abstract cannot establish comparable benefits across therapies or confirm their safety.

The review found an association between the transition to daylight saving time and poorer sleep duration and quality, alongside greater daytime sleepiness. Effects appeared more evident in spring and among evening chronotypes. However, the findings varied, and differences in methods and outside influences prevent a firm conclusion about the transition's impact.

Keep in mind: Methods differed across studies, and external influences complicated interpretation. This abstract-based explanation cannot establish causation or determine a reliable size of the association for any particular age group.

The review reported improvements in the time taken to fall asleep, wakefulness after sleep began, and total sleep time with dual orexin receptor antagonists. Effects on depressive symptoms were modest. This suggests a more consistent sleep-related signal, but the abstract cannot establish lasting benefits or how well these medicines address depression itself.

Keep in mind: Most studies were short, and participant groups varied substantially. The abstract supplies no comparative effect sizes or adverse-event rates, limiting judgments about the magnitude of benefit and longer-term safety.

Several insomnia medicines showed favourable results for time spent awake after initially falling asleep compared with placebo. However, some conclusions changed when the analysis accounted for follow-up duration or age. Safety signals came from a separate adverse-event reporting database, which cannot establish how often these events occur among all people using a medicine.

Keep in mind: This abstract-based explanation cannot assess the full trial methods or adverse-event reporting patterns. The abstract omits overall trial durations, and the authors call for more direct comparisons between medicines.

Research on melatonin and insomnia generally increased across the publication window, despite annual fluctuations. The authors describe work involving children, older adults and people with neurological disorders as prominent themes. This is a picture of what researchers have studied; it does not establish how much melatonin helps insomnia, who benefits, or how safely it works.

Keep in mind: The abstract reports publication patterns rather than treatment effects. It provides no pooled sleep outcomes or safety estimates, so publication volume cannot be used to judge clinical benefit.

Insomnia and sleep disorders were associated with heart failure after statistical adjustment in the survey analysis. A separate analysis using genetic variants linked to sleeplessness also supported a possible causal relationship. These findings strengthen the case for investigating sleep and heart failure together, but they do not show that treating sleep disturbances prevents the condition.

Keep in mind: The authors acknowledge possible residual confounding in the observational analysis. The abstract also omits detailed genetic-analysis checks and follow-up information; its causal interpretation remains more tentative than evidence from a treatment trial.

Adults receiving dialysis who had sleep-disordered breathing had higher hazards of death and major cardiovascular events in pooled observational studies. These associations do not establish that breathing disruption caused either outcome. The abstract also does not show whether screening for or treating sleep-disordered breathing improves survival or cardiovascular health.

Keep in mind: All included studies were observational. The abstract reports neither follow-up durations nor absolute event risks, and associations differed by region and how sleep-disordered breathing was identified.

Cognitive behavioral therapy for insomnia may reduce insomnia severity in adults who also have schizophrenia. Compared with usual treatment, the pooled result favored the sleep-focused therapy after treatment, but evidence certainty was low. The effect on overall schizophrenia symptoms remained unclear, so better insomnia scores should not be taken as evidence of broader psychiatric improvement.

Keep in mind: This abstract-based summary reflects low-certainty evidence. Most secondary outcomes appeared in at most a single trial and had very wide confidence intervals; treatment duration was unspecified.

The review found an overall improvement in sleep-quality scores in older adults with sleep disorders who received inhaled lavender. However, results varied substantially across studies. This abstract-based summary describes preliminary evidence on sleep assessment; it does not establish a dependable benefit for every older adult or show that long-term use is safe.

Keep in mind: Results varied substantially between studies, and the abstract does not identify comparison conditions or treatment lengths. The authors describe the evidence as preliminary and say effectiveness and safety, particularly with longer use, need further study.

Sleep apnea, disrupted sleep, sleep quality and total sleep time were associated with cognition in people with cerebrovascular conditions. The reported links involved overall thinking ability and specific skills, including memory and verbal fluency. This review identifies relationships worth studying; it does not establish that sleep disturbances caused the cognitive problems.

Keep in mind: The abstract gives no pooled effect sizes, follow-up periods or study-level quality ratings. It therefore cannot show how strong, consistent or temporally ordered the associations were.

The pooled imaging studies found differences in both brain gray matter volume and spontaneous activity in people with insomnia compared with healthy controls. However, the structural and activity differences appeared in different regions. This describes a pattern associated with insomnia; it does not show whether insomnia caused the differences or resulted from them.

Keep in mind: The abstract gives no participant count, pooled effect sizes or uncertainty estimates. Its interpretation about cognition and emotion concerns the implicated brain regions; results from tests of those outcomes are not reported.

The review found little support for reduced cognitive flexibility as the process connecting insomnia with later depression. Most associations were null, including consistently null longitudinal findings for insomnia and cognitive flexibility. Because no study directly tested the complete pathway, these findings leave the proposed mechanism unproven rather than showing that it is impossible.

Keep in mind: The abstract supplies no pooled effect sizes, participant totals or follow-up lengths. Indirect associations cannot establish the proposed causal pathway, and null findings do not demonstrate that meaningful effects are impossible.

The review found improvements in sustained attention and reaction time after sleep extension, but no reported benefit for executive function. Benefits against sleep debt were short-lived. For military-aged adults, the evidence summarized here does not support relying on sleep extension alone to address cognitive difficulties following sleep debt, and it does not specify an effective extension schedule.

Keep in mind: Most included studies were rated moderate quality. The abstract does not report extension amounts, exact comparison conditions, effect sizes or the duration of benefits, limiting practical interpretation.

Cognitive behavioral therapy for insomnia (CBT-I) improved sleep outcomes in adults living with chronic disease. Participants also reported high satisfaction, and treatment-related adverse effects were described as rare. The results concern insomnia and sleep measures; they do not establish that this therapy improves the underlying illness or that every patient will benefit equally.

Keep in mind: This abstract-based summary cannot show how long benefits lasted: treatment and follow-up durations are not supplied. It also lacks details on control conditions and the types or severity of adverse effects.

Cognitive behavioral therapy and exercise showed promising sleep results in older adults. For cognitive behavioral therapy, reported changes included falling asleep sooner, less wakefulness after sleep began and higher sleep efficiency. Evidence certainty was low to very low, leaving uncertainty about how dependable these benefits are and how the approaches compare.

Keep in mind: Most included reviews had low methodological quality, and their results were too varied for a pooled synthesis. Comparator details and treatment durations are absent from the abstract.

Most studies in this review linked shift work with a greater likelihood of metabolic dysfunction-associated steatotic liver disease, or MASLD. Associations tended to be stronger with longer or more frequent exposure to shift schedules. Because the evidence was observational and measurements had limitations, the review cannot establish that shift work itself causes the disease.

Keep in mind: The review identified imprecise measurements of shift work and liver outcomes, plus limited analysis of changes over time. These issues weaken causal interpretation; the abstract also supplies no pooled estimate of the association.

Sleep quality was associated with balance and cognition, and confidence in balance was linked with cognition. The relationships were generally weak, and some may have limited practical importance. This evidence map does not establish that improving sleep would improve balance or thinking, or that a single intervention would meaningfully improve all these functions.

Keep in mind: Most included studies were observational. The abstract gives limited detail about measurement tools, follow-up periods and the clinical meaning of individual associations, making it hard to translate the findings into everyday functional outcomes.

Sleep loss was linked to poorer performance across executive-function tasks, but the pattern depended on what researchers measured. Responses slowed significantly in most task categories; cognitive flexibility was the exception for reaction time. Accuracy results varied across tasks, showing why speed alone gives an incomplete picture of performance after sleep loss.

Keep in mind: The abstract does not describe participant characteristics, comparison conditions or sleep-loss duration, and it provides no exact pooled estimates or confidence intervals. Everyday effects cannot be quantified from this summary.

The pooled trials reported better sleep questionnaire scores among people with dementia receiving acupuncture. However, certainty in that result was low, and the abstract does not specify the comparison treatments or how long participants were assessed. The findings leave uncertainty about the size, durability and practical meaning of any benefit.

Keep in mind: Differences among studies and methodological weaknesses reduced confidence in the results. Abstract-only access also prevents checking how interventions, comparison groups and outcome assessments differed across trials.

The reviewed studies linked shift work, disturbed sleep, and metabolic syndrome, with shorter sleep showing a stronger association than poorer sleep quality. Longer exposure to night shifts was also linked to greater risk. These patterns do not establish a causal chain from shift schedules through sleep to metabolic illness, or show that changing sleep would prevent it.

Keep in mind: The abstract does not provide pooled effect estimates, confidence intervals, follow-up durations, or detailed comparison groups. It calls for longitudinal studies to clarify causal pathways, leaving both the magnitude of associations and their causal interpretation uncertain.

The analysis reported better sleep quality with mindfulness, exercise, yoga, massage, acupuncture, aromatherapy, relaxation and cognitive behavioral therapy compared with control conditions. Mindfulness received the highest statistical ranking. The abstract does not establish how noticeable these improvements were, how long they lasted, or whether the ranking reflects a dependable advantage over other approaches.

Keep in mind: This abstract-based explanation lacks the sleep-quality scale, control details, intervention durations and quality-assessment results. These omissions limit interpretation of the reported benefits and confidence in comparisons between approaches.

Sleep deprivation was associated with changes in some heart rate variability measures, while others did not change significantly. The authors interpreted this pattern as possible disruption of autonomic regulation. These physiological measurements do not establish that participants developed cardiovascular disease, and the abstract does not quantify the size of the pooled changes.

Keep in mind: This abstract-based account lacks control conditions, deprivation durations and pooled effect estimates. Differences in measurement methods, sleep-loss duration and control of confounding factors complicate interpretation across studies.