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Measurement of sleep duration
Sleep efficiency (SE) is the ratio between the time a person spends asleep, and the total time dedicated to sleep (i.e. both sleeping and attempting to
Sleep_efficiency
Naturally recurring resting state of mind and body
sleep timing, the variability of sleep timing, and low sleep efficiency. However, sleep duration is the most-studied for its impact on obesity. Sleep
Sleep
Condition of not having enough sleep
Sleep deprivation, also known as sleep insufficiency or sleeplessness, is the health condition of not having adequate duration or quality of sleep to support
Sleep_deprivation
Technique for treating insomnia without (or alongside) medications
Total Sleep Time (TST), the actual amount of time the patient is usually able to sleep, compared with their TIB. Sleep efficiency = Total sleep time/Time
Cognitive behavioral therapy for insomnia
Cognitive_behavioral_therapy_for_insomnia
Disorder involving pauses in breathing during sleep
Sleep apnea (sleep apnoea or sleep apnœa in British English) is a sleep-related breathing disorder in which repetitive pauses in breathing, periods of
Sleep_apnea
Medical disorder of a person's sleep patterns
A sleep disorder, or somnipathy, is a medical disorder that disrupts an individual's sleep patterns and quality. This can cause serious health issues and
Sleep_disorder
Disorder causing trouble with sleeping
to decrease sleep latency (i.e., the time it takes to fall asleep), promoting sleep efficiency and increasing the total amount of sleeping time in people
Insomnia
Short period of sleep during typical waking hours
performances, which affect efficiency. Additionally, pre-teens who nap regularly during the day demonstrate better sleep at night. In younger children
Nap
Prion disease of the human brain
insomnia is a neurodegenerative prion disease that results in trouble sleeping as its hallmark symptom. The majority of cases are familial (fatal familial
Fatal_insomnia
Medical symptom
Non-restorative sleep (NRS), also known as unrefreshing sleep, is a subjective symptom in which sleep is experienced as insufficiently refreshing and
Non-restorative_sleep
Questionnaire that assesses sleep quality
include sleep efficiency (using sleep duration and sleep efficiency variables), perceived sleep quality (using subjective sleep quality, sleep latency
Pittsburgh Sleep Quality Index
Pittsburgh_Sleep_Quality_Index
American sleeplessness world record holder
for documentation. Coren, Stanley (1 March 2000). "Sleep Deprivation, Psychosis and Mental Efficiency". Psychiatric Times. 15 (3). Archived from the original
Randy Gardner sleep deprivation experiment
Randy_Gardner_sleep_deprivation_experiment
Neurological disorder of excessive time spent sleeping or excessive sleepiness
fatigue, and sleep problems (among other symptoms). Polysomnography shows reduced sleep efficiency and may include alpha intrusion into sleep EEG. ME/CFS
Hypersomnia
Employment practice designed for 24 hours per day / 7 days per week
exhibited significant decreased total sleep time (TST) and decreased sleep efficiency in the night shift but efficiency increased in the rest day. Between-group
Shift_work
Typically poor in duration and quality
research demonstrates that sleep duration shortens during the transition from high school to college. Additionally, sleep efficiency (the amount of time spent
Adolescent_sleep
consistent coupling of sleep disturbances such as sleep fragmentation, increased waking after sleep onset and poor sleep efficiency with vasomotor symptoms
Sleep_problems_in_women
State of consciousness between waking and sleeping
randomised controlled trial found improvements in subjective sleep latency and sleep efficiency with four weeks of yoga nidra compared to progressive muscular
Yoga_nidra
Chronic sleep disorder
Delayed sleep phase disorder (DSPD), more often known as delayed sleep phase syndrome and also as delayed sleep–wake phase disorder, is the delaying of
Delayed_sleep_phase_disorder
Medical condition
total sleep time (TST) and increased sleep deficit before morning shifts. Furthermore, the SWD group also exhibited decreased objective sleep efficiency, decrease
Shift_work_sleep_disorder
Time spent on any device with a screen
More screen time has been linked with shorter sleep duration, decreased sleep efficiency, and longer sleep onset delay. When using any screen before bedtime
Screen_time
Medical term for obsession with perfect sleep
total sleep time, sleep stages, sleep efficiency and a sleep score. Devices such as the Apple Watch and Oura Ring use sensors to estimate sleep from signals
Orthosomnia
Psychological phenomenon
procrastination duration by an average of 63.8%, with additional improvements in sleep efficiency and daytime sleepiness maintained at one-month follow-up. A subsequent
Bedtime_procrastination
Physiological nature of sleep
neuroscience of sleep is the study of the neuroscientific and physiological basis of the nature of sleep and its functions. Traditionally, sleep has been studied
Neuroscience_of_sleep
Chronic multi-symptomatic pain disorder
qualitative sleep metrics in people with fibromyalgia and healthy people. Individuals with fibromyalgia reported lower sleep quality and efficiency, longer
Fibromyalgia
Medical specialty
Sleep medicine or somnology is a medical specialty or subspecialty devoted to the diagnosis and therapy of sleep disturbances and disorders. From the middle
Sleep_medicine
Brief interruptions of sleep
active area of investigation. In a 2024 Chinese study, the average sleep efficiency was about 98%. Participants experienced roughly 47 microarousals lasting
Microarousal
Weakness of one entire side of the body
terrors, bruxism, parasomnias, EMG, Epworth Sleepiness Scale, BiPAP, sleep efficiency Ago T, Kitazono T, Ooboshi H, Takada J, Yoshiura T, Mihara F, et al
Hemiparesis
Multi-parameter study of sleep and sleep disorders
oxygen. His latency to sleep onset was slightly prolonged at 28.5 minutes. Sleep efficiency was normal at 89.3% (413.5 minutes sleep time out of 463 minutes
Polysomnography
Deliberate efforts to bring on sleep
minutes shortens the sleep onset time and improves sleep efficiency and subjective sleep quality and increases the amount of deep sleep. Sexual intercourse
Sleep_induction
US government agency
The Department of Government Efficiency (DOGE) was a federal cost-cutting initiative launched by the Republican Party in the United States during the second
Department of Government Efficiency
Department_of_Government_Efficiency
Gamma-aminobutyric acid analog
Gabapentin enhances slow-wave sleep in people with primary insomnia. It also improves sleep quality by elevating sleep efficiency and decreasing spontaneous
Gabapentin
Mental disorder
with greater sleep disturbance. Reduced total sleep time and sleep efficiency have been observed in people with OCD, with delayed sleep onset and offset
Obsessive–compulsive_disorder
Listening of music to improve sleep quality
music contributes to higher perceived sleep quality, greater sleep efficiency, longer sleep durations, less sleep disturbance, and less daytime dysfunction
Music_and_sleep
Health issue in students
movement) sleep states. Those who use stimulants report worse sleep qualities, like increased sleep onset latency and reduced sleep efficiency due to stimulants'
Sleep deprivation in higher education
Sleep_deprivation_in_higher_education
Experimental anti-insomnia drug
in people with MDD and to improve sleep onset, total sleep time, time awake after sleep onset, and sleep efficiency in people with MDD and/or insomnia
Seltorexant
Chronic medical condition
affects sleep. Individuals experience decreased sleep efficiency, take longer to fall asleep, and take longer to achieve REM sleep, a phase of sleep characterised
Myalgic encephalomyelitis/chronic fatigue syndrome
Myalgic_encephalomyelitis/chronic_fatigue_syndrome
Process of quantitatively measuring a person's sleep
difficulties with sleeping (reflected in decreased REM sleep, decreased sleep efficiency, and increased sleep latency) during their first night of sleep tracking
Sleep_tracking
Medication used to treat ADHD
with atomoxetine-oxybutynin increases sleep efficiency and the respiratory arousal threshold in obstructive sleep apnoea: A randomized trial". Respirology
Atomoxetine
Series of activity tracker devices by Google
2 relative to EEG, overestimated sleep efficiency by about 4%, but there was no difference in measured total sleep time. A 2019 review found that Fitbit
Fitbit
Age-appropriate lighting
470 nm at the eye for two hours) increased sleep efficiency for older adults who previously had difficulty sleeping. Providing white light and blue light has
Lighting_for_the_elderly
Antidepressant medication
appear to affect sleep onset, total sleep time, time awake after sleep onset, or sleep efficiency. It appears to increase deep sleep—in contrast to certain
Trazodone
Class of drugs
sleep parameters including latency to persistent sleep (LPS), wake after sleep onset (WASO), sleep efficiency (SE), total sleep time (TST), and sleep
Orexin_antagonist
Sleep disorder
estimates total sleep time (TST), sleep efficiency, and wake after sleep onset, though its accuracy for sleep-onset latency (SOL) and daytime sleep estimation
Social_jetlag
can use PSG to measure things such as total sleep time, sleep efficiency, wake after sleep onset, and sleep fragmentation. PSG can monitor various body
Sleep_and_memory
Sleep during pregnancy can be influenced by various physiological, hormonal, and psychological factors, leading to changes in sleep duration and quality
Pregnancy_and_sleep
Hypnotic medication
difference –0.074, 95% CITooltip confidence interval –0.13 to –0.02) and sleep efficiency. The clinical improvement in insomnia with ramelteon is small and of
Ramelteon
Vibratory sound made while asleep
resulted in 13% better sleep efficiency and an average of 1 hour of extra sleep for their female sleeping partners. One hour of lost sleep per day equates to
Snoring
travelled on foot, the number of floors climbed, calories burned, and sleep efficiency, and the time. Announced on September 17, 2012, the Fitbit Zip is about
List_of_Fitbit_products
Medical condition
Persisting improvements in sleep quality, sleep onset latency, increased total sleep, improvements in sleep efficiency, significant improvements in
Benzodiazepine_dependence
Mobile health company
each sleep session, Sleep Time generates a graph that allows the user to track amounts of light and deep sleep, sleep duration, and sleep efficiency. Sleep
Azumio
Non-invasive method of monitoring human rest/activity cycles
sleep consolidation (sleep efficiency), the time spent in bed, movements, and the sleep cycle. Research showed that both sleep and wake are not equally
Actigraphy
American billionaire investor
media attention for his participation in the Department of Government Efficiency. Forbes estimated his net worth at US$2.2 billion as of April 2025, while
Antonio_Gracias
Healthcare issues caused by extended use of computers
More screen-time has been linked with shorter sleep duration, decreased sleep efficiency, and longer sleep onset delay. When using any screen before bedtime
Computer-induced medical problems
Computer-induced_medical_problems
Unproven proposal of influence of lunar cycle on terrestrial creatures
the lunar cycle exhibited lower sleep efficiency and increased time awake after sleep onset compared to men whose sleep was measured during nights in the
Lunar_effect
Sleep disorder of unknown cause
sleep latency, increased mean slow wave sleep, and a high mean sleep efficiency. "Latency to REM sleep and percentages of light sleep and REM sleep were
Idiopathic_hypersomnia
people. They do not sleep much, have trouble falling asleep fast, and they have a lower sleep efficiency which might cause disturbed sleep. They have a retentive
Iranian_traditional_medicine
in an increase in sleep efficiency and duration in adults diagnosed with insomnia. The duration refers to the hours of sleep a person gets on a nightly
Benefits_of_physical_activity
Sedating antidepressant
measures of sleep maintenance, sleep duration, and sleep efficiency. Conversely, very low-dose doxepin shows relatively weak effects on sleep initiation
Doxepin
Neuropeptide
Delta-sleep-inducing peptide (DSIP) is a neuropeptide that when infused into the mesodiencephalic ventricle of recipient rabbits induces spindle and delta
Delta-sleep-inducing_peptide
Antidepressant
found in doses of 50 to 200 mg/day to significantly increase sleep efficiency and total sleep time and to decrease waking time for up to 3 weeks in patients
Trimipramine
Type of apartment
known as a studio flat (UK), self-contained apartment (Nigeria, Ghana), efficiency apartment, bed-sitter (Kenya), or bachelor apartment, is a small dwelling
Studio_apartment
Mattress industry trade association
improves sleep quality and efficiency, while reducing back, spine, shoulder and neck stiffness, thus leading to a more restful night’s sleep. The results
International Sleep Products Association
International_Sleep_Products_Association
Semiconductor light source
ultraviolet LEDs, but these devices have not yet reached the level of efficiency and technological maturity of InGaN/GaN blue/green devices. If unalloyed
Light-emitting_diode
Country in northwestern Europe
as aspects of the energy network, including renewable energy, energy efficiency and onshore oil and gas licensing. Their power over economic issues is
United_Kingdom
Building in Cambridge, England
to be energy-efficient. Its energy-saving measures include: Aggressive sleep scheduling of desktop computers. Use of a chilled-beam convection-based
William Gates Building, Cambridge
William_Gates_Building,_Cambridge
Desirable level of functional or metabolic efficiency of a living being
encouraging healthful activities, such as regular physical exercise and adequate sleep, and by reducing or avoiding unhealthful activities or situations, such
Health
Upcoming video game
character's efficiency in combat. Drinking water boosts the player's endurance, while eating food boosts their constitution. Enshrouded also has a sleep mechanic
Enshrouded
Applies an electric current to heat or cool materials
large scale (for homes or commercial buildings) is rare due to its low efficiency and high cost relative to other options. This technology is far less commonly
Thermoelectric_heat_pump
Brief history of Israeli Intelligence Community
Experienced personnel and a strong technical base ensure their high efficiency; they demonstrate an outstanding ability to collect and analyze information
History of the Israeli intelligence community
History_of_the_Israeli_intelligence_community
Drink popularised by TikTok
study from July 2023 in Current Sleep Medicine Reports suggested potential improvements in total sleep time and efficiency with tart cherry juice, but further
Sleepy_girl_mocktail
Therapy involving intentional exposure to sunlight
disorders, including seasonal affective disorder (SAD), circadian rhythm sleep-wake disorders, cancers, neonatal jaundice, and skin wound infections. Treating
Light_therapy
Argentine footballer (born 1987)
his energy for short bursts of speed, he has been able to improve his efficiency, movement, and positional play, and has been able to avoid muscular injuries
Lionel_Messi
American writer (born 1983)
the first in a follow-up duology. His first science fiction novel, To Sleep in a Sea of Stars, was published on September 15, 2020. He lives in Paradise
Christopher_Paolini
Viv (2 October 2009). "Rod Liddle: 'Maybe I was wrong to say I wouldn't sleep with Harriet Harman'". Evening Standard. Archived from the original on 6
List of British Jewish writers
List_of_British_Jewish_writers
Ongoing armed conflict in West Asia
המתוחכם שסלל את הדרך לתקיפה - בחדרי חרדים" [This is how Tehran was lulled to sleep: the sophisticated deception operation that paved the way for the attack
2026_Iran_war
Program to adjust a display to reduce eye strain
Shift, was shown to have no effect on sleep outcomes (sleep latency, duration, efficiency and wake after sleep onset) in a 2021 study on 167 college undergraduates
F.lux
Inability to sleep due to overconsumption of caffeine
sleep patterns. This can lead to other implications such as lengthening the onset of sleep latency and decrease the efficiency and duration of sleep.
Caffeine-induced sleep disorder
Caffeine-induced_sleep_disorder
United States government units targeted by the Department of Government Efficiency
During the second Trump administration, the Department of Government Efficiency (DOGE) took control of the federal government information systems in order
US federal agencies targeted by DOGE
US_federal_agencies_targeted_by_DOGE
Biological system protecting an organism against disease
movement (NREM) sleep. Thus the immune response to infection may result in changes to the sleep cycle, including an increase in slow-wave sleep relative to
Immune_system
State of tiredness, exhaustion or loss of energy
include sleep deprivation and overall health. Physical fatigue can be caused by a lack of energy in the muscle, by a decrease of the efficiency of the
Fatigue
Blue-light toxicity
benefits being for those who suffer from insomnia, bipolar disorder, delayed sleep phase disorder, or ADHD to use the glasses before bed. Blue LEDs are often
Biological effects of high-energy visible light
Biological_effects_of_high-energy_visible_light
Scientific study of sleep
Somnology is the scientific study of sleep. It includes clinical study and treatment of sleep disorders and irregularities. Sleep medicine is a subset of somnology
Somnology
President of the United States (2017–2021; since 2025)
racial discrimination. Trump and Elon Musk's Department of Government Efficiency largely dismantled several federal agencies including USAID and the Department
Donald_Trump
Kamau Bell N/A Samantha Power discusses the Department of Government Efficiency's intention of shutting down the United States Agency for International
List of The Late Show with Stephen Colbert episodes (2025)
List_of_The_Late_Show_with_Stephen_Colbert_episodes_(2025)
Psychology topic
strenuous exercise, live with a partner, do religious or group activities and sleep for eight hours a night." Happiness does however seem to have a protective
Well-being contributing factors
Well-being_contributing_factors
Award
Plymouth Police Force. For services to Civil Defence. William Henry Elsmore, Efficiency Production Engineer, British Tool & Engineering Company Ltd. Ernest Embley
1946 New Year Honours (British Empire Medal)
1946_New_Year_Honours_(British_Empire_Medal)
Type of military railroad passenger car
constructed to serve as something of a mobile barracks (essentially, a sleeping car) for transporting troops over distances sufficient to require overnight
Troop_sleeper
1927 novel by Edith Wharton
"Domestic Novels of the 1920s: Regulation and Efficiency in The Home-Maker, Twilight Sleep, and Too Much Efficiency". American Studies. 52 (2): 65–88, 189.
Twilight_Sleep_(novel)
Line of smartwatches
Bionic with a faster GPU and a four-core Neural Engine, improved power efficiency, and a second-generation Ultrawide Band chip (shared with iPhone 15) with
Apple_Watch
Wetland in Indiana and Illinois, United States
muzzleloaders. The introduction of the breechloader increased hunting efficiency, facilitating the rapid slaughter of wildlife. Shooting accidents became
Grand_Kankakee_Marsh
American financier, banker, and art collector (1837–1913)
Morgan as America's "greatest banker". Morgan died in Rome, Italy, in his sleep in 1913 at the age of 75, leaving his fortune and business to his son, J
J._P._Morgan
Species of flowering plant in the poppy family
requires technological knowledge from the farmer. In order to increase the efficiency of weed control not only chemical weed control should be applied but also
Papaver_somniferum
Traditional clothing worn by the Yup'ik people of Alaska
meets the challenge of weather, season, terrain and function with maximum efficiency, comfort and durability. Sole of boot (alu ~ aluq sg aluk dual alut pl
Yupʼik_clothing
capable of prolonged flights as long as it alternated periods of high-efficiency gliding with active flapping, is presented by Chiappe et al. (2023). An
2023 in archosaur paleontology
2023_in_archosaur_paleontology
Northern Irish police drama television series
Lights' sophomore season adheres to formula but does so with the utmost efficiency and panache". Jack Seale of The Guardian gave the series four out of five
Blue_Lights_(2023_TV_series)
Electric light that produces light using LEDs
fluorescent lamps. The most efficient commercially available LED lamps have efficiencies exceeding 200 lumens per watt (lm/W) and convert more than half the input
LED_lamp
Programming language
typed and compiled. It is known for the simplicity of its syntax and the efficiency of development that it enables through the inclusion of a large standard
Go_(programming_language)
iOS and macOS software feature
screen) was shown to have no effect on sleep outcomes (sleep latency, duration, efficiency and wake after sleep onset) in a 2021 study on 167 college undergraduates
Night_Shift_(software)
Genus of Old World monkeys
generally do not sleep near other groups. They also tend to sleep more tightly together on nights with great visibility. They sleep in mid- to upper sections
Black-and-white_colobus
Union Army Medal of Honor recipient
of the steady stream of the Army of Tennessee's ensuing defeats. The efficiency of the United States' railroads over the Confederacy's effectively canceled
Henry_B._Mattingly
SLEEP EFFICIENCY
SLEEP EFFICIENCY
Girl/Female
American, Australian, British, English
Sheep
Surname or Lastname
English (mainly Devon)
English (mainly Devon) : variant of Slape.
Boy/Male
Greek
God of sleep.
Girl/Female
Hindu
Sleep, Night
Girl/Female
Tamil
Sleep
Girl/Female
Bengali, Indian
Sleep
Girl/Female
Hindu
Sleep
Girl/Female
Hindu, Indian
Sleep
Girl/Female
Australian, Indian, Tamil
Sleep
Girl/Female
Hindu, Indian, Kannada, Malayalam, Marathi, Telugu
Sun; Sleep
Surname or Lastname
English
English : unexplained.
Boy/Male
American, Australian, French, German, Portuguese
Sheep
Girl/Female
Christian, Finnish, French, German, Hebrew, Indian, Swedish
Ewe; Sheep; Female Sheep
Girl/Female
Assamese, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Telugu
Sleep
Girl/Female
Tamil
Sleep, Night
Girl/Female
Tamil
Sleep
Surname or Lastname
English
English : variant of Sly.
Girl/Female
Indian
Goddess of sleep.
Girl/Female
Indian, Sanskrit
Meditation Sleep
Boy/Male
Latin
Sleep.
SLEEP EFFICIENCY
SLEEP EFFICIENCY
Girl/Female
Teutonic American African Native American Latin English
Famous in war.
Female
English
Perhaps a form of English Edith, AIDITH means "rich battle."
Male
Native American
Native American Omaha name GUDAHI means "there it (a coyote) goes!"
Boy/Male
Latin Italian
Blessed.
Boy/Male
Australian, Latin
Father of the Sky; Form of Jovan
Female
English
Pet form of English Elizabeth, BETTY means "God is my oath."
Boy/Male
American, Australian, British, Chinese, Christian, English, French, German, Greek, Hebrew, Irish, Jewish, Portuguese, Spanish
French Form of Julius; Shining Pledge; Short for Names Beginning with Gil; Kid; Young Goat; Serves Christ; Joy; Happiness; Squire Young Shield
Girl/Female
Indian
Girl/Female
Danish German Scandinavian
Male
Welsh
Welsh name HENWAS means "old servant."
SLEEP EFFICIENCY
SLEEP EFFICIENCY
SLEEP EFFICIENCY
SLEEP EFFICIENCY
SLEEP EFFICIENCY
a.
Disposed to sleep; sleepy; drowsy.
a.
Strongly inclined to sleep; very sleepy.
a.
Causing sleep; sleepy.
v. t.
To give sleep to; to furnish with accomodations for sleeping; to lodge.
n.
Tending to induce sleep; soporiferous; somniferous; as, a sleepy drink or potion.
v. t.
To be slumbering in; -- followed by a cognate object; as, to sleep a dreamless sleep.
v. i.
To be, or appear to be, in repose; to be quiet; to be unemployed, unused, or unagitated; to rest; to lie dormant; as, a question sleeps for the present; the law sleeps.
n.
Drowsy; inclined to, or overcome by, sleep.
a.
Sleepy; drowsy; inclined to sleep.
a. & adv.
In a state of sleep; in sleep; dormant.
v. t.
Making a large angle with the plane of the horizon; ascending or descending rapidly with respect to a horizontal line or a level; precipitous; as, a steep hill or mountain; a steep roof; a steep ascent; a steep declivity; a steep barometric gradient.
n.
The compass of any turning body or of any motion; as, the sweep of a door; the sweep of the eye.
a.
Heavy with sleep.
v. t.
Excessive; as, a steep price.
a.
Inclined to sleep; sleepy; as, to feel nappy.
a.
Inclined to sleep; drowsy; sleepy.
a. & adv.
In the sleep of the grave; dead.
v. t.
To lay asleep; to put to sleep; to quiet.