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Apnea, Bariatric surgery, and CPAP study

Name Label Folder
nsrrid
NSRR subject identifier
NSRR subject identifier

The National Sleep Research Resource (NSRR) subject identifier links the subject's data and files.

Administrative
rand_siteid
Site identifier
Site identifier

Recruitment site was a stratification factor for randomization.

Administrative
rand_treatmentarm
Randomized treatment arm
Randomized treatment arm Administrative
visitnumber
Visit number
Visit number Administrative
bmi
Body mass index (BMI)
Body mass index (BMI) Anthropometry
age
Age of the participant
Age of the participant Demographics
ethnicity
Ethnicity (Hispanic or Latino) of the participant
Ethnicity (Hispanic or Latino) of the participant

"Hispanic or Latino" is defined as a person of Cuban, Mexican, Puerto Rican, South or Central American or other Spanish culture or origin regardless of race.

Demographics
gender
Gender of the participant
Gender of the participant Demographics
race
Race of the participant
Race of the participant Demographics
nsrr_bmi
Body mass index (BMI)
Body mass index (BMI)

Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: bmi at Baseline

Harmonized/Anthropometry
nsrr_age
Subject age
Subject age

Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: age at Baseline

Harmonized/Demographics
nsrr_age_gt89
Indicates whether the subject's age (in years) used during date obfuscation is greater than 89 years
Indicates whether the subject's age (in years) used during date obfuscation is greater than 89 years

Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: age at Baseline

Harmonized/Demographics
nsrr_ethnicity
Subject ethnicity
Subject ethnicity

Original missing value is recoded as "not reported".

Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: ethnicity at Baseline

Harmonized/Demographics
nsrr_race
Subject race
Subject race

Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: race at Baseline

Harmonized/Demographics
nsrr_sex
Subject sex
Subject sex

Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: gender at Baseline

Harmonized/Demographics
nsrr_ahi_hp3r_aasm15
Apnea-Hypopnea Index : (All apneas + hypopneas with >=30% nasal cannula [or alternative sensor] reduction and >= 3% oxygen desaturation or with arousal) / hour of sleep
Apnea-Hypopnea Index : (All apneas + hypopneas with >=30% nasal cannula [or alternative sensor] reduction and >= 3% oxygen desaturation or with arousal) / hour of sleep

Harmonized by the NSRR team.

The definition for hypopneas is consistent with the following clinical guidelines: (1) American Academy of Sleep Medicine (AASM) 2007 Manual (2012 update) (recommended). Berry RB et al. 2012 (PubMed ID:23066376), and (2) American Academy of Sleep Medicine (AASM) 2015 (recommended) [Berry RB et al. The AASM Manual for the Scoring of Sleep and Associated Events: Rules, Terminology and Technical Specifications, Version 2.2. American Academy of Sleep Medicine, Darien, IL, 2015.]

Refer to the source for detailed definition for respiratory events: ahi_ap0uhp3x3r_f1t1

Harmonized/Polysomnography/Apnea-Hypopnea Indices
nsrr_ahi_hp3u
Apnea-Hypopnea Index : (All apneas + hypopneas with >= 3% oxygen desaturation) / hour of sleep
Apnea-Hypopnea Index : (All apneas + hypopneas with >= 3% oxygen desaturation) / hour of sleep

Harmonized by the NSRR team. Refer to the source for detailed definition for respiratory events: ahi_ap0uhp3x3u_f1t1

Harmonized/Polysomnography/Apnea-Hypopnea Indices
nsrr_ahi_hp4r
Apnea-Hypopnea Index : (All apneas + hypopneas with >= 4% oxygen desaturation or with arousal) / hour of sleep
Apnea-Hypopnea Index : (All apneas + hypopneas with >= 4% oxygen desaturation or with arousal) / hour of sleep

Harmonized by the NSRR team. Refer to the source for detailed definition for respiratory events: ahi_ap0uhp3x4r_f1t1

Harmonized/Polysomnography/Apnea-Hypopnea Indices
nsrr_ahi_hp4u_aasm15
Apnea-Hypopnea Index : (All apneas + hypopneas with >=30% nasal cannula [or alternative sensor] reduction with >= 4% oxygen desaturation) / hour of sleep
Apnea-Hypopnea Index : (All apneas + hypopneas with >=30% nasal cannula [or alternative sensor] reduction with >= 4% oxygen desaturation) / hour of sleep

Harmonized by the NSRR team.

The definition of hypopnea events is consistent with the following clinical guidelines: (1) AASM 2012 update (alternative) Berry RB et al. 2012 (PubMed ID:23066376), and (2) AASM 2015 (acceptable) [Berry RB et al. The AASM Manual for the Scoring of Sleep and Associated Events: Rules, Terminology and Technical Specifications, Version 2.2. American Academy of Sleep Medicine, Darien, IL, 2015.].

Refer to the source for detailed definition for respiratory events: ahi_ap0uhp3x4u_f1t1

Harmonized/Polysomnography/Apnea-Hypopnea Indices
nsrr_ttldursp_f1
Total Sleep Duration: the interval between sleep onset and sleep offset while the participant is asleep from polysomnography
Total Sleep Duration: the interval between sleep onset and sleep offset while the participant is asleep from polysomnography

Conventionally, this would be called total sleep time (TST) (i.e. total time spent in stage 1 or greater).

Harmonized by the NSRR team. Source: ttldursp_f1t1

Harmonized/Polysomnography/Sleep Architecture
ahi_ap0uhp3x3u_f1t1
Apnea-Hypopnea Index: (All apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation and with or without arousal) / hour of sleep from type I polysomnography
Apnea-Hypopnea Index: (All apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation and with or without arousal) / hour of sleep from type I polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography
ahi_ap0uhp3x4u_f1t1
Apnea-Hypopnea Index: (All apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type I polysomnography
Apnea-Hypopnea Index: (All apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type I polysomnography

Calculated - Summary metric of sleep disordered breathing events. The definition of hypopnea events is consistent with the following clinical guidelines: (1) AASM 2012 update (alternative) Berry RB et al. 2012 (PubMed ID:23066376), and (2) AASM 2015 (acceptable) [Berry RB et al. The AASM Manual for the Scoring of Sleep and Associated Events: Rules, Terminology and Technical Specifications, Version 2.2. American Academy of Sleep Medicine, Darien, IL, 2015.].

Search for all AHI variables consistent with the same clinical guidelines within this dataset

Sleep Monitoring/Polysomnography
pctdursp_salt90_f1t1
Percent of total sleep duration with oxygen saturation < 90% from type I polysomnography
Percent of total sleep duration with oxygen saturation < 90% from type I polysomnography

Sleep duration is the interval between sleep onset time and lights on/out-bed time while asleep, conventionally called total sleep time.

Sleep Monitoring/Polysomnography
ttldursp_f1t1
Total sleep duration from type I polysomnography
Total sleep duration from type I polysomnography

Sleep duration is the interval between sleep onset time and lights on/out-bed time while asleep, conventionally called total sleep time

Sleep Monitoring/Polysomnography
ess_total
Epworth Sleepiness Scale: Total score
Epworth Sleepiness Scale: Total score

Calculated - Total score based on an 8-item questionnaires ranking likelihood of dozing off Johns MW 1991 (PubMed ID: 1798888). Scale 0-3 for individual items; 0 to 24 for overall score.

Search for all ESS variables within this dataset

Sleep Questionnaires/Hypersomnia/Epworth Sleepiness Scale (ESS)
daystomonth09
Days from baseline to 9-month visit
Days from baseline to 9-month visit Administrative
daystomonth18
Days from baseline to 18-month visit
Days from baseline to 18-month visit Administrative
daystosurgery
Days from baseline to laparoscopic gastric banding (LGB) surgery
Days from baseline to laparoscopic gastric banding (LGB) surgery Administrative
surgery_occurred
Surgery occurred
Surgery occurred

The subject underwent laparoscopic gastric banding (LGB) surgery.

Administrative
height
Height
Height Anthropometry
weight
Weight
Weight Anthropometry
active_ghrelin
Active Ghrelin
Active Ghrelin Clinical Data/Laboratory Tests
adiponectin_hmw
Adiponectin - HMW
Adiponectin - HMW Clinical Data/Laboratory Tests
adiponectin_total
Adiponectin - Total
Adiponectin - Total Clinical Data/Laboratory Tests
bloods_creactivepro
C-Reactive Protein, Cardiac
C-Reactive Protein, Cardiac Clinical Data/Laboratory Tests
bloods_datetest
Date of Test
Date of Test Clinical Data/Laboratory Tests
bloods_fibrinactivity
Fibrinogen Activity
Fibrinogen Activity Clinical Data/Laboratory Tests
bloods_hdlchol
HDL Cholesterol
HDL Cholesterol Clinical Data/Laboratory Tests
bloods_hemoa1c
Hemoglobin A1c
Hemoglobin A1c Clinical Data/Laboratory Tests
bloods_ldlcholcalc
LDL Cholesterol Calc
LDL Cholesterol Calc Clinical Data/Laboratory Tests
bloods_serumgluc
Glucose, Serum
Glucose, Serum Clinical Data/Laboratory Tests
bloods_studyvisit
Study Visit
Study Visit Clinical Data/Laboratory Tests
bloods_totalchol
Cholesterol, Total
Cholesterol, Total Clinical Data/Laboratory Tests
bloods_triglyc
Triglycerides
Triglycerides Clinical Data/Laboratory Tests
bloods_urinecreatin
Creatinine, Urine
Creatinine, Urine Clinical Data/Laboratory Tests
bloods_urinemicro
Microalbumin, Urine
Microalbumin, Urine Clinical Data/Laboratory Tests
bloods_vldlcholcal
VLDL Cholesterol Cal
VLDL Cholesterol Cal Clinical Data/Laboratory Tests
epinephrine
Epinephrine
Epinephrine Clinical Data/Laboratory Tests
il6
Il-6
Il-6 Clinical Data/Laboratory Tests
insulin
Insulin
Insulin Clinical Data/Laboratory Tests
leptin
Leptin
Leptin Clinical Data/Laboratory Tests
leptin_ceiling
Leptin was at ceiling (>100)
Leptin was at ceiling (>100) Clinical Data/Laboratory Tests
norepinephrine
Norepinephrine
Norepinephrine Clinical Data/Laboratory Tests
pai1
Pai-1
Pai-1 Clinical Data/Laboratory Tests
pai1_ceiling
PAI-1 was at ceiling (>20)
PAI-1 was at ceiling (>20) Clinical Data/Laboratory Tests
probnp
proBNP
proBNP Clinical Data/Laboratory Tests
resistin
Resistin
Resistin Clinical Data/Laboratory Tests
uacr
Urine albumin / urine creatinine ratio
Urine albumin / urine creatinine ratio

(bloods_urinemicro / bloods_urinecreatin) * 100

Clinical Data/Laboratory Tests
uepicr
Urine epinephrine / urine creatinine ratio
Urine epinephrine / urine creatinine ratio

(epinephrine / bloods_urinecreatin) / 10

Clinical Data/Laboratory Tests
unorepicr
Urine norepinephrine / urine creatinine ratio
Urine norepinephrine / urine creatinine ratio

(norepinephrine / bloods_urinecreatin) / 10

Clinical Data/Laboratory Tests
giqli_emot
Gastrointestinal Quality of Life Index: Emotions subscore
Gastrointestinal Quality of Life Index: Emotions subscore

The subscale score is based on 5 items from the Gastrointestinal Quality of Life Index. A high score suggests better emotional status. Eypasch E et al.,1995 (PubMed ID: 7749697)

Search for all GIQLI variables within this dataset

General Health/Gastrointestinal Quality of Life Index
giqli_emot_w
Gastrointestinal Quality of Life Index: Emotions subscore (weighted)
Gastrointestinal Quality of Life Index: Emotions subscore (weighted)

The subscale score is based on 5 items from the Gastrointestinal Quality of Life Index. A high score suggests better emotional status. Eypasch E et al.,1995 (PubMed ID: 7749697)

Search for all GIQLI variables within this dataset

General Health/Gastrointestinal Quality of Life Index
giqli_med
Gastrointestinal Quality of Life Index: Medical treatment subscore
Gastrointestinal Quality of Life Index: Medical treatment subscore

The subscale score is based on one item from the Gastrointestinal Quality of Life Index. A high score suggests less medical treatment. Eypasch E et al.,1995 (PubMed ID: 7749697)

Search for all GIQLI variables within this dataset

General Health/Gastrointestinal Quality of Life Index
giqli_namecode
Namecode
Namecode General Health/Gastrointestinal Quality of Life Index
giqli_phys
Gastrointestinal Quality of Life Index: Physical function subscore
Gastrointestinal Quality of Life Index: Physical function subscore

The subscale score is based on 7 items from the Gastrointestinal Quality of Life Index. A high score suggests better physical function. Eypasch E et al.,1995 (PubMed ID: 7749697)

Search for all GIQLI variables within this dataset

General Health/Gastrointestinal Quality of Life Index
giqli_phys_w
Gastrointestinal Quality of Life Index: Physical function subscore (weighted)
Gastrointestinal Quality of Life Index: Physical function subscore (weighted)

The subscale score is based on 7 items from the Gastrointestinal Quality of Life Index. A high score suggests better physical function. Eypasch E et al.,1995 (PubMed ID: 7749697)

Search for all GIQLI variables within this dataset

General Health/Gastrointestinal Quality of Life Index
giqli_social
Gastrointestinal Quality of Life Index: Social function subscore
Gastrointestinal Quality of Life Index: Social function subscore

The subscale score is based on 4 items from the Gastrointestinal Quality of Life Index. A high score suggests better social function. Eypasch E et al.,1995 (PubMed ID: 7749697)

Search for all GIQLI variables within this dataset

General Health/Gastrointestinal Quality of Life Index
giqli_social_w
Gastrointestinal Quality of Life Index: Social function subscore (weighted)
Gastrointestinal Quality of Life Index: Social function subscore (weighted)

The subscale score is based on 4 items from the Gastrointestinal Quality of Life Index. A high score suggests better social function. Eypasch E et al.,1995 (PubMed ID: 7749697)

Search for all GIQLI variables within this dataset

General Health/Gastrointestinal Quality of Life Index
giqli_studyvisit
Study ID
Study ID General Health/Gastrointestinal Quality of Life Index
giqli_symp
Gastrointestinal Quality of Life Index: Symptoms subscore
Gastrointestinal Quality of Life Index: Symptoms subscore

The subscale score is based on 19 items from the Gastrointestinal Quality of Life Index. A high score suggests fewer symptoms. Eypasch E et al.,1995 (PubMed ID: 7749697)

Search for all GIQLI variables within this dataset

General Health/Gastrointestinal Quality of Life Index
giqli_symp_w
Gastrointestinal Quality of Life Index: Symptoms subscore (weighted)
Gastrointestinal Quality of Life Index: Symptoms subscore (weighted)

The subscale score is based on 19 items from the Gastrointestinal Quality of Life Index. A high score suggests fewer symptoms. Eypasch E et al.,1995 (PubMed ID: 7749697)

Search for all GIQLI variables within this dataset

General Health/Gastrointestinal Quality of Life Index
giqli_total
Gastrointestinal Quality of Life Index: Global score
Gastrointestinal Quality of Life Index: Global score

The total score is based on four subscale scores from the Gastrointestinal Quality of Life Index. A high score suggests better health-related quality of life. Eypasch E et al.,1995 (PubMed ID: 7749697)

Search for all GIQLI variables within this dataset

General Health/Gastrointestinal Quality of Life Index
giqli_total_w
Gastrointestinal Quality of Life Index: Global score (weighted)
Gastrointestinal Quality of Life Index: Global score (weighted)

The total score is based on four subscale scores from the Gastrointestinal Quality of Life Index. A high score suggests better health-related quality of life. Eypasch E et al.,1995 (PubMed ID: 7749697)

Search for all GIQLI variables within this dataset

General Health/Gastrointestinal Quality of Life Index
ahi_ap0uhp3x3r_f1t1
Apnea-Hypopnea Index: (All apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation or with arousal) / hour of sleep from type I polysomnography
Apnea-Hypopnea Index: (All apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation or with arousal) / hour of sleep from type I polysomnography

Calculated - Summary metric of sleep disordered breathing events. The definition for hypopneas is consistent with the following clinical guidelines: (1) American Academy of Sleep Medicine (AASM) 2007 Manual (2012 update) (recommended). Berry RB et al. 2012 (PubMed ID:23066376), and (2) American Academy of Sleep Medicine (AASM) 2015 (recommended) [Berry RB et al. The AASM Manual for the Scoring of Sleep and Associated Events: Rules, Terminology and Technical Specifications, Version 2.2. American Academy of Sleep Medicine, Darien, IL, 2015.]

Search for all AHI variables consistent with the same clinical guidelines within this dataset

Sleep Monitoring/Polysomnography
ahi_ap0uhp3x4r_f1t1
Apnea-Hypopnea Index: (All apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation or with arousal) / hour of sleep from type I polysomnography
Apnea-Hypopnea Index: (All apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation or with arousal) / hour of sleep from type I polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography
avglvlhr_f1t1
Average heart rate during total sleep duration from type I polysomnography
Average heart rate during total sleep duration from type I polysomnography Sleep Monitoring/Polysomnography
avglvlsa_f1t1
Average oxygen saturation level in total sleep duration from type I polysomnography
Average oxygen saturation level in total sleep duration from type I polysomnography Sleep Monitoring/Polysomnography
cahi_ca0uhp3x3r_f1t1
Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with > 3% desaturation or with arousal) / hour of sleep from type I polysomnography
Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with > 3% desaturation or with arousal) / hour of sleep from type I polysomnography

Calculated - Summary metric of sleep disordered breathing events. The definition for hypopneas is consistent with the following clinical guidelines: (1) American Academy of Sleep Medicine (AASM) 2007 Manual (2012 update) (recommended). Berry RB et al. 2012 (PubMed ID:23066376), and (2) American Academy of Sleep Medicine (AASM) 2015 (recommended) [Berry RB et al. The AASM Manual for the Scoring of Sleep and Associated Events: Rules, Terminology and Technical Specifications, Version 2.2. American Academy of Sleep Medicine, Darien, IL, 2015.]

Search for all AHI variables consistent with the same clinical guidelines within this dataset

Sleep Monitoring/Polysomnography
cahi_ca0uhp3x3u_f1t1
Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with > 3% desaturation and with or without arousal) / hour of sleep from type I polysomnography from type I polysomnography
Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with > 3% desaturation and with or without arousal) / hour of sleep from type I polysomnography from type I polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography
cahi_ca0uhp3x4r_f1t1
Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with > 4% desaturation or with arousal) / hour of sleep from type I polysomnography
Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with > 4% desaturation or with arousal) / hour of sleep from type I polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography
cahi_ca0uhp3x4u_f1t1
Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with > 4% desaturation and with or without arousal) / hour of sleep from type I polysomnography
Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with > 4% desaturation and with or without arousal) / hour of sleep from type I polysomnography

Calculated - Summary metric of sleep disordered breathing events. The definition of hypopnea events is consistent with the following clinical guidelines: (1) AASM 2012 update (alternative) Berry RB et al. 2012 (PubMed ID:23066376), and (2) AASM 2015 (acceptable) [Berry RB et al. The AASM Manual for the Scoring of Sleep and Associated Events: Rules, Terminology and Technical Specifications, Version 2.2. American Academy of Sleep Medicine, Darien, IL, 2015.].

Search for all AHI variables consistent with the same clinical guidelines within this dataset

Sleep Monitoring/Polysomnography
cai_ca0u_f1t1
Central Apnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal) / hour of sleep from type I polysomnography
Central Apnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal) / hour of sleep from type I polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography
hi_hp3x0u_f1t1
Hypopnea Index: (hypopneas with > 30% flow reduction and with no oxygen desaturation threshold used and with or without arousal) / hour of sleep from type I polysomnography
Hypopnea Index: (hypopneas with > 30% flow reduction and with no oxygen desaturation threshold used and with or without arousal) / hour of sleep from type I polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography
minlvlsa_f1t1
Minimum oxygen saturation level in total sleep duration from type I polysomnography
Minimum oxygen saturation level in total sleep duration from type I polysomnography Sleep Monitoring/Polysomnography
oahi_oa0uhp3x3r_f1t1
Obstructive Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation or with arousal) / hour of sleep from type I polysomnography
Obstructive Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation or with arousal) / hour of sleep from type I polysomnography

Calculated - Summary metric of sleep disordered breathing events. The definition for hypopneas is consistent with the following clinical guidelines: (1) American Academy of Sleep Medicine (AASM) 2007 Manual (2012 update) (recommended). Berry RB et al. 2012 (PubMed ID:23066376), and (2) American Academy of Sleep Medicine (AASM) 2015 (recommended) [Berry RB et al. The AASM Manual for the Scoring of Sleep and Associated Events: Rules, Terminology and Technical Specifications, Version 2.2. American Academy of Sleep Medicine, Darien, IL, 2015.]

Search for all AHI variables consistent with the same clinical guidelines within this dataset

Sleep Monitoring/Polysomnography
oahi_oa0uhp3x3u_f1t1
Obstructive Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation and with or without arousal) / hour of sleep from type I polysomnography
Obstructive Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation and with or without arousal) / hour of sleep from type I polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography
oahi_oa0uhp3x4r_f1t1
Obstructive Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation or with arousal) / hour of sleep from type I polysomnography
Obstructive Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation or with arousal) / hour of sleep from type I polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography
oahi_oa0uhp3x4u_f1t1
Obstructive Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type I polysomnography
Obstructive Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type I polysomnography

Calculated - Summary metric of sleep disordered breathing events. The definition of hypopnea events is consistent with the following clinical guidelines: (1) AASM 2012 update (alternative) Berry RB et al. 2012 (PubMed ID:23066376), and (2) AASM 2015 (acceptable) [Berry RB et al. The AASM Manual for the Scoring of Sleep and Associated Events: Rules, Terminology and Technical Specifications, Version 2.2. American Academy of Sleep Medicine, Darien, IL, 2015.].

Search for all AHI variables consistent with the same clinical guidelines within this dataset

Sleep Monitoring/Polysomnography
oai_oa0u_f1t1
Obstructive Apnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal) / hour of sleep from type I polysomnography
Obstructive Apnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal) / hour of sleep from type I polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography
pctdursp_s1_f1t1
Percent of total sleep duration in stage 1 sleep from type I polysomnography
Percent of total sleep duration in stage 1 sleep from type I polysomnography

Sleep duration is the interval between sleep onset time and lights on/out-bed time while asleep, conventionally called total sleep time.

Sleep Monitoring/Polysomnography
pctdursp_s2_f1t1
Percent of total sleep duration in stage 2 sleep from type I polysomnography
Percent of total sleep duration in stage 2 sleep from type I polysomnography

Sleep duration is the interval between sleep onset time and lights on/out-bed time while asleep, conventionally called total sleep time.

Sleep Monitoring/Polysomnography
pctdursp_s3_f1t1
Percent of total sleep duration in stage 3 - 4 sleep from type I polysomnography
Percent of total sleep duration in stage 3 - 4 sleep from type I polysomnography

Sleep duration is the interval between sleep onset time and lights on/out-bed time while asleep, conventionally called total sleep time.

Sleep Monitoring/Polysomnography
pctdursp_salt75_f1t1
Percent of total sleep duration with oxygen saturation < 75% from type I polysomnography
Percent of total sleep duration with oxygen saturation < 75% from type I polysomnography

Sleep duration is the interval between sleep onset time and lights on/out-bed time while asleep, conventionally called total sleep time.

Sleep Monitoring/Polysomnography
pctdursp_salt80_f1t1
Percent of total sleep duration with oxygen saturation < 80% from type I polysomnography
Percent of total sleep duration with oxygen saturation < 80% from type I polysomnography

Sleep duration is the interval between sleep onset time and lights on/out-bed time while asleep, conventionally called total sleep time.

Sleep Monitoring/Polysomnography
pctdursp_salt85_f1t1
Percent of total sleep duration with oxygen saturation < 85% from type I polysomnography
Percent of total sleep duration with oxygen saturation < 85% from type I polysomnography

Sleep duration is the interval between sleep onset time and lights on/out-bed time while asleep, conventionally called total sleep time.

Sleep Monitoring/Polysomnography
pctdursp_sr_f1t1
Percent of sleep time in REM sleep from type I polysomnography
Percent of sleep time in REM sleep from type I polysomnography Sleep Monitoring/Polysomnography
ttldursp_s1_f1t1
Total sleep duration in stage 1 sleep from type I polysomnography
Total sleep duration in stage 1 sleep from type I polysomnography Sleep Monitoring/Polysomnography
ttldursp_s2_f1t1
Total sleep duration in stage 2 sleep from type I polysomnography
Total sleep duration in stage 2 sleep from type I polysomnography Sleep Monitoring/Polysomnography
ttldursp_s3_f1t1
Total sleep duration in stage 3 - 4 sleep from type I polysomnography
Total sleep duration in stage 3 - 4 sleep from type I polysomnography Sleep Monitoring/Polysomnography
ttldursp_sr_f1t1
Total sleep duration in REM sleep from type I polysomnography
Total sleep duration in REM sleep from type I polysomnography Sleep Monitoring/Polysomnography