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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)

Calculated

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

Race is presented as three (3) categories based on suggested Biologic Specimen and Data Repository Information Coordinating Center (BioLINCC) de-identification procedures.

Demographics
ahi_a0uh3x3u
Apnea-Hypopnea Index: (all apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% airflow reduction and with > 3% desaturation and with or without arousal) / hour of sleep
Apnea-Hypopnea Index: (all apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% airflow reduction and with > 3% desaturation and with or without arousal) / hour of sleep

Calculated

Polysomnography (PSG)
ahi_a0uh3x4u
Apnea-Hypopnea Index: (all apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% airflow reduction and with > 4% desaturation and with or without arousal) / hour of sleep
Apnea-Hypopnea Index: (all apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% airflow reduction and with > 4% desaturation and with or without arousal) / hour of sleep

Calculated

Polysomnography (PSG)
slppcto2lt90
Percent of sleep time with oxygen saturation < 90%
Percent of sleep time with oxygen saturation < 90% Polysomnography (PSG)
slptimetotal
Total sleep time
Total sleep time Polysomnography (PSG)
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. All ESS variables from this study

Questionnaires/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
ahi_a0uh3x3r
Apnea-Hypopnea Index: (all apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% airflow reduction and with > 3% desaturation or with arousal) / hour of sleep
Apnea-Hypopnea Index: (all apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% airflow reduction and with > 3% desaturation or with arousal) / hour of sleep

Calculated

Polysomnography (PSG)
ahi_a0uh3x4r
Apnea-Hypopnea Index: (all apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% airflow reduction and with > 4% desaturation or with arousal) / hour of sleep
Apnea-Hypopnea Index: (all apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% airflow reduction and with > 4% desaturation or with arousal) / hour of sleep

Calculated

Polysomnography (PSG)
avghr
Average heart rate during sleep time
Average heart rate during sleep time Polysomnography (PSG)
avgsat
Average oxygen saturation during sleep time
Average oxygen saturation during sleep time Polysomnography (PSG)
cahi_c0uh3x3r
Central Apnea-Hypopnea Index: (central apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% airflow reduction and with > 3% desaturation or with arousal) / hour of sleep
Central Apnea-Hypopnea Index: (central apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% airflow reduction and with > 3% desaturation or with arousal) / hour of sleep

Calculated

Polysomnography (PSG)
cahi_c0uh3x3u
Central Apnea-Hypopnea Index: (central apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% airflow reduction and with > 3% desaturation and with or without arousal) / hour of sleep
Central Apnea-Hypopnea Index: (central apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% airflow reduction and with > 3% desaturation and with or without arousal) / hour of sleep

Calculated

Polysomnography (PSG)
cahi_c0uh3x4r
Central Apnea-Hypopnea Index: (central apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% airflow reduction and with > 4% desaturation or with arousal) / hour of sleep
Central Apnea-Hypopnea Index: (central apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% airflow reduction and with > 4% desaturation or with arousal) / hour of sleep

Calculated

Polysomnography (PSG)
cahi_c0uh3x4u
Central Apnea-Hypopnea Index: (central apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% airflow reduction and with > 4% desaturation and with or without arousal) / hour of sleep
Central Apnea-Hypopnea Index: (central apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% airflow reduction and with > 4% desaturation and with or without arousal) / hour of sleep

Calculated

Polysomnography (PSG)
cai_c0u
Central Apnea Index: central apneas with no oxygen desaturation threshold used and with or without arousal / hour of sleep
Central Apnea Index: central apneas with no oxygen desaturation threshold used and with or without arousal / hour of sleep

Calculated

Polysomnography (PSG)
hi_h3x0u
Hypopnea Index: hypopneas with >30% airflow reduction and with no oxygen desaturation threshold used and with or without arousal / hour of sleep
Hypopnea Index: hypopneas with >30% airflow reduction and with no oxygen desaturation threshold used and with or without arousal / hour of sleep

Calculated

Polysomnography (PSG)
minsat
Minimum oxygen saturation during sleep time
Minimum oxygen saturation during sleep time Polysomnography (PSG)
oahi_o0uh3x3r
Obstructive Apnea-Hypopnea Index: (obstructive apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% airflow reduction and with > 3% desaturation or with arousal) / hour of sleep
Obstructive Apnea-Hypopnea Index: (obstructive apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% airflow reduction and with > 3% desaturation or with arousal) / hour of sleep

Calculated

Polysomnography (PSG)
oahi_o0uh3x3u
Obstructive Apnea-Hypopnea Index: (obstructive apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% airflow reduction and with > 3% desaturation and with or without arousal) / hour of sleep
Obstructive Apnea-Hypopnea Index: (obstructive apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% airflow reduction and with > 3% desaturation and with or without arousal) / hour of sleep

Calculated

Polysomnography (PSG)
oahi_o0uh3x4r
Obstructive Apnea-Hypopnea Index: (obstructive apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% airflow reduction and with > 4% desaturation or with arousal) / hour of sleep
Obstructive Apnea-Hypopnea Index: (obstructive apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% airflow reduction and with > 4% desaturation or with arousal) / hour of sleep

Calculated

Polysomnography (PSG)
oahi_o0uh3x4u
Obstructive Apnea-Hypopnea Index: (obstructive apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% airflow reduction and with > 4% desaturation and with or without arousal) / hour of sleep
Obstructive Apnea-Hypopnea Index: (obstructive apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% airflow reduction and with > 4% desaturation and with or without arousal) / hour of sleep

Calculated

Polysomnography (PSG)
oai_o0u
Obstructive Apnea Index: obstructive apneas with no oxygen desaturation threshold used and with or without arousal / hour of sleep
Obstructive Apnea Index: obstructive apneas with no oxygen desaturation threshold used and with or without arousal / hour of sleep

Calculated

Polysomnography (PSG)
slppctn1
Percent of sleep time in stage 1 sleep
Percent of sleep time in stage 1 sleep Polysomnography (PSG)
slppctn2
Percent of sleep time in stage 2 sleep
Percent of sleep time in stage 2 sleep Polysomnography (PSG)
slppctn34
Percent of sleep time in stage 3-4 sleep
Percent of sleep time in stage 3-4 sleep Polysomnography (PSG)
slppcto2lt75
Percent of sleep time with oxygen saturation < 75%
Percent of sleep time with oxygen saturation < 75% Polysomnography (PSG)
slppcto2lt80
Percent of sleep time with oxygen saturation < 80%
Percent of sleep time with oxygen saturation < 80% Polysomnography (PSG)
slppcto2lt85
Percent of sleep time with oxygen saturation < 85%
Percent of sleep time with oxygen saturation < 85% Polysomnography (PSG)
slppctrem
Percent of sleep time in REM sleep
Percent of sleep time in REM sleep Polysomnography (PSG)
slptimen1
Time in stage 1 sleep
Time in stage 1 sleep Polysomnography (PSG)
slptimen2
Time in stage 2 sleep
Time in stage 2 sleep Polysomnography (PSG)
slptimen34
Time in stage 3-4 sleep
Time in stage 3-4 sleep Polysomnography (PSG)
slptimerem
Time in REM sleep
Time in REM sleep Polysomnography (PSG)
ess_1sitread
Epworth Sleepiness Scale: Chance of dozing while sitting and reading
Epworth Sleepiness Scale: Chance of dozing while sitting and reading

Item from the Epworth Sleepiness Scale Johns MW 1991 (PubMed ID: 1798888) All ESS variables from this study

Questionnaires/Epworth Sleepiness Scale (ESS)
ess_2watchingtv
Epworth Sleepiness Scale: Chance of dozing while watching TV
Epworth Sleepiness Scale: Chance of dozing while watching TV

Item from the Epworth Sleepiness Scale Johns MW 1991 (PubMed ID: 1798888) All ESS variables from this study

Questionnaires/Epworth Sleepiness Scale (ESS)
ess_3sitinactive
Epworth Sleepiness Scale: Chance of dozing while sitting, inactive in a public place
Epworth Sleepiness Scale: Chance of dozing while sitting, inactive in a public place

Item from the Epworth Sleepiness Scale Johns MW 1991 (PubMed ID: 1798888) All ESS variables from this study

Questionnaires/Epworth Sleepiness Scale (ESS)
ess_4passenger
Epworth Sleepiness Scale: Chance of dozing as a passenger in a car for an hour without a break
Epworth Sleepiness Scale: Chance of dozing as a passenger in a car for an hour without a break

Item from the Epworth Sleepiness Scale Johns MW 1991 (PubMed ID: 1798888) All ESS variables from this study

Questionnaires/Epworth Sleepiness Scale (ESS)
ess_5lyingdown
Epworth Sleepiness Scale: Chance of dozing while lying down in the afternoon when circumstances permit
Epworth Sleepiness Scale: Chance of dozing while lying down in the afternoon when circumstances permit

Item from the Epworth Sleepiness Scale Johns MW 1991 (PubMed ID: 1798888) All ESS variables from this study

Questionnaires/Epworth Sleepiness Scale (ESS)
ess_6sittalk
Epworth Sleepiness Scale: Chance of dozing while sitting and talking to someone
Epworth Sleepiness Scale: Chance of dozing while sitting and talking to someone

Item from the Epworth Sleepiness Scale Johns MW 1991 (PubMed ID: 1798888) All ESS variables from this study

Questionnaires/Epworth Sleepiness Scale (ESS)
ess_7afterlunch
Epworth Sleepiness Scale: Chance of dozing while sitting quietly after lunch without alcohol
Epworth Sleepiness Scale: Chance of dozing while sitting quietly after lunch without alcohol

Item from the Epworth Sleepiness Scale Johns MW 1991 (PubMed ID: 1798888) All ESS variables from this study

Questionnaires/Epworth Sleepiness Scale (ESS)
ess_8stoppedcar
Epworth Sleepiness Scale: Chance of dozing while in a car, while stopped for a few minutes in traffic
Epworth Sleepiness Scale: Chance of dozing while in a car, while stopped for a few minutes in traffic

Item from the Epworth Sleepiness Scale Johns MW 1991 (PubMed ID: 1798888) All ESS variables from this study

Questionnaires/Epworth Sleepiness Scale (ESS)