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Childhood Adenotonsillectomy Trial

Name Label Folder
omahi3
Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) (obstructive apneas all desaturations, mixed apneas all desaturations, plus hypopneas with >=3% or arousal) no centrals
Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) (obstructive apneas all desaturations, mixed apneas all desaturations, plus hypopneas with >=3% or arousal) no centrals

{[(total number of obstructive apneas) + (total number of mixed apneas) + (total number of hypopneas associated with >= 3% desaturation or arousal)] / (hours of sleep)}. will be missing if Total Sleep Time (TST) is 0.

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
omahi3b
Supine Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) (obstructive apneas all desaturations, mixed apneas all desaturations, plus hypopneas with >=3% or arousal)
Supine Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) (obstructive apneas all desaturations, mixed apneas all desaturations, plus hypopneas with >=3% or arousal)

{[(total number of obstructive apneas) + (total number of mixed apneas) + (total number of hypopneas associated with >= 3% desaturation or arousal)] / (hours of sleep)}. will be missing if Total Sleep Time (TST) is 0.

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
omahi3_change
Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) change between Baseline and End
Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) change between Baseline and End Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
omahi3nr
Non-rapid eye movement sleep (NREM) Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) (obstructive apneas all desaturations, mixed apneas all desaturations, plus hypopneas with >=3% or arousal)
Non-rapid eye movement sleep (NREM) Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) (obstructive apneas all desaturations, mixed apneas all desaturations, plus hypopneas with >=3% or arousal)

{[(total number of obstructive apneas) + (total number of mixed apneas) + (total number of hypopneas associated with >= 3% desaturation or arousal)] / (hours of sleep)}. will be missing if Total Sleep Time (TST) is 0.

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
omahi3o
Non-supine Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) (obstructive apneas all desaturations, mixed apneas all desaturations, plus hypopneas with >=3% or arousal)
Non-supine Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) (obstructive apneas all desaturations, mixed apneas all desaturations, plus hypopneas with >=3% or arousal)

{[(total number of obstructive apneas) + (total number of mixed apneas) + (total number of hypopneas associated with >= 3% desaturation or arousal)] / (hours of sleep)}. will be missing if Total Sleep Time (TST) is 0.

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
omahi3r
Rapid eye movement sleep (REM) Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) (obstructive apneas all desaturations, mixed apneas all desaturations, plus hypopneas with >=3% or arousal)
Rapid eye movement sleep (REM) Childhood Adenotonsillectomy Trial (CHAT) Apnea-Hypopnea Index (AHI) (obstructive apneas all desaturations, mixed apneas all desaturations, plus hypopneas with >=3% or arousal)

{[(total number of obstructive apneas) + (total number of mixed apneas) + (total number of hypopneas associated with >= 3% desaturation or arousal)] / (hours of sleep)}. will be missing if Total Sleep Time (TST) is 0.

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
omai0p
Childhood Adenotonsillectomy Trial (CHAT) OMAI (obstructive/mixed apnea index all desaturations) no centrals
Childhood Adenotonsillectomy Trial (CHAT) OMAI (obstructive/mixed apnea index all desaturations) no centrals Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
pcstah3d
Percentage of sleep time in apnea+hypopnea with >=3% desaturation
Percentage of sleep time in apnea+hypopnea with >=3% desaturation Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
pcstahar
Percentage of sleep time in apnea+hypopnea with arousal
Percentage of sleep time in apnea+hypopnea with arousal Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
pcstahda
Percentage of sleep time in apnea+hypopnea with >=3% desaturation or arousal
Percentage of sleep time in apnea+hypopnea with >=3% desaturation or arousal Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
rdim3p
Overall Respiratory Disturbance Index (RDI) at >=3% desaturation
Overall Respiratory Disturbance Index (RDI) at >=3% desaturation

[(total number of apneas and hypopneas associated with >= 3% desaturation) / (hours of sleep)]

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
rdim3pa
Overall Respiratory Disturbance Index (RDI) at >=3% desaturation or arousal
Overall Respiratory Disturbance Index (RDI) at >=3% desaturation or arousal

[(total number of apneas and hypopneas with >= 3% desaturation or arousal) / (hours of sleep)]

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
rdim3pns
Overall non-supine Respiratory Disturbance Index (RDI) at >=3% desaturation
Overall non-supine Respiratory Disturbance Index (RDI) at >=3% desaturation

[(total number of apneas and hypopneas in non-supine body position associated with >= 3% desaturation) / (hours of sleep)]. will be missing if no time non-supine or low position sensor quality.

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
rdim3ps
Overall supine Respiratory Disturbance Index (RDI) at >=3% desaturation
Overall supine Respiratory Disturbance Index (RDI) at >=3% desaturation

[(total number of apneas and hypopneas in supine body position associated with >= 3% desaturation) / (hours of sleep)]. will be missing if no time supine or low position sensor quality.

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
rdim4p
Overall Respiratory Disturbance Index (RDI) at >=4% desaturation
Overall Respiratory Disturbance Index (RDI) at >=4% desaturation

[(total number of apneas and hypopneas associated with >= 4% desaturation) / (hours of sleep)]

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
rdim4pa
Overall Respiratory Disturbance Index (RDI) at >=4% desaturation or arousal
Overall Respiratory Disturbance Index (RDI) at >=4% desaturation or arousal

[(total number of apneas and hypopneas with >= 4% desaturation or arousal) / (hours of sleep)]

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
capdur
Hours of usable cap
Hours of usable cap

Hours of usable cap signal - requires use of calibrated channel type with upper and lower limits for valid signal

Sleep/Polysomnography (PSG)/Signal Quality
overall
Overall study grade
Overall study grade Sleep/Polysomnography (PSG)/Signal Quality
oximdur
Hours of usable oximetry
Hours of usable oximetry Sleep/Polysomnography (PSG)/Signal Quality
qucap
Quality of cap
Quality of cap

usable mainly artifact free signal

Sleep/Polysomnography (PSG)/Signal Quality
quco2
Quality of carbon dioxide (CO2)
Quality of carbon dioxide (CO2) Sleep/Polysomnography (PSG)/Signal Quality
quoxim
Quality of oximetry
Quality of oximetry Sleep/Polysomnography (PSG)/Signal Quality
nremepbp
Sleep time (Non-rapid eye movement sleep (NREM), Supine)
Sleep time (Non-rapid eye movement sleep (NREM), Supine) Sleep/Polysomnography (PSG)/Sleep Architecture
nremepop
Sleep time (Non-rapid eye movement sleep (NREM), Non-supine)
Sleep time (Non-rapid eye movement sleep (NREM), Non-supine) Sleep/Polysomnography (PSG)/Sleep Architecture
nsupinep
Percentage time non-supine
Percentage time non-supine

[100*(number of minutes of sleep in non-supine body position) / (Total Sleep Time (TST))]

Sleep/Polysomnography (PSG)/Sleep Architecture
remepbp
Sleep time (Rapid eye movement sleep (REM), Supine)
Sleep time (Rapid eye movement sleep (REM), Supine)

Total time in rapid eye movement sleep (REM) with supine body position

Sleep/Polysomnography (PSG)/Sleep Architecture
remepop
Sleep Time (Rapid eye movement sleep (REM), Non-supine)
Sleep Time (Rapid eye movement sleep (REM), Non-supine)

Total time in rapid eye movement sleep (REM) with non-supine body position

Sleep/Polysomnography (PSG)/Sleep Architecture
rem_lat1
Rapid eye movement sleep (REM) latency I in minutes slp onset to first rapid eye movement sleep (REM)
Rapid eye movement sleep (REM) latency I in minutes slp onset to first rapid eye movement sleep (REM)

Total time from beginning of sleep to first epoch of rapid eye movement sleep (REM)

Sleep/Polysomnography (PSG)/Sleep Architecture
slp_eff
Sleep efficiency percentage
Sleep efficiency percentage

Percentage of time in bed that was spent sleeping [100*(Total Sleep Time (TST)) / (total time in bed)]

Sleep/Polysomnography (PSG)/Sleep Architecture
slplatp
Sleep latency
Sleep latency

Time from lights out time to beginning of sleep

Sleep/Polysomnography (PSG)/Sleep Architecture
supinep
Percentage of time supine
Percentage of time supine

Percent of sleep time in supine body position [100*(number of minutes of sleep in supine body position) / (Total Sleep Time (TST))]

Sleep/Polysomnography (PSG)/Sleep Architecture
timebedp
Time in bed
Time in bed

Time from lights out to lights on

Sleep/Polysomnography (PSG)/Sleep Architecture
timerem
Time rapid eye movement sleep (REM)
Time rapid eye movement sleep (REM)

Total time scored as rapid eye movement sleep (REM)

Sleep/Polysomnography (PSG)/Sleep Architecture
timeremp
Percentage time rapid eye movement sleep (REM)
Percentage time rapid eye movement sleep (REM)

Percent of sleep time in rapid eye movement sleep (REM) [100*(number of minutes scored as rapid eye movement sleep (REM)) / (Total Sleep Time (TST))] * 100

Sleep/Polysomnography (PSG)/Sleep Architecture
times34p
Percentage time stage 3-4
Percentage time stage 3-4

Percent of sleep time in stage 3-4 [100*(number of minutes scored as stage 3-4) / (Total Sleep Time (TST))]

Sleep/Polysomnography (PSG)/Sleep Architecture
timest1
Time stage 1
Time stage 1

Total time scored as stage 1 rounded to nearest minute

Sleep/Polysomnography (PSG)/Sleep Architecture
timest1p
Percentage of time stage 1
Percentage of time stage 1

Percent of sleep time in stage 1 [100*(number of minutes scored as stage 1) / (Total Sleep Time (TST))]

Sleep/Polysomnography (PSG)/Sleep Architecture
timest2
Time stage 2
Time stage 2

Total time scored as stage 2 rounded to nearest minute

Sleep/Polysomnography (PSG)/Sleep Architecture
timest2p
Percentage of time stage 2
Percentage of time stage 2

Percent of sleep time in stage 2 [100*(number of minutes scored as stage 2) / (Total Sleep Time (TST))]

Sleep/Polysomnography (PSG)/Sleep Architecture
timest34
Time stage 3-4
Time stage 3-4

Total time scored as stage 3/4 rounded to nearest minute

Sleep/Polysomnography (PSG)/Sleep Architecture
waso
Wake after sleep onset
Wake after sleep onset

Total amount of time spent awake after going to sleep [(time in bed) - (sleep latency) - (Total Sleep Time (TST))]

Sleep/Polysomnography (PSG)/Sleep Architecture
noplm
Number of Periodic limb movement (PLM) during sleep
Number of Periodic limb movement (PLM) during sleep Sleep/Polysomnography (PSG)/Sleep Events
avgrplm
Number of Periodic limb movement (PLM) per hour of rapid eye movement sleep (REM)
Number of Periodic limb movement (PLM) per hour of rapid eye movement sleep (REM) Sleep/Polysomnography (PSG)/Sleep Events/Limb Movements
lmar
Number of limb movements with arousal and respiratory event
Number of limb movements with arousal and respiratory event

Total

Sleep/Polysomnography (PSG)/Sleep Events/Limb Movements
plmaslp
Number of Periodic limb movements (PLMs) with arousal (sleep)
Number of Periodic limb movements (PLMs) with arousal (sleep)

Total

Sleep/Polysomnography (PSG)/Sleep Events/Limb Movements
posn
Position sensor working
Position sensor working Sleep/Polysomnography (PSG)/Sleep Events/Limb Movements
sls1
Chance of Dozing or Falling Asleep: Sitting and reading
Chance of Dozing or Falling Asleep: Sitting and reading Sleep/Modified Epworth Sleepiness Scale (ESS)
sls10
Chance of Dozing or Falling Asleep: Playing a video game
Chance of Dozing or Falling Asleep: Playing a video game Sleep/Modified Epworth Sleepiness Scale (ESS)
sls2
Chance of Dozing or Falling Asleep: Watching TV
Chance of Dozing or Falling Asleep: Watching TV Sleep/Modified Epworth Sleepiness Scale (ESS)
sls3
Chance of Dozing or Falling Asleep: Sitting inactive in a public place (e.g. a classroom or a movie theater)
Chance of Dozing or Falling Asleep: Sitting inactive in a public place (e.g. a classroom or a movie theater) Sleep/Modified Epworth Sleepiness Scale (ESS)
sls4
Chance of Dozing or Falling Asleep: As a passenger in a car for an hour without a break
Chance of Dozing or Falling Asleep: As a passenger in a car for an hour without a break Sleep/Modified Epworth Sleepiness Scale (ESS)
sls5
Chance of Dozing or Falling Asleep: Lying down to rest in the afternoon when circumstances permit
Chance of Dozing or Falling Asleep: Lying down to rest in the afternoon when circumstances permit Sleep/Modified Epworth Sleepiness Scale (ESS)
sls6
Chance of Dozing or Falling Asleep: Sitting and talking to someone
Chance of Dozing or Falling Asleep: Sitting and talking to someone Sleep/Modified Epworth Sleepiness Scale (ESS)
sls7
Chance of Dozing or Falling Asleep: Sitting quietly after lunch
Chance of Dozing or Falling Asleep: Sitting quietly after lunch Sleep/Modified Epworth Sleepiness Scale (ESS)
sls8
Chance of Dozing or Falling Asleep: In a car, while stopped for a few minutes in traffic
Chance of Dozing or Falling Asleep: In a car, while stopped for a few minutes in traffic Sleep/Modified Epworth Sleepiness Scale (ESS)
sls9
Chance of Dozing or Falling Asleep: Doing homework or taking a test
Chance of Dozing or Falling Asleep: Doing homework or taking a test Sleep/Modified Epworth Sleepiness Scale (ESS)
compq1
Mean response of Q1 (PSQ)
Mean response of Q1 (PSQ) Sleep/Pediatric Sleep Questionnaire
compq12
Mean response of Q1 & Q2(PSQ)
Mean response of Q1 & Q2(PSQ) Sleep/Pediatric Sleep Questionnaire
nq1
PSQ total number of questions missing algorithm: nQ1=5-nmiss(of psl1a, psl1b, psl1c, psl1d, psl1e)
PSQ total number of questions missing algorithm: nQ1=5-nmiss(of psl1a, psl1b, psl1c, psl1d, psl1e) Sleep/Pediatric Sleep Questionnaire
nq12
PSQ total number of questions missing algorighm: nQ12=6-nmiss(of psl1a, psl1b, psl1c, psl1d, psl1e,psl2)
PSQ total number of questions missing algorighm: nQ12=6-nmiss(of psl1a, psl1b, psl1c, psl1d, psl1e,psl2) Sleep/Pediatric Sleep Questionnaire
psl10a
Does not seem to listen when spoken to directly.
Does not seem to listen when spoken to directly. Sleep/Pediatric Sleep Questionnaire
psl10b
Has difficulty organizing tasks and activities.
Has difficulty organizing tasks and activities. Sleep/Pediatric Sleep Questionnaire
psl10c
Is easily distracted by extraneous stimuli.
Is easily distracted by extraneous stimuli. Sleep/Pediatric Sleep Questionnaire
psl10d
Fidgets with hands or feet or squirms in seat.
Fidgets with hands or feet or squirms in seat. Sleep/Pediatric Sleep Questionnaire
psl10e
Is on the go or often acts as if driven by a motor
Is on the go or often acts as if driven by a motor Sleep/Pediatric Sleep Questionnaire
psl10f
Interrupts or intrudes on others
Interrupts or intrudes on others Sleep/Pediatric Sleep Questionnaire
psl1a
Snores more than half the time?
Snores more than half the time? Sleep/Pediatric Sleep Questionnaire
psl1b
Always snores?
Always snores? Sleep/Pediatric Sleep Questionnaire
psl1c
Snores loudly?
Snores loudly? Sleep/Pediatric Sleep Questionnaire
psl1d
Have heavy or loud breathing?
Have heavy or loud breathing? Sleep/Pediatric Sleep Questionnaire
psl1e
Have trouble breathing, or struggle to breathe?
Have trouble breathing, or struggle to breathe? Sleep/Pediatric Sleep Questionnaire
psl2
Have you ever seen your child stop breathing during the night?
Have you ever seen your child stop breathing during the night? Sleep/Pediatric Sleep Questionnaire
psl3a
Tend to breathe through the mouth during the day?
Tend to breathe through the mouth during the day? Sleep/Pediatric Sleep Questionnaire
psl3b
Have a dry mouth upon waking up in the morning?
Have a dry mouth upon waking up in the morning? Sleep/Pediatric Sleep Questionnaire
psl3c
Occasionally wet the bed?
Occasionally wet the bed? Sleep/Pediatric Sleep Questionnaire
psl4a
Wake up feeling unrefreshed in the morning?
Wake up feeling unrefreshed in the morning? Sleep/Pediatric Sleep Questionnaire
psl4b
Have a problem with sleepiness during the day?
Have a problem with sleepiness during the day? Sleep/Pediatric Sleep Questionnaire
psl5
Has a teacher commented that child appears sleepy during the day?
Has a teacher commented that child appears sleepy during the day? Sleep/Pediatric Sleep Questionnaire
psl6
Is it hard to wake your child up in the morning?
Is it hard to wake your child up in the morning? Sleep/Pediatric Sleep Questionnaire
psl7
Does your child wake up with headaches in the morning?
Does your child wake up with headaches in the morning? Sleep/Pediatric Sleep Questionnaire
psl8
Did your child stop growing at a normal rate at any time since birth?
Did your child stop growing at a normal rate at any time since birth? Sleep/Pediatric Sleep Questionnaire
psl9
Is your child overweight?
Is your child overweight? Sleep/Pediatric Sleep Questionnaire
totalpsq
Total PSQ score
Total PSQ score Sleep/Pediatric Sleep Questionnaire
haspaperwork
Paperwork received at reading center
Paperwork received at reading center Sleep/Polysomnography (PSG)/Administrative
hipriscore
Flagged for priority scoring
Flagged for priority scoring Sleep/Polysomnography (PSG)/Administrative
losoth
Data lost - other
Data lost - other

1=data lost - other

Sleep/Polysomnography (PSG)/Administrative
maxresou30
Maximum length respiratory event >30 seconds verified
Maximum length respiratory event >30 seconds verified

1=Outlier - max length respiratory event > 30 seconds verified

Sleep/Polysomnography (PSG)/Administrative
month
Calendar month of Polysomnography (PSG)
Calendar month of Polysomnography (PSG) Sleep/Polysomnography (PSG)/Administrative
npflow
Flow limitation
Flow limitation

1=flow limitation observed

Sleep/Polysomnography (PSG)/Administrative
processdt
Date data were processed
Date data were processed Sleep/Polysomnography (PSG)/Administrative
rcvddt
Date received at reading center
Date received at reading center Sleep/Polysomnography (PSG)/Administrative
reviewdt
Date of preliminary review
Date of preliminary review Sleep/Polysomnography (PSG)/Administrative
rsnco
Reason for study failure
Reason for study failure Sleep/Polysomnography (PSG)/Administrative
scordt
Date scored
Date scored

Date scoring performed at reading center

Sleep/Polysomnography (PSG)/Administrative
scoredt
Scored date
Scored date

Date scored (date of birth in compumedics screen) if study reprocessed date scored changes

Sleep/Polysomnography (PSG)/Administrative
scoreridr
Recoded Scorer ID
Recoded Scorer ID Sleep/Polysomnography (PSG)/Administrative
scorid
Scorer ID
Scorer ID

ID of reading center staff who performed scoring

Sleep/Polysomnography (PSG)/Administrative
season
Season for Polysomnography (PSG): Aug-Nov vs. All the other
Season for Polysomnography (PSG): Aug-Nov vs. All the other Sleep/Polysomnography (PSG)/Administrative
slpprdm
Sleep period
Sleep period

Total sleep period (minutes) = Total Sleep Time (TST) + total time awake, includes time spent awake after lights on and therefore is not correct (not used in final dataset)

Sleep/Polysomnography (PSG)/Administrative
staendt
Week ending date
Week ending date Sleep/Polysomnography (PSG)/Administrative