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Childhood Adenotonsillectomy Trial

Name Label Folder
ahi3
Apnea / Hypopnea events with >= 3% percent desaturation per hour of sleep
Apnea / Hypopnea events with >= 3% percent desaturation per hour of sleep Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
ahi_a0h3
Apnea-Hypopnea Index (AHI) >= 3% - number of [all apneas] and [hypopneas with >=3% oxygen desaturation] per hour of sleep
Apnea-Hypopnea Index (AHI) >= 3% - number of [all apneas] and [hypopneas with >=3% oxygen desaturation] per hour of sleep Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
ahi_a0h3a
Apnea-Hypopnea Index (AHI) >= 3% - number of [all apneas] and [hypopneas with >=3% oxygen desaturation or arousal] per hour of sleep
Apnea-Hypopnea Index (AHI) >= 3% - number of [all apneas] and [hypopneas with >=3% oxygen desaturation or arousal] per hour of sleep Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
ahi_a0h4
Apnea-Hypopnea Index (AHI) >= 4% - number of [all apneas] and [hypopneas with >=4% oxygen desaturation] per hour of sleep
Apnea-Hypopnea Index (AHI) >= 4% - number of [all apneas] and [hypopneas with >=4% oxygen desaturation] per hour of sleep Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
ahi_a0h4a
Apnea-Hypopnea Index (AHI) >= 4% - number of [all apneas] and [hypopneas with >=4% oxygen desaturation or arousal] per hour of sleep
Apnea-Hypopnea Index (AHI) >= 4% - number of [all apneas] and [hypopneas with >=4% oxygen desaturation or arousal] per hour of sleep Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
ahi_c0h3
Central Apnea-Hypopnea Index (AHI) >= 3% - number of [central apneas] and [hypopneas with >=3% oxygen desaturation] per hour of sleep
Central Apnea-Hypopnea Index (AHI) >= 3% - number of [central apneas] and [hypopneas with >=3% oxygen desaturation] per hour of sleep Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
ahi_c0h3a
Central Apnea-Hypopnea Index (AHI) >= 3% - number of [central apneas] and [hypopneas with >=3% oxygen desaturation or arousal] per hour of sleep
Central Apnea-Hypopnea Index (AHI) >= 3% - number of [central apneas] and [hypopneas with >=3% oxygen desaturation or arousal] per hour of sleep Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
ahi_c0h4
Central Apnea-Hypopnea Index (AHI) >= 4% - number of [central apneas] and [hypopneas with >=4% oxygen desaturation] per hour of sleep
Central Apnea-Hypopnea Index (AHI) >= 4% - number of [central apneas] and [hypopneas with >=4% oxygen desaturation] per hour of sleep Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
ahi_c0h4a
Central Apnea-Hypopnea Index (AHI) >= 4% - number of [central apneas] and [hypopneas with >=4% oxygen desaturation or arousal] per hour of sleep
Central Apnea-Hypopnea Index (AHI) >= 4% - number of [central apneas] and [hypopneas with >=4% oxygen desaturation or arousal] per hour of sleep Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
ahilt2
Obstructive Apnea Index (OAI) < 1 and Apnea-Hypopnea Index (AHI) < 2 (normal range) = 1 Ineligible Normal
Obstructive Apnea Index (OAI) < 1 and Apnea-Hypopnea Index (AHI) < 2 (normal range) = 1 Ineligible Normal Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
ahi_o0h3
Obstructive Apnea-Hypopnea Index (AHI) >= 3% - number of [obstructive apneas] and [hypopneas with >=3% oxygen desaturation] per hour of sleep
Obstructive Apnea-Hypopnea Index (AHI) >= 3% - number of [obstructive apneas] and [hypopneas with >=3% oxygen desaturation] per hour of sleep Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
ahi_o0h3a
Obstructive Apnea-Hypopnea Index (AHI) >= 3% - number of [obstructive apneas] and [hypopneas with >=3% oxygen desaturation or arousal] per hour of sleep
Obstructive Apnea-Hypopnea Index (AHI) >= 3% - number of [obstructive apneas] and [hypopneas with >=3% oxygen desaturation or arousal] per hour of sleep Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
ahi_o0h4
Obstructive Apnea-Hypopnea Index (AHI) >= 4% - number of [obstructive apneas] and [hypopneas with >=4% oxygen desaturation] per hour of sleep
Obstructive Apnea-Hypopnea Index (AHI) >= 4% - number of [obstructive apneas] and [hypopneas with >=4% oxygen desaturation] per hour of sleep Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
ahi_o0h4a
Obstructive Apnea-Hypopnea Index (AHI) >= 4% - number of [obstructive apneas] and [hypopneas with >=4% oxygen desaturation or arousal] per hour of sleep
Obstructive Apnea-Hypopnea Index (AHI) >= 4% - number of [obstructive apneas] and [hypopneas with >=4% oxygen desaturation or arousal] per hour of sleep Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
ahiu3
Respiratory Disturbance Index (RDI)-Apnea/Hypopnea/AASM Hypopneas (Unsure Compumedics label) with >= 3% desaturation
Respiratory Disturbance Index (RDI)-Apnea/Hypopnea/AASM Hypopneas (Unsure Compumedics label) with >= 3% desaturation Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
cai
Central apnea index
Central apnea index

(Total number of central apneas) / (hours of sleep)

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
cai0p
Central apnea index all desaturations
Central apnea index all desaturations

[(Total number of central apneas associated with all desaturations) / (hours of sleep)]. Will be missing if Total Sleep Time (TST) is 0.

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
cent_obs_ratio
Central/Obstructive Apnea ratio at all desaturations
Central/Obstructive Apnea ratio at all desaturations Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
cent_obs_ratioa
Central/Obstructive Apnea ratio at all desaturations or with arousal
Central/Obstructive Apnea ratio at all desaturations or with arousal Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
oai
Obstructive apnea index
Obstructive apnea index

(Total number of obstructive apneas) / (hours of sleep)

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
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
ahiov20
Obstructive Apnea Index (OAI) > 15 or Apnea-Hypopnea Index (AHI) > 20 = 1 Surgeon Alert
Obstructive Apnea Index (OAI) > 15 or Apnea-Hypopnea Index (AHI) > 20 = 1 Surgeon Alert Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
ahiov30
Urgent Referral - Obstructive Apnea Index (OAI) > 20 or Apnea-Hypopnea Index (AHI) > 30 = 1 Urgent Ineligible
Urgent Referral - Obstructive Apnea Index (OAI) > 20 or Apnea-Hypopnea Index (AHI) > 30 = 1 Urgent Ineligible Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
ahntdur
Total apnea and hypopnea length (Non-rapid eye movement sleep (NREM))
Total apnea and hypopnea length (Non-rapid eye movement sleep (NREM))

duration

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
ahntdurbp
Total apnea and hypopnea Length (Non-rapid eye movement sleep (NREM), Supine)
Total apnea and hypopnea Length (Non-rapid eye movement sleep (NREM), Supine)

duration

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
ahntdurop
Total apnea and hypopnea length (Non-rapid eye movement sleep (NREM), Non-supine)
Total apnea and hypopnea length (Non-rapid eye movement sleep (NREM), Non-supine)

duration

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
ahrtdurbp
Total apnea and hypopnea length (Rapid eye movement sleep (REM), Supine)
Total apnea and hypopnea length (Rapid eye movement sleep (REM), Supine)

duration

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
ahtdurop
Total apnea and hypopnea length (Rapid eye movement sleep (REM), Non-supine)
Total apnea and hypopnea length (Rapid eye movement sleep (REM), Non-supine)

duration

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
apnhyppr
Scoring Apnea/Hypopnea unreliable
Scoring Apnea/Hypopnea unreliable

1=Apnea/Hypopnea distinction unreliable (when airflow signal is artifactual or absent for over 20 % of scored respiratory events)

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
cai4p
Central apnea index >=4% desaturations
Central apnea index >=4% desaturations

[(Total number of central apneas associated with >= 4% desaturations) / (hours of sleep)]

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
cai4pa
Central apnea index >=4% or arousal
Central apnea index >=4% or arousal

[(Total number of central apneas with >= 4% desaturation or arousal) / (hours of sleep)]

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
hi
Hypopnea Index >= 3% desaturation or arousal
Hypopnea Index >= 3% desaturation or arousal Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
hrtdur
Total apnea and hypopnea length (Rapid eye movement sleep (REM))
Total apnea and hypopnea length (Rapid eye movement sleep (REM))

duration

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
lgahi
LOG Obstructive Apnea-Hypopnea Index (AHI)
LOG Obstructive Apnea-Hypopnea Index (AHI)

Original source: MS 003

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
lgahi_0
LOG Obstructive Apnea-Hypopnea Index (AHI) (0 replaced with 0.0001)
LOG Obstructive Apnea-Hypopnea Index (AHI) (0 replaced with 0.0001)

Original source: MS 003

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
lghi
LOG Hypopnea Index with Arousal
LOG Hypopnea Index with Arousal

Original source: MS 003

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
lghi_0
LOG Hypopnea Index with Arousal (0 replaced with 0.0001)
LOG Hypopnea Index with Arousal (0 replaced with 0.0001)

Original source: MS 003

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
lgoai
LOG Obstructive Apnea Index
LOG Obstructive Apnea Index

Original source: MS 003

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
lgoai_0
LOG Obstructive Apnea Index (0 replaced with 0.0001)
LOG Obstructive Apnea Index (0 replaced with 0.0001)

Original source: MS 003

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
normalized1
Apnea-Hypopnea Index (AHI) normalized (improved) between baseline and follow-up
Apnea-Hypopnea Index (AHI) normalized (improved) between baseline and follow-up

Indicates an OMAHI3 <= 2 and OAI0P <= 1 at follow-up, whereas one or both of these thresholds were exceeded at baseline.

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
oahi3
Obstructive apnea hypopnea (>=3% desaturation) index
Obstructive apnea hypopnea (>=3% desaturation) index

{[(total number of obstructive apneas) + (total number of hypopneas associated with >= 3% desaturation)] / (hours of sleep)}

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
oahi4
Obstructive apnea hypopnea (>=4% desaturation) index
Obstructive apnea hypopnea (>=4% desaturation) index

{[(total number of obstructive apneas) + (total number of hypopneas associated with >= 4% desaturation)] / (hours of sleep)}

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
oai0p
Obstructive apnea index (all obstructives with all desaturations)
Obstructive apnea index (all obstructives with all desaturations)

[(total number of obstructive apneas associated with all desaturations) / (hours of sleep)]. will be missing if Total Sleep Time (TST) is 0.

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
oai4p
Obstructive apnea index >=4% desaturations
Obstructive apnea index >=4% desaturations

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

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
oai4pa
Obstructive apnea index >=4% or arousal
Obstructive apnea index >=4% or arousal

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

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
omai4p
Obstructive/mixed apnea index >=4% desaturations
Obstructive/mixed apnea index >=4% desaturations

[(total number of obstructive apneas associated with >= 4% desaturation+ total number of mixed apneas associated with >= 4% desaturation) / (hours of sleep)]

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
omai4pa
Obstructive/mixed apnea index >=4% or arousal
Obstructive/mixed apnea index >=4% or arousal

[(total number of obstructive apneas with >= 4% desaturation or arousal + total number of mixed apneas with >= 4% desaturation or arousal) / (hours of sleep)]

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
qsahi
Apnea-Hypopnea Index (AHI)
Apnea-Hypopnea Index (AHI)

Recorded by the scorer on QS form

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
qsoai
Obstructive apnea index (OAI)
Obstructive apnea index (OAI)

Recorded by the scorer on QS form

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
rdim0p
Overall Respiratory Disturbance Index (RDI) at 0% desaturation
Overall Respiratory Disturbance Index (RDI) at 0% desaturation

[(total number of apneas and hypopneas) / (hours of sleep)]

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
rdim0pa
Overall Respiratory Disturbance Index (RDI) at 0% desaturation with arousal
Overall Respiratory Disturbance Index (RDI) at 0% desaturation with arousal

[(total number of apneas and hypopneas with arousal) / (hours of sleep)]

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
rdim0pns
Overall non-supine Respiratory Disturbance Index (RDI) at 0% desaturation
Overall non-supine Respiratory Disturbance Index (RDI) at 0% desaturation

Non-supine Respiratory Disturbance Index (RDI) at all desaturations [(total number of apneas and hypopneas in non-supine body position) / (hours of sleep)]

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
rdim0ps
Overall supine Respiratory Disturbance Index (RDI) at 0% desaturation
Overall supine Respiratory Disturbance Index (RDI) at 0% desaturation

Supine Respiratory Disturbance Index (RDI) at all desaturations [(total number of apneas and hypopneas in supine body position) / (hours of sleep)]

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
rdim2p
Overall Respiratory Disturbance Index (RDI) at >=2% desaturation
Overall Respiratory Disturbance Index (RDI) at >=2% desaturation

[(total number of apneas and hypopneas associated with >= 2% desaturation) / (hours of sleep)]

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
rdim2pa
Overall Respiratory Disturbance Index (RDI) at >=2% desaturation or arousal
Overall Respiratory Disturbance Index (RDI) at >=2% desaturation or arousal

Respiratory Disturbance Index (RDI) at >=2% desaturation or arousal [(total number of apneas and hypopneas with >=2% desaturation or arousal) / (hours of sleep)]

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
rdim2pns
Overall non-supine Respiratory Disturbance Index (RDI) at >=2% desaturation
Overall non-supine Respiratory Disturbance Index (RDI) at >=2% desaturation

[(total number of apneas and hypopneas in non-supine body position associated with >= 2% desaturation) / (hours of sleep)]

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
rdim2ps
Overall supine Respiratory Disturbance Index (RDI) at >=2% desaturation
Overall supine Respiratory Disturbance Index (RDI) at >=2% desaturation

[(total number of apneas and hypopneas in supine body position associated with >= 2% desaturation) / (hours of sleep)]

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
rdim4pns
Overall non-supine Respiratory Disturbance Index (RDI) at >=4% desaturation
Overall non-supine Respiratory Disturbance Index (RDI) at >=4% desaturation

[(total number of apneas and hypopneas in non-supine body position associated with >= 4% desaturation) / (hours of sleep)]

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
rdim4ps
Overall supine Respiratory Disturbance Index (RDI) at >=4% desaturation
Overall supine Respiratory Disturbance Index (RDI) at >=4% desaturation

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

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
rdim5p
Overall Respiratory Disturbance Index (RDI) at >=5% desaturation
Overall Respiratory Disturbance Index (RDI) at >=5% desaturation

[(total number of apneas and hypopneas associated with >= 5% desaturation) / (hours of sleep)]

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
rdim5pa
Overall Respiratory Disturbance Index (RDI) at >=5% desaturation or arousal
Overall Respiratory Disturbance Index (RDI) at >=5% desaturation or arousal

[(total number of apneas and hypopneas with >= 5% desaturation or arousal) / (hours of sleep)]

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
rdim5pns
Overall non-supine Respiratory Disturbance Index (RDI) at >=5% desaturation
Overall non-supine Respiratory Disturbance Index (RDI) at >=5% desaturation

[(total number of apneas and hypopneas in non-supine body position associated with >= 5% desaturation) / (hours of sleep)]

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
rdim5ps
Overall supine Respiratory Disturbance Index (RDI) at >=5% desaturation
Overall supine Respiratory Disturbance Index (RDI) at >=5% desaturation

Supine Respiratory Disturbance Index (RDI) at >=5% desaturation [(total number of apneas and hypopneas in supine body position associated with >=5% desaturation) / (hours of sleep)]

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
rdimnr0p
Overall non-rapid eye movement sleep (NREM) Respiratory Disturbance Index (RDI) at 0% desaturation
Overall non-rapid eye movement sleep (NREM) Respiratory Disturbance Index (RDI) at 0% desaturation

Non-rapid eye movement sleep (NREM) Respiratory Disturbance Index (RDI) at all desaturations [(total number of apneas and hypopneas in non-rapid eye movement sleep (NREM)) / (hours of non-rapid eye movement sleep (NREM))]

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
rdimnr2p
Overall non-rapid eye movement sleep (NREM) Respiratory Disturbance Index (RDI) at >=2% desaturation
Overall non-rapid eye movement sleep (NREM) Respiratory Disturbance Index (RDI) at >=2% desaturation

[(total number of apneas and hypopneas in non-rapid eye movement sleep (NREM) associated with >= 2% desaturation) / (hours of non-rapid eye movement sleep (NREM))]

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
rdimnr3p
Overall non-rapid eye movement sleep (NREM) Respiratory Disturbance Index (RDI) at >=3% desaturation
Overall non-rapid eye movement sleep (NREM) Respiratory Disturbance Index (RDI) at >=3% desaturation

[(total number of apneas and hypopneas in non-rapid eye movement sleep (NREM) associated with >= 3% desaturation) / (hours of non-rapid eye movement sleep (NREM))]

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
rdimnr4p
Overall non-rapid eye movement sleep (NREM) Respiratory Disturbance Index (RDI) at >=4% desaturation
Overall non-rapid eye movement sleep (NREM) Respiratory Disturbance Index (RDI) at >=4% desaturation

[(total number of apneas and hypopneas in non-rapid eye movement sleep associated with >= 4% desaturation) / (hours of non-rapid eye movement sleep (NREM))]

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
rdimnr5p
Overall non-rapid eye movement sleep (NREM) Respiratory Disturbance Index (RDI) at >=5% desaturation
Overall non-rapid eye movement sleep (NREM) Respiratory Disturbance Index (RDI) at >=5% desaturation

[(total number of apneas and hypopneas in non-rapid eye movement sleep (NREM) associated with >= 5% desaturation) / (hours of non-rapid eye movement sleep (NREM))]

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
rdimrem0p
Overall rapid eye movement sleep (REM) Respiratory Disturbance Index (RDI) at 0% desaturation
Overall rapid eye movement sleep (REM) Respiratory Disturbance Index (RDI) at 0% desaturation

[(total number of apneas and hypopneas in rapid eye movement sleep (REM)) / (hours of rapid eye movement sleep (REM))]

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
rdimrem2p
Overall rapid eye movement sleep (REM) Respiratory Disturbance Index (RDI) at >=2% desaturation
Overall rapid eye movement sleep (REM) Respiratory Disturbance Index (RDI) at >=2% desaturation

[(total number of apneas and hypopneas in rapid eye movement sleep (REM) associated with >= 2% desaturation) / (hours of rapid eye movement sleep (REM))]

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
rdimrem3p
Overall rapid eye movement sleep (REM) Respiratory Disturbance Index (RDI) at >=3% desaturation
Overall rapid eye movement sleep (REM) Respiratory Disturbance Index (RDI) at >=3% desaturation

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

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
rdimrem4p
Overall rapid eye movement sleep (REM) Respiratory Disturbance Index (RDI) at >=4% desaturation
Overall rapid eye movement sleep (REM) Respiratory Disturbance Index (RDI) at >=4% desaturation

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

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
rdimrem5p
Overall rapid eye movement sleep (REM) Respiratory Disturbance Index (RDI) at >=5% desaturation
Overall rapid eye movement sleep (REM) Respiratory Disturbance Index (RDI) at >=5% desaturation

[(total number of apneas and hypopneas in rapid eye movement sleep (REM) associated with >= 5% desaturation) / (hours of rapid eye movement sleep (REM))]

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes
respevpr
Scoring respiratory events (Respiratory Disturbance Index (RDI)) unreliable
Scoring respiratory events (Respiratory Disturbance Index (RDI)) unreliable

1=Problems with respiratory events (when due to the technical quality of the respiratory signals, distinctions between hypopneas and normal breaths are equivocal in over 20 % of scored events; also when the quality of the oximetry signal raises doubts about actual magnitude of desaturation linked with over 20 % of respiratory events (unstable baseline)

Sleep/Polysomnography (PSG)/Respiratory Events/Indexes