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Study of Osteoporotic Fractures

Name Label Folder
sofid
Study of Osteoporotic Fractures (SOF) Public Data Release ID
Study of Osteoporotic Fractures (SOF) Public Data Release ID

The identifier used to link SOF datasets and polysomnography files.

Administrative
gender
Gender
Gender Demographics
nsrr_bmi
Body mass index (BMI)
Body mass index (BMI)

Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: "v8bmi: at Visit 8

Harmonized/Anthropometry
nsrr_bp_diastolic
Diastolic blood pressure
Diastolic blood pressure

Resting diastolic blood pressure from the upper arm. Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: v8lbpdia at Visit 8

Harmonized/Clinical Data
nsrr_bp_systolic
Systolic blood pressure
Systolic blood pressure

Resting systolic blood pressure collected from the upper arm. Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: v8lbpsys at Visit 8

Harmonized/Clinical Data
nsrr_age
Subject age
Subject age

Participant ages greater than 89 have been recoded into 90 for de-identification purposes.

Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: v8age at Visit 8

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

All ages greater than 89 have been recoded to 90. Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: v8age at Visit 8

Harmonized/Demographics
nsrr_race
Subject race
Subject race

Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: race at Visit 8

Harmonized/Demographics
nsrr_sex
Subject sex
Subject sex

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

Harmonized/Demographics
nsrr_current_smoker
Currently smoking cigarettes
Currently smoking cigarettes

Indicates whether subject currently smokes cigarettes.

Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: v8smok at Visit 8

Harmonized/Lifestyle and Behavioral Health
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_a0h3a at Visit 8

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_a0h3 at Visit 8

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_a0h4a at Visit 8

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_a0h4 at Visit 8

Harmonized/Polysomnography/Apnea-Hypopnea Indices
nsrr_phrnumar_f1
Arousal Index: Number of arousals per hour of sleep from polysomnography
Arousal Index: Number of arousals per hour of sleep from polysomnography

Harmonized by the NSRR team. Source: ai_all at Visit 8

Harmonized/Polysomnography/Arousal
nsrr_flag_spsw
Study scored sleep/wake rather than with full sleep staging if there is not sufficient quality on EEG lead. Studies scored as sleep wake have all sleep stages scored using a default of Stage 2 and no arousals are scored.
Study scored sleep/wake rather than with full sleep staging if there is not sufficient quality on EEG lead. Studies scored as sleep wake have all sleep stages scored using a default of Stage 2 and no arousals are scored.

Harmonized by the NSRR team. Source: slewake at Visit 8

Harmonized/Polysomnography/Signal Quality
nsrr_pctdursp_s1
Percentage of total sleep duration (i.e., total sleep time, TST) in stage 1 (N1) from polysomnography
Percentage of total sleep duration (i.e., total sleep time, TST) in stage 1 (N1) from polysomnography

Harmonized by the NSRR team. Source: tmstg1p at Visit 8

Harmonized/Polysomnography/Sleep Architecture
nsrr_pctdursp_s2
Percentage of total sleep duration (i.e., total sleep time, TST) in stage 2 (N2) from polysomnography
Percentage of total sleep duration (i.e., total sleep time, TST) in stage 2 (N2) from polysomnography

Harmonized by the NSRR team. Source: tmstg2p at Visit 8

Harmonized/Polysomnography/Sleep Architecture
nsrr_pctdursp_s3
Percentage of total sleep duration (i.e., total sleep time, TST) in stage 3/4 (N3) from polysomnography
Percentage of total sleep duration (i.e., total sleep time, TST) in stage 3/4 (N3) from polysomnography

Harmonized by the NSRR team. Source: tmstg34p at Visit 8

Harmonized/Polysomnography/Sleep Architecture
nsrr_pctdursp_sr
Percentage of total sleep duration (i.e., total sleep time, TST) in REM from polysomnography
Percentage of total sleep duration (i.e., total sleep time, TST) in REM from polysomnography

Harmonized by the NSRR team. Source: tmremp at Visit 8

Harmonized/Polysomnography/Sleep Architecture
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: slpprdp at Visit 8

Harmonized/Polysomnography/Sleep Architecture
nsrr_ttldursp_s1s4
REM Sleep Latency: the interval between the first sleep epoch and REM sleep excluding wake
REM Sleep Latency: the interval between the first sleep epoch and REM sleep excluding wake

Harmonized by the NSRR team. Source: remlaiip at Visit 8

Harmonized/Polysomnography/Sleep Architecture
nsrr_ttleffsp_f1
Sleep Efficiency: the ratio of sleep duration (i.e., total sleep time, TST) to in-bed period frompolysomnography
Sleep Efficiency: the ratio of sleep duration (i.e., total sleep time, TST) to in-bed period frompolysomnography

Harmonized by the NSRR team. Source: slp_eff at Visit 8

Harmonized/Polysomnography/Sleep Architecture
nsrr_ttllatsp_f1
Sleep Latency: the interval between lights-out/in-bed time and sleep onset time from polysomnography
Sleep Latency: the interval between lights-out/in-bed time and sleep onset time from polysomnography

Harmonized by the NSRR team. Source: slplatp at Visit 8

Harmonized/Polysomnography/Sleep Architecture
nsrr_ttlprdbd_f1
Total period of bed (i.e., time in bed) from polysomnography
Total period of bed (i.e., time in bed) from polysomnography

Harmonized by the NSRR team. Source: timebedp at Visit 8

Harmonized/Polysomnography/Sleep Architecture
nsrr_ttlprdsp_s1sr
REM Sleep Latency: the interval between the first sleep epoch and REM sleep including wake
REM Sleep Latency: the interval between the first sleep epoch and REM sleep including wake

Harmonized by the NSRR team. Source: remlaip at Visit 8

Harmonized/Polysomnography/Sleep Architecture
ahi_a0h3
Apnea-Hypopnea Index: (Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 3% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography
Apnea-Hypopnea Index: (Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 3% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
ahi_a0h3a
Apnea-Hypopnea Index: (Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 3% oxygen desaturation or with arousal) / hour of sleep from type II polysomnography
Apnea-Hypopnea Index: (Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 3% oxygen desaturation or with arousal) / hour of sleep from type II 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/Apnea-Hypopnea Indices
ahi_a0h4
Apnea-Hypopnea Index: (Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography
Apnea-Hypopnea Index: (Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type II 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/Apnea-Hypopnea Indices
ahi_a0h4a
Apnea-Hypopnea Index: (Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 4% oxygen desaturation or with arousal) / hour of sleep from type II polysomnography
Apnea-Hypopnea Index: (Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 4% oxygen desaturation or with arousal) / hour of sleep from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
ahi_c0h3
Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 3% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography
Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 3% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
ahi_c0h3a
Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 3% oxygen desaturation or with arousal) / hour of sleep from type II polysomnography
Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 3% oxygen desaturation or with arousal) / hour of sleep from type II 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/Apnea-Hypopnea Indices
ahi_c0h4
Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography
Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type II 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/Apnea-Hypopnea Indices
ahi_c0h4a
Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 4% oxygen desaturation or with arousal) / hour of sleep from type II polysomnography
Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 4% oxygen desaturation or with arousal) / hour of sleep from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
ahi_o0h3
Obstructive Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 3% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography
Obstructive Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 3% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
ahi_o0h3a
Obstructive Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 3% oxygen desaturation or with arousal) / hour of sleep from type II polysomnography
Obstructive Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 3% oxygen desaturation or with arousal) / hour of sleep from type II 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/Apnea-Hypopnea Indices
ahi_o0h4
Obstructive Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type II polysomnography
Obstructive Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type II 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/Apnea-Hypopnea Indices
ahi_o0h4a
Obstructive Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 4% oxygen desaturation or with arousal) / hour of sleep from type II polysomnography
Obstructive Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and >= 4% oxygen desaturation or with arousal) / hour of sleep from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events.

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
cai0p
Central Apnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal) / hour of sleep from type II polysomnography
Central Apnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal) / hour of sleep from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
oai0p
Obstructive Apnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal) / hour of sleep from type II polysomnography
Obstructive Apnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal) / hour of sleep from type II polysomnography Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
rdi0p
Apnea-Hypopnea Index: Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and with no oxygen desaturation used and with or without arousal / hour of sleep from type II polysomnography
Apnea-Hypopnea Index: Apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and with no oxygen desaturation used and with or without arousal / hour of sleep from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
rdi3p
Apnea-Hypopnea Index: Apneas with >=3% oxygen desaturation and with or without arousal+ hypopneas with > 30% flow reduction and >=3% oxygen desaturation and with or without arousal / hour of sleep from type II polysomnography
Apnea-Hypopnea Index: Apneas with >=3% oxygen desaturation and with or without arousal+ hypopneas with > 30% flow reduction and >=3% oxygen desaturation and with or without arousal / hour of sleep from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
rdi3pa
Apnea-Hypopnea Index: Apneas with >=3% oxygen desaturation or with arousal+ hypopneas with > 30% flow reduction and >=3% oxygen desaturation or with arousal / hour of sleep from type II polysomnography
Apnea-Hypopnea Index: Apneas with >=3% oxygen desaturation or with arousal+ hypopneas with > 30% flow reduction and >=3% oxygen desaturation or with arousal / hour of sleep from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
rdi4p
Apnea-Hypopnea Index: Apneas with >=4% oxygen desaturation and with or without arousal+ hypopneas with > 30% flow reduction and >=4% oxygen desaturation and with or without arousal / hour of sleep from type II polysomnography
Apnea-Hypopnea Index: Apneas with >=4% oxygen desaturation and with or without arousal+ hypopneas with > 30% flow reduction and >=4% oxygen desaturation and with or without arousal / hour of sleep from type II polysomnography

Calculated - Summary metric of sleep disordered breathing events

Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices
ai_all
Arousal Index: Number of arousals per hour of sleep from type II polysomnography
Arousal Index: Number of arousals per hour of sleep from type II polysomnography

Total number of arousals per hour of sleep. Ratio of count of arousals to total sleep time in hours.

Sleep Monitoring/Polysomnography/Arousals
noplm
Total number of periodic limb movements in sleep from type II polysomnography
Total number of periodic limb movements in sleep from type II polysomnography Sleep Monitoring/Polysomnography/Limb Movements
plmaslp
Total number of periodic limb movements with arousal from type II polysomnography
Total number of periodic limb movements with arousal from type II polysomnography Sleep Monitoring/Polysomnography/Limb Movements
avgsat
Average oxygen saturation during total sleep duration from type II polysomnography
Average oxygen saturation during total sleep duration from type II polysomnography Sleep Monitoring/Polysomnography/Oxygen Saturation
minsat
Minimum oxygen saturation during total sleep duration from type II polysomnography
Minimum oxygen saturation during total sleep duration from type II polysomnography

Lowest oxygen saturation (SaO2)% during sleep

Sleep Monitoring/Polysomnography/Oxygen Saturation
longap
Maximum duration of apnea from type II polysomnography
Maximum duration of apnea from type II polysomnography Sleep Monitoring/Polysomnography/Respiratory Event Lengths
longhyp
Maximum duration of hypopnea associated with > 30% flow reduction and > 0% oxygen desaturation and with or without arousal from type II polysomnography
Maximum duration of hypopnea associated with > 30% flow reduction and > 0% oxygen desaturation and with or without arousal from type II polysomnography

entire recording

Sleep Monitoring/Polysomnography/Respiratory Event Lengths
oavgdur
Average duration of obstructive apnea from type II polysomnography
Average duration of obstructive apnea from type II polysomnography

entire recording

Sleep Monitoring/Polysomnography/Respiratory Event Lengths
overall
Overall study grade
Overall study grade Sleep Monitoring/Polysomnography/Signal Quality
oximdur
Hours of usable oximetry
Hours of usable oximetry Sleep Monitoring/Polysomnography/Signal Quality
posn
Position sensor working
Position sensor working

1=Position sensor working

Sleep Monitoring/Polysomnography/Signal Quality
quoxim
Quality of oximetry
Quality of oximetry Sleep Monitoring/Polysomnography/Signal Quality
slp_eff
Sleep Efficiency: the ratio of sleep duration (i.e. total sleep time) to in-bed period from type II polysomnography
Sleep Efficiency: the ratio of sleep duration (i.e. total sleep time) to in-bed period from type II polysomnography

Sleep duration is the interval between sleep onset time and lights on/out-bed time while asleep (i.e. total sleep time, TST), while in-bed period is the interval between lights off/in-bed time and lights on/out-bed time (i.e. time in bed, TIB).

Percentage of time in bed that was spent sleeping, or the ratio of total sleep time to total time in bed, expressed as a percentage.

Sleep Monitoring/Polysomnography/Sleep Architecture
slpprdp
Total Sleep Duration: the interval between sleep onset and sleep offset while the participant is asleep from type II polysomnography
Total Sleep Duration: the interval between sleep onset and sleep offset while the participant is asleep from type II polysomnography

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

Sleep Monitoring/Polysomnography/Sleep Architecture
nsrrid
NSRR Subject Identifier
NSRR Subject Identifier Administrative
v8folall
Overall follow-up time since visit 8
Overall follow-up time since visit 8 Administrative
visit
Visit number
Visit number

The Study of Osteoporotic Fractures (SOF) Visit where the data were collected/derived.

Administrative
v4hipg
Hip
Hip

This variable was collected at visit 4, a different timepoint than the 'Visit 8' sleep variables

Anthropometry
v4wais
Waist
Waist

This variable was collected at visit 4, a different timepoint than the 'Visit 8' sleep variables

Anthropometry
v4wsthip
Waist to hip ratio
Waist to hip ratio

This variable was collected at visit 4, a different timepoint than the 'Visit 8' sleep variables

Anthropometry
v8bmi
Body Mass Index (BMI)
Body Mass Index (BMI) Anthropometry
v8hght
Height
Height Anthropometry
v8wght
Weight
Weight Anthropometry
v8brstca
Indicators of occurrence of breast cancer
Indicators of occurrence of breast cancer Clinical Data/Incident Outcomes
v8dthash
Atherosclerosis cardio death
Atherosclerosis cardio death Clinical Data/Incident Outcomes/Cardiovascular Diseases
v8dthchd
Ischemic heart disease (IHD) death
Ischemic heart disease (IHD) death Clinical Data/Incident Outcomes/Cardiovascular Diseases
v8dthstk
Stroke death
Stroke death Clinical Data/Incident Outcomes/Cardiovascular Diseases
v8dthsud
Ischemic heart disease (IHD) and sudden death
Ischemic heart disease (IHD) and sudden death Clinical Data/Incident Outcomes/Cardiovascular Diseases
v1lbppls
Pulse lying down
Pulse lying down

This variable was collected at visit 1, a different timepoint than the 'Visit 8' sleep variables

Clinical Data/Vital Signs
v1sbppls
Pulse standing
Pulse standing

This variable was collected at visit 1, a different timepoint than the 'Visit 8' sleep variables

Clinical Data/Vital Signs
v8ppls
Average pulse
Average pulse Clinical Data/Vital Signs
v1lidias
Diastolic blood pressure (DBP) lying down
Diastolic blood pressure (DBP) lying down

This variable was collected at visit 1, a different timepoint than the 'Visit 8' sleep variables

Clinical Data/Vital Signs/Seated Blood Pressure
v1lisys
Systolic blood pressure (SBP) lying down
Systolic blood pressure (SBP) lying down

This variable was collected at visit 1, a different timepoint than the 'Visit 8' sleep variables

Clinical Data/Vital Signs/Seated Blood Pressure
v1stddia
Diastolic blood pressure (DBP) standing up
Diastolic blood pressure (DBP) standing up

This variable was collected at visit 1, a different timepoint than the 'Visit 8' sleep variables

Clinical Data/Vital Signs/Seated Blood Pressure
v1stdsys
Systolic blood pressure (SBP) standing up
Systolic blood pressure (SBP) standing up

This variable was collected at visit 1, a different timepoint than the 'Visit 8' sleep variables

Clinical Data/Vital Signs/Seated Blood Pressure
v8lbpdia
Diastolic blood pressure (DBP) sitting down from Visit 8
Diastolic blood pressure (DBP) sitting down from Visit 8 Clinical Data/Vital Signs/Seated Blood Pressure
v8lbpsys
Systolic blood pressure (SBP) sitting down from Visit 8
Systolic blood pressure (SBP) sitting down from Visit 8 Clinical Data/Vital Signs/Seated Blood Pressure
v9sitdia
Diastolic blood pressure (DBP) sitting down
Diastolic blood pressure (DBP) sitting down

This variable was collected at visit 9, a different timepoint than the 'Visit 8' sleep variables

Clinical Data/Vital Signs/Seated Blood Pressure
v9sitsys
Systolic blood pressure (SBP) sitting down
Systolic blood pressure (SBP) sitting down

This variable was collected at visit 9, a different timepoint than the 'Visit 8' sleep variables

Clinical Data/Vital Signs/Seated Blood Pressure
age_category
Age (categorical)
Age (categorical)

Age categorized into: 74 and under, 75 to 84, or 85 and older. Source: v8age at Visit 8

Demographics
race
Race
Race Demographics
v8age
Age of participant
Age of participant

Participant ages greater than 89 have been recoded into 90 for de-identification purposes.

Demographics
v1drink
In the past 12 months, have you had at least one drink of any kind of alcoholic beverage?
In the past 12 months, have you had at least one drink of any kind of alcoholic beverage?

This variable was collected at visit 1, a different timepoint than the 'Visit 8' sleep variables

Lifestyle and Behavioral Health
v1drwka
Drinks per week adjusted for atypical drinking
Drinks per week adjusted for atypical drinking

This variable was collected at visit 1, a different timepoint than the 'Visit 8' sleep variables

Lifestyle and Behavioral Health
v8dr30
During the last 30 days, have you had at least one drink of any kind of alcoholic beverage? (Including beer, wine, or mixed drinks such as martinis or manhattans.)
During the last 30 days, have you had at least one drink of any kind of alcoholic beverage? (Including beer, wine, or mixed drinks such as martinis or manhattans.) Lifestyle and Behavioral Health
v8drwk30
Which one of these statements comes closest to describing how often you drank any alcoholic beverages in the last 30 days?
Which one of these statements comes closest to describing how often you drank any alcoholic beverages in the last 30 days? Lifestyle and Behavioral Health
v8smok
Do you currently smoke cigarettes?
Do you currently smoke cigarettes? Lifestyle and Behavioral Health
v1diabcl
Diabetes with insulin info
Diabetes with insulin info

This variable was collected at visit 1, a different timepoint than the 'Visit 8' sleep variables

Medical History
v1hyten
Hypertension status
Hypertension status

Defined by systolic blood pressure > 160, diastolic blood pressure > 90, or use of thiazides. This variable was collected at visit 1, a different timepoint than the 'Visit 8' sleep variables.

Medical History
v2echf
Has a doctor ever told you that you have congestive heart failure (CHF)?
Has a doctor ever told you that you have congestive heart failure (CHF)?

This variable was collected at visit 2, a different timepoint than the 'Visit 8' sleep variables

Medical History
v2enghrt
Has a doctor ever told you that you have an enlarged heart?
Has a doctor ever told you that you have an enlarged heart?

This variable was collected at visit 2, a different timepoint than the 'Visit 8' sleep variables

Medical History
v4ekg
Has a doctor ever told you that you have an abnormal EKG, ECG, or electrocardiogram?
Has a doctor ever told you that you have an abnormal EKG, ECG, or electrocardiogram?

This variable was collected at visit 4, a different timepoint than the 'Visit 8' sleep variables

Medical History
v4hrtdtx
Are you currently being treated for this condition by a doctor?
Are you currently being treated for this condition by a doctor?

This variable was collected at visit 4, a different timepoint than the 'Visit 8' sleep variables

Medical History
v4seiz
Has a doctor ever told you that you have seizures (fits or convulsions)?
Has a doctor ever told you that you have seizures (fits or convulsions)?

This variable was collected at visit 4, a different timepoint than the 'Visit 8' sleep variables

Medical History
v5scancr
In the last two years, has a doctor told you that you have cancer?
In the last two years, has a doctor told you that you have cancer?

This variable was collected at visit 5, a different timepoint than the 'Visit 8' sleep variables

Medical History
v6sangin
Has a doctor or other health care provider ever told you that you had angina?
Has a doctor or other health care provider ever told you that you had angina?

This variable was collected at visit 6, a different timepoint than the 'Visit 8' sleep variables

Medical History