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Multi-Ethnic Study of Atherosclerosis

Name Label Folder
cucmcn1c
Current participant consent for commercial use of data
Current participant consent for commercial use of data Administrative
examnumber
MESA exam number
MESA exam number

Note: The MESA Sleep ancillary study took place during MESA Exam 5.

Administrative
gender1
Gender of the participant
Gender of the participant Administrative
mesaid
MESA BioLINCC ID
MESA BioLINCC ID

This subject identifier code matches what has been used previously in MESA datasets on BioLINCC.

Administrative
race1c
Race/ethnicity of the participant
Race/ethnicity of the participant

Note from MESA Coordinating Center: It is recommended that Investigators make use of the terminology "race/ethnicity" when publishing or presenting variable race1c results (e.g. descriptive summaries, associations, ...). It has been noted that Chinese and Hispanic are not race groups, and that race itself is an ill-defined, non-scientific concept.

Administrative
site5c
Site at Exam 5
Site at Exam 5 Administrative
sleepage5c
Participant Age at MESA Sleep Visit
Participant Age at MESA Sleep Visit Administrative
nsrr_bmi
Body mass index (BMI)
Body mass index (BMI)

Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: bmi5c

Harmonized/Anthropometry
nsrr_age
Subject age
Subject age

Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: sleepage5c at Visit 5

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

Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: sleepage5c at Visit 5

Harmonized/Demographics
nsrr_race
Subject race
Subject race

Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: race1c at Visit 5

Harmonized/Demographics
nsrr_sex
Subject sex
Subject sex

Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: gender1 at Visit 5

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: cursmk5

Harmonized/Lifestyle and Behavioral Health
nsrr_ever_smoker
Ever smoked cigarettes
Ever smoked cigarettes

Indicates whether subject ever regularly smoked cigarettes.

Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: smkstat5

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

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

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

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

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_all5

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: slewake5

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

Harmonized by the NSRR team. Source: timest1p5

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

Harmonized by the NSRR team. Source: timest2p5

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

Harmonized by the NSRR team. Source: times34p5

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: timeremp5

Harmonized/Polysomnography/Sleep Architecture
nsrr_tib_f1
Total In-bed Period: the interval between lights off/in-bed time and lights on/out-bed time from polysomnography
Total In-bed Period: the interval between lights off/in-bed time and lights on/out-bed time from polysomnography

Harmonized by the NSRR team. Conventionally, this would be called time in bed (TIB)

Source: time_bed5

Harmonized/Polysomnography/Sleep Architecture
nsrr_tst_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: slpprdp5

Harmonized/Polysomnography/Sleep Architecture
nsrr_ttldursp_s1sr
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: remlaiip5

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

Harmonized by the NSRR team. Source: slp_eff5

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

Harmonized by the NSRR team. Source: slp_lat5

Harmonized/Polysomnography/Sleep Architecture
nsrr_ttlmefsp_f1
Sleep Maintenance Efficiency: the proportion of total sleep duration (i.e., total sleep time) in sleep period (i.e., interval between sleep onset and offset including wake) from polysomnography
Sleep Maintenance Efficiency: the proportion of total sleep duration (i.e., total sleep time) in sleep period (i.e., interval between sleep onset and offset including wake) from polysomnography

Harmonized by the NSRR team. Source: slp_maint_eff5

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: rem_lat15

Harmonized/Polysomnography/Sleep Architecture
nsrr_waso_f1
Wake After Sleep Onset: the total duration being awake between sleep onset and lights-on/out-bed time from polysomnography
Wake After Sleep Onset: the total duration being awake between sleep onset and lights-on/out-bed time from polysomnography

Harmonized by the NSRR team. Source: waso5

Harmonized/Polysomnography/Sleep Architecture
avgefficiency5
Average daily sleep efficiency in all days from actigraphy
Average daily sleep efficiency in all days from actigraphy

Sleep efficiency is the proportion of sleep duration (i.e. total sleep time, tst) in total rest period (i.e. rest interval) in main sleep. Sleep duration is the interval between sleep onset time and sleep offset time while asleep. In this study, rest interval is the same as in-bed period.

Sleep Monitoring/Actigraphy
avgmainsleep5
Average daily total sleep duration in main sleep in all days from actigraphy
Average daily total sleep duration in main sleep in all days from actigraphy

Conventionally this variable would be called total sleep time (TST)

Sleep Monitoring/Actigraphy
avgsleepmidpoint5
Average daily midpoint for sleep period in all days from actigraphy
Average daily midpoint for sleep period in all days from actigraphy

Sleep period is the interval between sleep onset time and sleep offset time in main sleep.

Sleep Monitoring/Actigraphy
avgwaso5
Average daily duration of wake after sleep onset (waso) in all days from actigraphy
Average daily duration of wake after sleep onset (waso) in all days from actigraphy

WASO is the duration of being awake between sleep onset and offset time in main sleep.

Sleep Monitoring/Actigraphy
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

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.

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.

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.

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.

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
oahi35
Obstructive Apnea Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal+ hypopneas with > 30% flow reduction and no oxygen desaturation threshold used 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 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
ai_all5
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

Calculated

Sleep Monitoring/Polysomnography/Arousals
avgplm5
Number of periodic limb movements per hour of sleep from type II polysomnography
Number of periodic limb movements per hour of sleep from type II polysomnography Sleep Monitoring/Polysomnography/Limb Movements
pctlt905
Percent total sleep duration with below 90% oxygen saturation from type II polysomnography
Percent total sleep duration with below 90% oxygen saturation from type II polysomnography

Calculated

Sleep Monitoring/Polysomnography/Oxygen Saturation
cent_obs_ratio
Ratio of the number of central apneas with no oxygen desaturation threshold used and with or without arousal to the number of obstructive apneas with no oxygen desaturation threshold used and with or without arousal from type II polysomnography
Ratio of the number of central apneas with no oxygen desaturation threshold used and with or without arousal to the number of obstructive apneas with no oxygen desaturation threshold used and with or without arousal from type II polysomnography

Calculated

Sleep Monitoring/Polysomnography/Respiratory Event Counts
cent_obs_ratioa
Ratio of the number of central apneas with no oxygen desaturation threshold used or without arousal to the number of obstructive apneas with no oxygen desaturation threshold used or with arousal from type II polysomnography
Ratio of the number of central apneas with no oxygen desaturation threshold used or without arousal to the number of obstructive apneas with no oxygen desaturation threshold used or with arousal from type II polysomnography

Calculated

Sleep Monitoring/Polysomnography/Respiratory Event Counts
overall5
Overall Study Quality Grade from type II polysomnography
Overall Study Quality Grade from type II polysomnography Sleep Monitoring/Polysomnography/Signal Quality
slewake5
Study Scored Sleep / Wake Only (All Sleep Scored As N2 And No Arousals Scored Due To Poor Quality EEG) from type II polysomnography
Study Scored Sleep / Wake Only (All Sleep Scored As N2 And No Arousals Scored Due To Poor Quality EEG) from type II polysomnography Sleep Monitoring/Polysomnography/Signal Quality
time_bed5
Total In-bed Period: the interval between lights out/in-bed time and lights off/out-bed time from type II polysomnography
Total In-bed Period: the interval between lights out/in-bed time and lights off/out-bed time from type II polysomnography

Conventionally this variable would be called time in bed (TIB).

Sleep Monitoring/Polysomnography/Sleep Architecture
timeremp5
Percentage of total sleep duration in REM from type II polysomnography
Percentage of total sleep duration in REM from type II polysomnography Sleep Monitoring/Polysomnography/Sleep Architecture
times34p5
Percentage of total sleep duration in Stage 3 and 4 from type II polysomnography
Percentage of total sleep duration in Stage 3 and 4 from type II polysomnography Sleep Monitoring/Polysomnography/Sleep Architecture
timest1p5
Percentage of total sleep duration in Stage 1 from type II polysomnography
Percentage of total sleep duration in Stage 1 from type II polysomnography Sleep Monitoring/Polysomnography/Sleep Architecture
timest2p5
Percentage of total sleep duration in Stage 2 from type II polysomnography
Percentage of total sleep duration in Stage 2 from type II polysomnography Sleep Monitoring/Polysomnography/Sleep Architecture
waso5
Wake after Sleep Onset: the total duration between sleep onset and sleep offset time while being awake from type II polysomnography
Wake after Sleep Onset: the total duration between sleep onset and sleep offset time while being awake from type II polysomnography Sleep Monitoring/Polysomnography/Sleep Architecture
hoostmeq5c
Modified Horne-Ostberg Morningness-Eveningness Questionnaire (MEQ) Score
Modified Horne-Ostberg Morningness-Eveningness Questionnaire (MEQ) Score

Calculated Summary score based on modified Horne-Ostberg Morningness-Eveningness Questionnaire. Participants with an MEQ >= 18 were considered to have a morning preference, those with an MEQ between 11 and 18 were considered to have an intermediate preference, and participants with an MEQ <= 11 were considered to have an evening preference. Horne JA and Ostberg O, 1976 (PubMed ID: 1027738)

Search for all HOMEQ variables within this dataset

Sleep Questionnaires/Chronotype
epslpscl5c
Epworth Sleepiness Scale: Total score
Epworth Sleepiness Scale: Total score

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

Search for all ESS variables within this dataset

Sleep Questionnaires/Hypersomnia
whiirs5c
Women's Health Initiative Insomnia Rating Scale: Total score
Women's Health Initiative Insomnia Rating Scale: Total score

Calculated - The Women's Health Initiative Insomnia Rating Scale (WHIIRS) has 5 items. Each item is scored on a 5 point scale (from 0-4). The total score is the sum of all five items ranging from 0 to 20. Higher score indicates more severe insomnia. A score of 9 or higher is considered clinically significant insomnia. Levine et al.(2003)

Search for all WHIIRS variables within this dataset

Sleep Questionnaires/Sleep Disturbance
sleepqsid
Sleep questionnaire staff ID
Sleep questionnaire staff ID Administrative
bmi5c
Body mass index
Body mass index Anthropometry
htcm5
Height (cm)
Height (cm) Anthropometry
wtlb5
Weight (lbs)
Weight (lbs) Anthropometry
avnn_fn5
Normal-to-normal intervals, full night: Mean
Normal-to-normal intervals, full night: Mean Clinical Data/Diagnostic Studies/Heart Rate Variability/Full Night
hf_fn5
Normal-to-normal intervals between 0.15 and 0.4 Hz, full night: Total spectral power
Normal-to-normal intervals between 0.15 and 0.4 Hz, full night: Total spectral power Clinical Data/Diagnostic Studies/Heart Rate Variability/Full Night
hfn_fn5
Low frequency power, full night: Normalized ratio
Low frequency power, full night: Normalized ratio Clinical Data/Diagnostic Studies/Heart Rate Variability/Full Night
ihr_fn5
Instantaneous heart rate, full night: Average
Instantaneous heart rate, full night: Average Clinical Data/Diagnostic Studies/Heart Rate Variability/Full Night
lf_fn5
Normal-to-normal intervals between 0.04 and 0.15 Hz, full night: Total spectral power
Normal-to-normal intervals between 0.04 and 0.15 Hz, full night: Total spectral power Clinical Data/Diagnostic Studies/Heart Rate Variability/Full Night
lf_hf_fn5
Low frequency power / high frequency power, full night
Low frequency power / high frequency power, full night Clinical Data/Diagnostic Studies/Heart Rate Variability/Full Night
lfn_fn5
High frequency power, full night: Normalized ratio
High frequency power, full night: Normalized ratio Clinical Data/Diagnostic Studies/Heart Rate Variability/Full Night
nn_rr_fn5
Consecutive normal-to-normal intervals / all inter-beat intervals, full night
Consecutive normal-to-normal intervals / all inter-beat intervals, full night Clinical Data/Diagnostic Studies/Heart Rate Variability/Full Night
pnn10_fn5
Adjacent normal-to-normal intervals, full night: Percentage of differences > 10 ms
Adjacent normal-to-normal intervals, full night: Percentage of differences > 10 ms Clinical Data/Diagnostic Studies/Heart Rate Variability/Full Night
pnn20_fn5
Adjacent normal-to-normal intervals, full night: Percentage of differences > 20 ms
Adjacent normal-to-normal intervals, full night: Percentage of differences > 20 ms Clinical Data/Diagnostic Studies/Heart Rate Variability/Full Night
pnn30_fn5
Adjacent normal-to-normal intervals, full night: Percentage of differences > 30 ms
Adjacent normal-to-normal intervals, full night: Percentage of differences > 30 ms Clinical Data/Diagnostic Studies/Heart Rate Variability/Full Night
pnn40_fn5
Adjacent normal-to-normal intervals, full night: Percentage of differences > 40 ms
Adjacent normal-to-normal intervals, full night: Percentage of differences > 40 ms Clinical Data/Diagnostic Studies/Heart Rate Variability/Full Night
pnn50_fn5
Adjacent normal-to-normal intervals, full night: Percentage of differences > 50 ms
Adjacent normal-to-normal intervals, full night: Percentage of differences > 50 ms Clinical Data/Diagnostic Studies/Heart Rate Variability/Full Night
rmssd_fn5
Adjacent normal-to-normal intervals, full night: Square root of the mean of the squares of differences
Adjacent normal-to-normal intervals, full night: Square root of the mean of the squares of differences Clinical Data/Diagnostic Studies/Heart Rate Variability/Full Night
sdann_fn5
Normal-to-normal intervals in all 5-minute segments, full night: Standard deviation of the averages
Normal-to-normal intervals in all 5-minute segments, full night: Standard deviation of the averages Clinical Data/Diagnostic Studies/Heart Rate Variability/Full Night
sdnn_fn5
Normal-to-normal intervals, full night: Standard deviation
Normal-to-normal intervals, full night: Standard deviation Clinical Data/Diagnostic Studies/Heart Rate Variability/Full Night
sdnnidx_fn5
Normal-to-normal intervals in all 5-minute segments, full night: Mean of the standard deviations
Normal-to-normal intervals in all 5-minute segments, full night: Mean of the standard deviations Clinical Data/Diagnostic Studies/Heart Rate Variability/Full Night
totpwr_fn5
Normal-to-normal intervals up to 0.04 Hz, full night: Total spectral power
Normal-to-normal intervals up to 0.04 Hz, full night: Total spectral power Clinical Data/Diagnostic Studies/Heart Rate Variability/Full Night
ulf_fn5
Normal-to-normal intervals up to 0.003 Hz, full night: Total spectral power
Normal-to-normal intervals up to 0.003 Hz, full night: Total spectral power Clinical Data/Diagnostic Studies/Heart Rate Variability/Full Night
vlf_fn5
Normal-to-normal intervals between 0.003 and 0.04 Hz (and between 0 and 0.04 Hz in 5-minute windows), full night: Total spectral power
Normal-to-normal intervals between 0.003 and 0.04 Hz (and between 0 and 0.04 Hz in 5-minute windows), full night: Total spectral power Clinical Data/Diagnostic Studies/Heart Rate Variability/Full Night
avnn_5m5
Normal-to-normal intervals, non-overlapping windows: Mean
Normal-to-normal intervals, non-overlapping windows: Mean Clinical Data/Diagnostic Studies/Heart Rate Variability/Non-Overlapping Windows
hf_5m5
Normal-to-normal intervals between 0.15 and 0.4 Hz, non-overlapping windows: Total spectral power
Normal-to-normal intervals between 0.15 and 0.4 Hz, non-overlapping windows: Total spectral power Clinical Data/Diagnostic Studies/Heart Rate Variability/Non-Overlapping Windows
hfn_5m5
Low frequency power, non-overlapping windows: Normalized ratio
Low frequency power, non-overlapping windows: Normalized ratio Clinical Data/Diagnostic Studies/Heart Rate Variability/Non-Overlapping Windows
ihr_5m5
Instantaneous heart rate, non-overlapping windows: Average
Instantaneous heart rate, non-overlapping windows: Average Clinical Data/Diagnostic Studies/Heart Rate Variability/Non-Overlapping Windows
lf_5m5
Normal-to-normal intervals between 0.04 and 0.15 Hz, non-overlapping windows: Total spectral power
Normal-to-normal intervals between 0.04 and 0.15 Hz, non-overlapping windows: Total spectral power Clinical Data/Diagnostic Studies/Heart Rate Variability/Non-Overlapping Windows
lf_hf_5m5
Low frequency power / high frequency power, non-overlapping windows
Low frequency power / high frequency power, non-overlapping windows Clinical Data/Diagnostic Studies/Heart Rate Variability/Non-Overlapping Windows
lfn_5m5
High frequency power, non-overlapping windows: Normalized ratio
High frequency power, non-overlapping windows: Normalized ratio Clinical Data/Diagnostic Studies/Heart Rate Variability/Non-Overlapping Windows
nn_rr_5m5
Consecutive normal-to-normal intervals / all inter-beat intervals, non-overlapping windows
Consecutive normal-to-normal intervals / all inter-beat intervals, non-overlapping windows Clinical Data/Diagnostic Studies/Heart Rate Variability/Non-Overlapping Windows
pnn10_5m5
Adjacent normal-to-normal intervals, non-overlapping windows: Percentage of differences > 10 ms
Adjacent normal-to-normal intervals, non-overlapping windows: Percentage of differences > 10 ms Clinical Data/Diagnostic Studies/Heart Rate Variability/Non-Overlapping Windows
pnn20_5m5
Adjacent normal-to-normal intervals, non-overlapping windows: Percentage of differences > 20 ms
Adjacent normal-to-normal intervals, non-overlapping windows: Percentage of differences > 20 ms Clinical Data/Diagnostic Studies/Heart Rate Variability/Non-Overlapping Windows
pnn30_5m5
Adjacent normal-to-normal intervals, non-overlapping windows: Percentage of differences > 30 ms
Adjacent normal-to-normal intervals, non-overlapping windows: Percentage of differences > 30 ms Clinical Data/Diagnostic Studies/Heart Rate Variability/Non-Overlapping Windows