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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
sleepage5c
Participant Age at MESA Sleep Visit
Participant Age at MESA Sleep Visit Administrative
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/Arousal
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

Calculated. 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

Calculated

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

Calculated

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

Calculated

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

Calculated

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

Calculated

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. 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
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
pnn40_5m5
Adjacent normal-to-normal intervals, non-overlapping windows: Percentage of differences > 40 ms
Adjacent normal-to-normal intervals, non-overlapping windows: Percentage of differences > 40 ms Clinical Data/Diagnostic Studies/Heart Rate Variability/Non-Overlapping Windows
pnn50_5m5
Adjacent normal-to-normal intervals, non-overlapping windows: Percentage of differences > 50 ms
Adjacent normal-to-normal intervals, non-overlapping windows: Percentage of differences > 50 ms Clinical Data/Diagnostic Studies/Heart Rate Variability/Non-Overlapping Windows
rmssd_5m5
Adjacent normal-to-normal intervals, non-overlapping windows: Square root of the mean of the squares of differences
Adjacent normal-to-normal intervals, non-overlapping windows: Square root of the mean of the squares of differences Clinical Data/Diagnostic Studies/Heart Rate Variability/Non-Overlapping Windows
sdnn_5m5
Normal-to-normal intervals, non-overlapping windows: Standard deviation
Normal-to-normal intervals, non-overlapping windows: Standard deviation Clinical Data/Diagnostic Studies/Heart Rate Variability/Non-Overlapping Windows
totpwr_5m5
Normal-to-normal intervals up to 0.04 Hz, non-overlapping windows: Total spectral power
Normal-to-normal intervals up to 0.04 Hz, non-overlapping windows: Total spectral power Clinical Data/Diagnostic Studies/Heart Rate Variability/Non-Overlapping Windows
vlf_5m5
Normal-to-normal intervals between 0.003 and 0.04 Hz (and between 0 and 0.04 Hz in 5-minute windows), non-overlapping windows: 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), non-overlapping windows: Total spectral power Clinical Data/Diagnostic Studies/Heart Rate Variability/Non-Overlapping Windows
extrahrs5
Days per month working extra hours beyong usual schedule
Days per month working extra hours beyong usual schedule

Original question: 23. How many days per month do you work extra hours beyond your usual schedule?

Demographics/Employment
wrksched5
Usual work schedule
Usual work schedule

Original question: 22. Which of the following best describes your usual work schedule?

Demographics/Employment
avg24hrsleep5
Average daily total sleep duration in main sleep and naps combined in all days from actigraphy
Average daily total sleep duration in main sleep and naps combined in all days from actigraphy Sleep Monitoring/Actigraphy
avg24hrsleepnw5
Average daily total sleep duration in main sleep and naps combined in non-workdays from actigraphy
Average daily total sleep duration in main sleep and naps combined in non-workdays from actigraphy Sleep Monitoring/Actigraphy
avg24hrsleepwd5
Average daily total sleep duration in main sleep and naps combined in weekdays from actigraphy
Average daily total sleep duration in main sleep and naps combined in weekdays from actigraphy Sleep Monitoring/Actigraphy
avg24hrsleepwe5
Average daily total sleep duration in main sleep and naps combined in weekends from actigraphy
Average daily total sleep duration in main sleep and naps combined in weekends from actigraphy Sleep Monitoring/Actigraphy
avg24hrsleepwo5
Average daily total sleep duration in main sleep and naps combined in workdays from actigraphy
Average daily total sleep duration in main sleep and naps combined in workdays from actigraphy Sleep Monitoring/Actigraphy
avgbluetalt5
Average blue light time above 1,000 microwatts per square centimeter threshold over 24-hour periods in all days from actigraphy
Average blue light time above 1,000 microwatts per square centimeter threshold over 24-hour periods in all days from actigraphy Sleep Monitoring/Actigraphy
avgbluetaltnw5
Average blue light time above 1,000 microwatts per square centimeter threshold over 24-hour periods in non-workdays from actigraphy
Average blue light time above 1,000 microwatts per square centimeter threshold over 24-hour periods in non-workdays from actigraphy Sleep Monitoring/Actigraphy
avgbluetaltwd5
Average blue light time above 1,000 microwatts per square centimeter threshold over 24-hour periods in weekdays from actigraphy
Average blue light time above 1,000 microwatts per square centimeter threshold over 24-hour periods in weekdays from actigraphy Sleep Monitoring/Actigraphy
avgbluetaltwe5
Average blue light time above 1,000 microwatts per square centimeter threshold over 24-hour periods in weekends from actigraphy
Average blue light time above 1,000 microwatts per square centimeter threshold over 24-hour periods in weekends from actigraphy Sleep Monitoring/Actigraphy
avgbluetaltwo5
Average blue light time above 1,000 microwatts per square centimeter threshold over 24-hour periods in workdays from actigraphy
Average blue light time above 1,000 microwatts per square centimeter threshold over 24-hour periods in workdays from actigraphy Sleep Monitoring/Actigraphy
avgefficiencynw5
Average daily sleep efficiency in non-workdays from actigraphy
Average daily sleep efficiency in non-workdays 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
avgefficiencywd5
Average daily sleep efficiency in weekdays from actigraphy
Average daily sleep efficiency in weekdays 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
avgefficiencywe5
Average daily sleep efficiency in weekends from actigraphy
Average daily sleep efficiency in weekends 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
avgefficiencywo5
Average daily sleep efficiency in workdays from actigraphy
Average daily sleep efficiency in workdays 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
avgfragmentation5
Average daily total sleep fragmentation index in main sleep in all days from actigraphy
Average daily total sleep fragmentation index in main sleep in all days from actigraphy

Sleep Fragmentation is an index of restlessness during the sleep period expressed as a percentage. Kristen L et al. 2011 (PubMed ID:21411507)

There are three type of measures for sleep fragmentation: movement Index (MI), fragmentation index (FI), and total sleep fragmentation Index. The fragmentation index refers to the percentage of 60?s periods of sleep out of the total number of periods of immobility. The movement index refers to the total of scored awake minutes divided by sleep period (i.e. total time in bed). The total sleep fragmentation index is the sum of FI and MI. (ActiGraph validation reference)[https://actigraphcorp.force.com/support/s/article/Sleep-Fragmentation-Index-Validation-Reference]

Sleep Monitoring/Actigraphy
avgfragmentationnw5
Average daily total sleep fragmentation index in main sleep in non-workdays from actigraphy
Average daily total sleep fragmentation index in main sleep in non-workdays from actigraphy

Sleep Fragmentation is an index of restlessness during the sleep period expressed as a percentage. Kristen L et al. 2011 (PubMed ID:21411507)

There are three type of measures for sleep fragmentation: movement Index (MI), fragmentation index (FI), and total sleep fragmentation Index. The fragmentation index refers to the percentage of 60?s periods of sleep out of the total number of periods of immobility. The movement index refers to the total of scored awake minutes divided by sleep period (i.e. total time in bed). The total sleep fragmentation index is the sum of FI and MI. (ActiGraph validation reference)[https://actigraphcorp.force.com/support/s/article/Sleep-Fragmentation-Index-Validation-Reference]

Sleep Monitoring/Actigraphy
avgfragmentationwd5
Average daily total sleep fragmentation index in main sleep in weekdays from actigraphy
Average daily total sleep fragmentation index in main sleep in weekdays from actigraphy

Sleep Fragmentation is an index of restlessness during the sleep period expressed as a percentage. Kristen L et al. 2011 (PubMed ID:21411507)

There are three type of measures for sleep fragmentation: movement Index (MI), fragmentation index (FI), and total sleep fragmentation Index. The fragmentation index refers to the percentage of 60?s periods of sleep out of the total number of periods of immobility. The movement index refers to the total of scored awake minutes divided by sleep period (i.e. total time in bed). The total sleep fragmentation index is the sum of FI and MI. (ActiGraph validation reference)[https://actigraphcorp.force.com/support/s/article/Sleep-Fragmentation-Index-Validation-Reference]

Sleep Monitoring/Actigraphy
avgfragmentationwe5
Average daily total sleep fragmentation index in main sleep in weekends from actigraphy
Average daily total sleep fragmentation index in main sleep in weekends from actigraphy

Sleep Fragmentation is an index of restlessness during the sleep period expressed as a percentage. Kristen L et al. 2011 (PubMed ID:21411507)

There are three type of measures for sleep fragmentation: movement Index (MI), fragmentation index (FI), and total sleep fragmentation Index. The fragmentation index refers to the percentage of 60?s periods of sleep out of the total number of periods of immobility. The movement index refers to the total of scored awake minutes divided by sleep period (i.e. total time in bed). The total sleep fragmentation index is the sum of FI and MI. (ActiGraph validation reference)[https://actigraphcorp.force.com/support/s/article/Sleep-Fragmentation-Index-Validation-Reference]

Sleep Monitoring/Actigraphy
avgfragmentationwo5
Average daily total sleep fragmentation index in main sleep in workdays from actigraphy
Average daily total sleep fragmentation index in main sleep in workdays from actigraphy

Sleep Fragmentation is an index of restlessness during the sleep period expressed as a percentage. Kristen L et al. 2011 (PubMed ID:21411507)

There are three type of measures for sleep fragmentation: movement Index (MI), fragmentation index (FI), and total sleep fragmentation Index. The fragmentation index refers to the percentage of 60?s periods of sleep out of the total number of periods of immobility. The movement index refers to the total of scored awake minutes divided by sleep period (i.e. total time in bed). The total sleep fragmentation index is the sum of FI and MI. (ActiGraph validation reference)[https://actigraphcorp.force.com/support/s/article/Sleep-Fragmentation-Index-Validation-Reference]

Sleep Monitoring/Actigraphy
avggreentalt5
Average green light time above 1,000 microwatts per square centimeter threshold over 24-hour periods in all days from actigraphy
Average green light time above 1,000 microwatts per square centimeter threshold over 24-hour periods in all days from actigraphy Sleep Monitoring/Actigraphy
avggreentaltnw5
Average green light time above 1,000 microwatts per square centimeter threshold over 24-hour periods non-workdays from actigraphy
Average green light time above 1,000 microwatts per square centimeter threshold over 24-hour periods non-workdays from actigraphy Sleep Monitoring/Actigraphy