MESA Variables - Sleep Data - National Sleep Research Resource

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

Multi-Ethnic Study of Atherosclerosis