Sleep Monitoring - Polysomnography - SHHS Variables - Sleep Data - National Sleep Research Resource - NSRR

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	Name	Label	Folder
	ai_rem Arousal Index (REM): Arousals per hour of REM sleep from type II polysomnography	Arousal Index (REM): Arousals per hour of REM sleep from type II polysomnography	Sleep Monitoring/Polysomnography/Arousals
	arnrembp Total number of arousals during NREM sleep in supine position from type II polysomnography	Total number of arousals during NREM sleep in supine position from type II polysomnography	Sleep Monitoring/Polysomnography/Arousals
	arnremop Total number of arousals during NREM sleep in non-supine position from type II polysomnography	Total number of arousals during NREM sleep in non-supine position from type II polysomnography	Sleep Monitoring/Polysomnography/Arousals
	arrembp Total number of arousals during REM sleep in supine position from type II polysomnography	Total number of arousals during REM sleep in supine position from type II polysomnography	Sleep Monitoring/Polysomnography/Arousals
	arremop Total number of arousals during REM sleep in non-supine position from type II polysomnography	Total number of arousals during REM sleep in non-supine position from type II polysomnography	Sleep Monitoring/Polysomnography/Arousals
	alpha_intrusion_pct_3sepochs Alpha intrusion (% of 3-s epochs)	Alpha intrusion (% of 3-s epochs) Percent of 3-sec epochs with alpha power >30mV² Younes et al. 2021 (PubMed ID: 34156473) Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	avg_normalized_eeg_power Average Normalized EEG Power	Average Normalized EEG Power In some PSGs the EEG is generally low in amplitude in all frequency ranges while in others it is high. The reasons for these differences could be technical (distance between active and reference electrode, electrode impedance), biological (e.g. age, skin or skull impedance) or some other reason Younes et al. 2021 (PubMed ID: 34156473). This index was recently found to be a risk factor for future development of dementia (Stone et al. 2018). In addition, it was found to be highly reproducible across 5 years of follow up. A high value also results in artifactually high spindle power and density and higher alpha intrusion. Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	avg_org_trt Average ORP Over Total Recording Time	Average ORP Over Total Recording Time Average Odds Ratio Product (ORP) in all 30-s epochs during total recording time. ORP is a continuous index of sleep depth and wake propensity. A value of 0 indicates very deep sleep, a value of 2.5 indicates full wakefulness. Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	avg_orp_last120m_nrem Avg ORP Last 120 min NREM	Avg ORP Last 120 min NREM Used (along with min_orp_firsthalf_nrem) to calculate diff_orp. Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	avg_orp_n1 Average ORP During N1	Average ORP During N1 Average Odds Ratio Product (ORP) in all 30-s epochs during manually scored sleep stages. ORP is a continuous index of sleep depth and wake propensity. A value of 0 indicates very deep sleep, a value of 2.5 indicates full wakefulness. Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	avg_orp_n2 Average ORP During N2	Average ORP During N2 Average Odds Ratio Product (ORP) in all 30-s epochs during manually scored sleep stages. ORP is a continuous index of sleep depth and wake propensity. A value of 0 indicates very deep sleep, a value of 2.5 indicates full wakefulness. Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	avg_orp_n3 Average ORP During N3	Average ORP During N3 Average Odds Ratio Product (ORP) in all 30-s epochs during manually scored sleep stages. ORP is a continuous index of sleep depth and wake propensity. A value of 0 indicates very deep sleep, a value of 2.5 indicates full wakefulness. Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	avg_orp_nonrem Average ORP During non-REM	Average ORP During non-REM Average Odds Ratio Product (ORP) in all 30-s epochs during manually scored sleep stages. ORP is a continuous index of sleep depth and wake propensity. A value of 0 indicates very deep sleep, a value of 2.5 indicates full wakefulness. Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	avg_orp_rem Average ORP During REM	Average ORP During REM Average Odds Ratio Product (ORP) in all 30-s epochs during manually scored sleep stages. ORP is a continuous index of sleep depth and wake propensity. A value of 0 indicates very deep sleep, a value of 2.5 indicates full wakefulness. Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	avg_orp_wake Average ORP During Wake	Average ORP During Wake Average Odds Ratio Product (ORP) in all 30-s epochs during manually scored sleep stages. ORP is a continuous index of sleep depth and wake propensity. A value of 0 indicates very deep sleep, a value of 2.5 indicates full wakefulness. Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	baseline_hr Arousal Characteristics - Baseline HR	Arousal Characteristics - Baseline HR Heart rate in repsonse to arousals. Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	change_in_hr_perh_trt Arousal Characteristics - Change in HR per hr of TRT	Arousal Characteristics - Change in HR per hr of TRT Heart rate in repsonse to arousals. Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	clinical_category Clinical Category	Clinical Category Clinical Category as per Younes et al. 2021 (PubMed ID: 34156473) Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	delta_hr Arousal Characteristics - Delta HR	Arousal Characteristics - Delta HR Heart rate in repsonse to arousals. Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	dhr_intensity Arousal Characteristics - dHR/ Intensity	Arousal Characteristics - dHR/ Intensity Heart rate in repsonse to arousals. Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	diff_orp Change in ORP across the night	Change in ORP across the night Change in Odds Ratio Product (ORP) across the night, a greater increase in ORP from the beginning of to end of the night suggests more restorative sleep. Younes et al. 2020 (PubMed ID: 32729619). Source: avg_orp_last120m_nrem and min_orp_firsthalf_nrem. Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	icc_ms_cols Breakdown of ICC components - MS Columns	Breakdown of ICC components - MS Columns Component of intraclass correlation, see icc_rl_orp for more information. Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	icc_ms_error Breakdown of ICC components - MS Error	Breakdown of ICC components - MS Error Component of intraclass correlation, see icc_rl_orp for more information. Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	icc_ms_rows Breakdown of ICC components - MS Rows	Breakdown of ICC components - MS Rows Component of intraclass correlation, see icc_rl_orp for more information. Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	icc_rl_orp Icc R/L Orp	Icc R/L Orp Intraclass correlation between right and left Odds Ratio Product (ORP) across all epochs in Total Recording Time (TRT). A high correlation indicates good agreement in sleep depth between right and left hemispheres. The reasons for a low correlation could be: a) reduced range of ORP across TRT (e.g., little stage wake or deep sleep) b) systematic difference between the two electrodes (e.g. noise in one electrode or unilateral brain pathology) c) true dissociation between right and left sleep (Dolphin sleep). icc_ms_rows, icc_ms_col and icc_ms_error distinguish between these three possibilities, respectively. Younes et al. 2021 (PubMed ID: 34156473) Dres et al. 2019 (PubMed ID: 30818966) Azarbarzin et al. 2021 (PubMed ID: 32441843) Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	intensity_scale Arousal Characteristics - Intensity Scale	Arousal Characteristics - Intensity Scale Arousal intensity on a scale from 1 to 9 (Younes 2017). Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	min_orp_firsthalf_nrem Min ORP First Half NREM	Min ORP First Half NREM Used (along with avg_orp_last120m_nrem) to calculate diff_orp. Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	orpto9 Orp-9	Orp-9 Rate of sleep recovery following arousals. A high value reflects slow recovery and suggests high central arousability (Hyperarousal state). Younes et al. 2021 (PubMed ID: 34156473) Younes and Hanley 2016 (PubMed ID: 26718786) Younes and Giannouli 2020 (PubMed ID: 31992415) Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	orp_type ORP Type	ORP Type Nine Odds Ratio Product (ORP) types with different potential mechanisms and associations with demographics, clinical phenotypes and outcomes. Source: sum_deciles_1and2 Younes et al. 2022 (PubMed ID: 35272350) Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	pct_epoch_0_25to0_5pct Distribution of epochs in 0.25-0.5% ORP decile	Distribution of epochs in 0.25-0.5% ORP decile Distribution of 30-s epochs, as a percent of total recording time in different Odds Ratio Product (ORP) deciles. Younes et al. 2022 (PubMed ID: 35272350) ORP is a continuous index of sleep depth and wake propensity. A value of 0 indicates very deep sleep; a value of 2.5 indicates full wakefulness. These values are used to construct the ORP histogram and ORP phenotype (orp_type). Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	pct_epoch_0_5to0_75pct Distribution of epochs in 0.5-0.75% ORP decile	Distribution of epochs in 0.5-0.75% ORP decile Distribution of 30-s epochs, as a percent of total recording time in different Odds Ratio Product (ORP) deciles. Younes et al. 2022 (PubMed ID: 35272350) ORP is a continuous index of sleep depth and wake propensity. A value of 0 indicates very deep sleep; a value of 2.5 indicates full wakefulness. These values are used to construct the ORP histogram and ORP phenotype (orp_type). Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	pct_epoch_0_75to1pct Distribution of epochs in 0.75-1.0% ORP decile	Distribution of epochs in 0.75-1.0% ORP decile Distribution of 30-s epochs, as a percent of total recording time in different Odds Ratio Product (ORP) deciles. Younes et al. 2022 (PubMed ID: 35272350) ORP is a continuous index of sleep depth and wake propensity. A value of 0 indicates very deep sleep; a value of 2.5 indicates full wakefulness. These values are used to construct the ORP histogram and ORP phenotype (orp_type). Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	pct_epoch_0to_0_25pct Distribution of epochs in 0-0.25% ORP decile	Distribution of epochs in 0-0.25% ORP decile Distribution of 30-s epochs, as a percent of total recording time in different Odds Ratio Product (ORP) deciles. Younes et al. 2022 (PubMed ID: 35272350) ORP is a continuous index of sleep depth and wake propensity. A value of 0 indicates very deep sleep; a value of 2.5 indicates full wakefulness. These values are used to construct the ORP histogram and ORP phenotype (orp_type). Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	pct_epoch_1_25to1_5pct Distribution of epochs in 1.25-1.5% ORP decile	Distribution of epochs in 1.25-1.5% ORP decile Distribution of 30-s epochs, as a percent of total recording time in different Odds Ratio Product (ORP) deciles. Younes et al. 2022 (PubMed ID: 35272350) ORP is a continuous index of sleep depth and wake propensity. A value of 0 indicates very deep sleep; a value of 2.5 indicates full wakefulness. These values are used to construct the ORP histogram and ORP phenotype (orp_type). Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	pct_epoch_1_5to1_75pct Distribution of epochs in 1.5-1.75% ORP decile	Distribution of epochs in 1.5-1.75% ORP decile Distribution of 30-s epochs, as a percent of total recording time in different Odds Ratio Product (ORP) deciles. Younes et al. 2022 (PubMed ID: 35272350) ORP is a continuous index of sleep depth and wake propensity. A value of 0 indicates very deep sleep; a value of 2.5 indicates full wakefulness. These values are used to construct the ORP histogram and ORP phenotype (orp_type). Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	pct_epoch_1_75to2pct Distribution of epochs in 1.75-2.0% ORP decile	Distribution of epochs in 1.75-2.0% ORP decile Distribution of 30-s epochs, as a percent of total recording time in different Odds Ratio Product (ORP) deciles. Younes et al. 2022 (PubMed ID: 35272350) ORP is a continuous index of sleep depth and wake propensity. A value of 0 indicates very deep sleep; a value of 2.5 indicates full wakefulness. These values are used to construct the ORP histogram and ORP phenotype (orp_type). Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	pct_epoch_1to1_25pct Distribution of epochs in 1.0-1.25% ORP decile	Distribution of epochs in 1.0-1.25% ORP decile Distribution of 30-s epochs, as a percent of total recording time in different Odds Ratio Product (ORP) deciles. Younes et al. 2022 (PubMed ID: 35272350) ORP is a continuous index of sleep depth and wake propensity. A value of 0 indicates very deep sleep; a value of 2.5 indicates full wakefulness. These values are used to construct the ORP histogram and ORP phenotype (orp_type). Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	pct_epoch_2_25to2_5pct Distribution of epochs in 2.25-2.5% ORP decile	Distribution of epochs in 2.25-2.5% ORP decile Distribution of 30-s epochs, as a percent of total recording time in different Odds Ratio Product (ORP) deciles. Younes et al. 2022 (PubMed ID: 35272350) ORP is a continuous index of sleep depth and wake propensity. A value of 0 indicates very deep sleep; a value of 2.5 indicates full wakefulness. These values are used to construct the ORP histogram and ORP phenotype (orp_type). Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	pct_epoch_2to2_25pct Distribution of epochs in 2.0-2.25% ORP decile	Distribution of epochs in 2.0-2.25% ORP decile Distribution of 30-s epochs, as a percent of total recording time in different Odds Ratio Product (ORP) deciles. Younes et al. 2022 (PubMed ID: 35272350) ORP is a continuous index of sleep depth and wake propensity. A value of 0 indicates very deep sleep; a value of 2.5 indicates full wakefulness. These values are used to construct the ORP histogram and ORP phenotype (orp_type). Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	powers_c3a2_alpha Powers C3/A2 (mV^2) - Alpha (7.33-12.0)	Powers C3/A2 (mV^2) - Alpha (7.33-12.0) Average power in all 3-s epochs in the indicated frequency range after excluding the highest 10% of values, which generally represent noise. Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	powers_c3a2_beta1 Powers C3/A2 (mV^2) - Beta1 (14.3-20.0)	Powers C3/A2 (mV^2) - Beta1 (14.3-20.0) Average power in all 3-s epochs in the indicated frequency range after excluding the highest 10% of values, which generally represent noise. Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	powers_c3a2_beta2 Powers C3/A2 (mV^2) - Beta2 (20.3-35)	Powers C3/A2 (mV^2) - Beta2 (20.3-35) Average power in all 3-s epochs in the indicated frequency range after excluding the highest 10% of values, which generally represent noise. Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	powers_c3a2_delta Powers C3/A2 (mV^2) - Delta (0.33-2.33 Hz)	Powers C3/A2 (mV^2) - Delta (0.33-2.33 Hz) Average power in all 3-s epochs in the indicated frequency range after excluding the highest 10% of values, which generally represent noise. Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	powers_c3a2_gammaomega Powers C3/A2 (mV^2) - Gamma Omega (35.3-60.0)	Powers C3/A2 (mV^2) - Gamma Omega (35.3-60.0) Average power in all 3-s epochs in the indicated frequency range after excluding the highest 10% of values, which generally represent noise. Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	powers_c3a2_sigma Powers C3/A2 (mV^2) - Sigma (12.33-14.0)	Powers C3/A2 (mV^2) - Sigma (12.33-14.0) Average power in all 3-s epochs in the indicated frequency range after excluding the highest 10% of values, which generally represent noise. Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	powers_c3a2_theta1 Powers C3/A2 (mV^2) - Theta1 (2.67-6.33)	Powers C3/A2 (mV^2) - Theta1 (2.67-6.33) Average power in all 3-s epochs in the indicated frequency range after excluding the highest 10% of values, which generally represent noise. Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	powers_c4a1_alpha Powers C4/A1 (æV^2) - Alpha (7.33-12.0)	Powers C4/A1 (æV^2) - Alpha (7.33-12.0) Average power in all 3-s epochs in the indicated frequency range after excluding the highest 10% of values, which generally represent noise. Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	powers_c4a1_beta1 Powers C4/A1 (æV^2) - Beta1 (14.3-20.0)	Powers C4/A1 (æV^2) - Beta1 (14.3-20.0) Average power in all 3-s epochs in the indicated frequency range after excluding the highest 10% of values, which generally represent noise. Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	powers_c4a1_beta2 Powers C4/A1 (æV^2) - Beta2 (20.3-35.0)	Powers C4/A1 (æV^2) - Beta2 (20.3-35.0) Average power in all 3-s epochs in the indicated frequency range after excluding the highest 10% of values, which generally represent noise. Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	powers_c4a1_delta Powers C4/A1 (æV^2) - Delta (0.33-2.33 Hz)	Powers C4/A1 (æV^2) - Delta (0.33-2.33 Hz) Average power in all 3-s epochs in the indicated frequency range after excluding the highest 10% of values, which generally represent noise. Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	powers_c4a1_gammaomega Powers C4/A1 (æV^2) - Gamma Omega (35.3-60.0)	Powers C4/A1 (æV^2) - Gamma Omega (35.3-60.0) Average power in all 3-s epochs in the indicated frequency range after excluding the highest 10% of values, which generally represent noise. Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	powers_c4a1_sigma Powers C4/A1 (æV^2) - Sigma (12.33-14.0)	Powers C4/A1 (æV^2) - Sigma (12.33-14.0) Average power in all 3-s epochs in the indicated frequency range after excluding the highest 10% of values, which generally represent noise. Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	powers_c4a1_theta1 Powers C4/A1 (æV^2) - Theta1 (2.67-6.33)	Powers C4/A1 (æV^2) - Theta1 (2.67-6.33) Average power in all 3-s epochs in the indicated frequency range after excluding the highest 10% of values, which generally represent noise. Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	spindle_char_n2_density_c3 Spindle Characteristics (Stage N2) - Density (C3)	Spindle Characteristics (Stage N2) - Density (C3) Spindle characteristics in stage N2. For detection methods and validation see Method A10: Goldschmied et al. 2021 (PubMed ID: 33165618), and Guadagni et al. 2021 (PubMed ID:32281182) Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	spindle_char_n2_density_c4 Spindle Characteristics (Stage N2) - Density (C4)	Spindle Characteristics (Stage N2) - Density (C4) Spindle characteristics in stage N2. For detection methods and validation see Method A10: Goldschmied et al. 2021 (PubMed ID: 33165618), and Guadagni et al. 2021 (PubMed ID:32281182) Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	spindle_char_n2_freq_c3 Spindle Characteristics (Stage N2) - Frequency (C3)	Spindle Characteristics (Stage N2) - Frequency (C3) Spindle characteristics in stage N2. For detection methods and validation see Method A10: Goldschmied et al. 2021 (PubMed ID: 33165618), and Guadagni et al. 2021 (PubMed ID:32281182) Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	spindle_char_n2_freq_c4 Spindle Characteristics (Stage N2) - Frequency (C4)	Spindle Characteristics (Stage N2) - Frequency (C4) Spindle characteristics in stage N2. For detection methods and validation see Method A10: Goldschmied et al. 2021 (PubMed ID: 33165618), and Guadagni et al. 2021 (PubMed ID:32281182) Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	spindle_char_n2_pctfast_c3 Spindle Characteristics (Stage N2) - % Fast (C3)	Spindle Characteristics (Stage N2) - % Fast (C3) Spindle characteristics in stage N2. For detection methods and validation see Method A10: Goldschmied et al. 2021 (PubMed ID: 33165618), and Guadagni et al. 2021 (PubMed ID:32281182) Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	spindle_char_n2_pctfast_c4 Spindle Characteristics (Stage N2) - % Fast (C4)	Spindle Characteristics (Stage N2) - % Fast (C4) Spindle characteristics in stage N2. For detection methods and validation see Method A10: Goldschmied et al. 2021 (PubMed ID: 33165618), and Guadagni et al. 2021 (PubMed ID:32281182) Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	spindle_char_n2_power_c3 Spindle Characteristics (Stage N2) - Power (C3)	Spindle Characteristics (Stage N2) - Power (C3) Spindle characteristics in stage N2. For detection methods and validation see Method A10: Goldschmied et al. 2021 (PubMed ID: 33165618), and Guadagni et al. 2021 (PubMed ID:32281182) Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	spindle_char_n2_power_c4 Spindle Characteristics (Stage N2) - Power (C4)	Spindle Characteristics (Stage N2) - Power (C4) Spindle characteristics in stage N2. For detection methods and validation see Method A10: Goldschmied et al. 2021 (PubMed ID: 33165618), and Guadagni et al. 2021 (PubMed ID:32281182) Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	sum_deciles_1and2 Sum Deciles 1 & 2	Sum Deciles 1 & 2 Used to determine Odds Ratio Product type, see orp_type Search for all EEG variables within this dataset	Sleep Monitoring/Polysomnography/Electroencephalogram
	valid_delta_and_intensity_count Arousal Characteristics - Valid Delta & Intensity Count	Arousal Characteristics - Valid Delta & Intensity Count	Sleep Monitoring/Polysomnography/Electroencephalogram
	valid_intensity_count Arousal Characteristics - Valid Intensity Count	Arousal Characteristics - Valid Intensity Count	Sleep Monitoring/Polysomnography/Electroencephalogram
	beer10 Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): bottles or cans of beer before bed	Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): bottles or cans of beer before bed How many bottles or cans of beer 4 hours before going to sleep last night? (number, up to 2 digits)	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS1
	cgrtts10 Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): cigarettes before bed	Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): cigarettes before bed How many cigarettes 4 hours before going to sleep last night? (number, up to 2 digits)	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS1
	cigars10 Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): cigars before bed	Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): cigars before bed How many cigars 4 hours before going to sleep last night? (number, up to 2 digits)	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS1
	coffee10 Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): cups of coffee before bed	Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): cups of coffee before bed How many cups of coffee (with caffeine) 4 hours before going to sleep last night? (number, up to 2 digits)	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS1
	date10 Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): Date completed	Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): Date completed Date questionnaire was completed (days from index date)	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS1
	diffa10 Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): difficulty falling asleep	Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): difficulty falling asleep Did you have difficulty falling asleep last night?	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS1
	hwlghr10 Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): How long slept (hours)	Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): How long slept (hours) How long did you sleep last night, Number of hours (number of hours, 0 to 24)	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS1
	hwlgmn10 Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): How long slept (minutes)	Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): How long slept (minutes) How long did you sleep last night, Number of minutes. (number of minutes, 0 to 59)	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS1
	hwwell10 Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): Quality of sleep compared to usual	Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): Quality of sleep compared to usual Compared to your usual night's sleep, how well did you sleep last night?	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS1
	ltdp10 Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): Quality of sleep light/deep	Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): Quality of sleep light/deep Quality of sleep last night: light/deep (1=light to 5=deep)	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS1
	meds10 Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): medications before bed	Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): medications before bed Did you take any meds that you didn't tell us about yesterday? 0=No, 1=Yes, 2=Unsure (enter med names, digitized using meds software)	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS1
	minfa10 Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): minutes to fall asleep	Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): minutes to fall asleep How many minutes did it take for you to fall asleep at bedtime last night? (number of minutes, up to 3 digits)	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS1
	pipe10 Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): pipe bowls before bed	Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): pipe bowls before bed How many pipe bowls 4 hours before going to sleep last night? (number, up to 2 digits)	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS1
	plstc10 Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): discomfort from plastic piece over lip	Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): discomfort from plastic piece over lip How much discomfort caused by these parts of the monitor: plastic piece over lip?	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS1
	rest10 Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): Quality of sleep: restless/restful	Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): Quality of sleep: restless/restful Quality of sleep: restless/restful (1=restless to 5=restful)	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS1
	shlg10 Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): Quality of sleep: short/long	Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): Quality of sleep: short/long Quality of sleep: short/long (1=short to 5=long)	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS1
	shots10 Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): mixed drinks before bed	Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): mixed drinks before bed How many mixed drinks or shots of liquor 4 hours before going to sleep last night? (number, up to 2 digits)	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS1
	soda10 Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): glasses or cans of soda before bed	Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): glasses or cans of soda before bed How many glasses or cans of soda (with caffeine) 4 hours before going to sleep last night? (number, up to 2 digits)	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS1
	tea10 Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): cups of tea before bed	Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): cups of tea before bed How many cups of tea (with caffeine) 4 hours before going to sleep last night? (number, up to 2 digits)	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS1
	vest10 Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): discomfort from vest	Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): discomfort from vest How much discomfort caused by these parts of the monitor: vest?	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS1
	wine10 Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): glasses of wine before bed	Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): glasses of wine before bed How many glasses of wine 4 hours before going to sleep last night? (number, up to 2 digits)	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS1
	wrface10 Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): discomfort from wires on face	Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): discomfort from wires on face How much discomfort caused by these parts of the monitor: wires on face?	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS1
	wrhead10 Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): discomfort from wires on head	Morning Survey (Sleep Heart Health Study Visit One (SHHS1)): discomfort from wires on head How much discomfort caused by these parts of the monitor: wires on your head?	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS1
	formdate_ms Morning Survey (Sleep Heart Health Study Visit Two (SHHS2)): Date completed	Morning Survey (Sleep Heart Health Study Visit Two (SHHS2)): Date completed Date of Morning Survey form	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS2
	ms204a Morning Survey (Sleep Heart Health Study Visit Two (SHHS2)): Quality of sleep light/deep	Morning Survey (Sleep Heart Health Study Visit Two (SHHS2)): Quality of sleep light/deep 4. Rate the actual quality of your sleep last night (Do not compare to usual sleep quality). My sleep last night was (circle a number for each): a. [5 point Likert scale from "Light" to "Dark"]	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS2
	ms204b Morning Survey (Sleep Heart Health Study Visit Two (SHHS2)): Quality of sleep: short/long	Morning Survey (Sleep Heart Health Study Visit Two (SHHS2)): Quality of sleep: short/long 4. Rate the actual quality of your sleep last night (Do not compare to usual sleep quality). My sleep last night was (circle a number for each): b. [5 point Likert scale from "Short" to "Long"]	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS2
	ms204c Morning Survey (Sleep Heart Health Study Visit Two (SHHS2)): Quality of sleep: restless/restful	Morning Survey (Sleep Heart Health Study Visit Two (SHHS2)): Quality of sleep: restless/restful 4. Rate the actual quality of your sleep last night (Do not compare to usual sleep quality). My sleep last night was (circle a number for each): c. [5 point Likert scale from "Restless" to "Restful"]	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS2
	ms205 Morning Survey (Sleep Heart Health Study Visit Two (SHHS2)): Quality of sleep compared to usual	Morning Survey (Sleep Heart Health Study Visit Two (SHHS2)): Quality of sleep compared to usual 5. Compared to your usual night's sleep, how well did you sleep last night? (check one)	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS2
	ms209a Morning Survey (Sleep Heart Health Study Visit Two (SHHS2)): glasses of wine before bed	Morning Survey (Sleep Heart Health Study Visit Two (SHHS2)): glasses of wine before bed 9. How many of the following drinks did you have during the 4 hours before you went to sleep last night? (Please write "0" if you did not drink any of that beverage.) a. ____ glasses of wine (4 oz.)	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS2
	ms209b Morning Survey (Sleep Heart Health Study Visit Two (SHHS2)): mixed drinks before bed	Morning Survey (Sleep Heart Health Study Visit Two (SHHS2)): mixed drinks before bed 9. How many of the following drinks did you have during the 4 hours before you went to sleep last night? (Please write "0" if you did not drink any of that beverage.) b. ____ drinks with hard liquor (1 shot)	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS2
	ms209c Morning Survey (Sleep Heart Health Study Visit Two (SHHS2)): bottles or cans of beer before bed	Morning Survey (Sleep Heart Health Study Visit Two (SHHS2)): bottles or cans of beer before bed 9. How many of the following drinks did you have during the 4 hours before you went to sleep last night? (Please write "0" if you did not drink any of that beverage.) c. ____ bottles or cans of beer (12 oz.)	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS2
	ms210a Morning Survey (Sleep Heart Health Study Visit Two (SHHS2)): cups of coffee before bed	Morning Survey (Sleep Heart Health Study Visit Two (SHHS2)): cups of coffee before bed 10. How many of the following drinks with caffeine did you have during the 4 hours before you went to sleep last night? (Please write "0" if you did not drink any of that beverage.) a. ____ cups of regular coffee (with caffeine)	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS2
	ms210b Morning Survey (Sleep Heart Health Study Visit Two (SHHS2)): cups of tea before bed	Morning Survey (Sleep Heart Health Study Visit Two (SHHS2)): cups of tea before bed 10. How many of the following drinks with caffeine did you have during the 4 hours before you went to sleep last night? (Please write "0" if you did not drink any of that beverage.) b. ____ cups of tea (with caffeine)	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS2
	ms210c Morning Survey (Sleep Heart Health Study Visit Two (SHHS2)): glasses or cans of soda before bed	Morning Survey (Sleep Heart Health Study Visit Two (SHHS2)): glasses or cans of soda before bed 10. How many of the following drinks with caffeine did you have during the 4 hours before you went to sleep last night? (Please write "0" if you did not drink any of that beverage.) c. ____ glasses or cans of cola or other soda (with caffeine)	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS2
	ms211a Morning Survey (Sleep Heart Health Study Visit Two (SHHS2)): cigarettes before bed	Morning Survey (Sleep Heart Health Study Visit Two (SHHS2)): cigarettes before bed 11. How much did you smoke during the 4 hours before you went to sleep last night? (Please write "0" for each that you did not smoke last night.) a. ____ number of cigarettes	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS2
	ms211b Morning Survey (Sleep Heart Health Study Visit Two (SHHS2)): pipe bowls before bed	Morning Survey (Sleep Heart Health Study Visit Two (SHHS2)): pipe bowls before bed 11. How much did you smoke during the 4 hours before you went to sleep last night? (Please write "0" for each that you did not smoke last night.) b. ____ number of pipe bowls	Sleep Monitoring/Polysomnography/Evening and Morning Survey/SHHS2