eeg_shhs - Search - Sleep Data - National Sleep Research Resource

Navigating the spectral slopes of the NSRR cohorts

Posted by shaunpurcell on November 8, 2021 in Data Notes

Nataliia Kozhemiako & Shaun Purcell We recently used NSRR data ...

Arousal Characteristics - Baseline HR

baseline_hr under Sleep Monitoring/Polysomnography/Electroencephalogram in SHHS variables

Heart rate in repsonse to arousals. Search for all EEG variables within this dataset

Arousal Characteristics - Delta HR

delta_hr under Sleep Monitoring/Polysomnography/Electroencephalogram in SHHS variables

Heart rate in repsonse to arousals. Search for all EEG variables within this dataset

Arousal Characteristics - dHR/ Intensity

dhr_intensity under Sleep Monitoring/Polysomnography/Electroencephalogram in SHHS variables

Heart rate in repsonse to arousals. Search for all EEG variables within this dataset

Sum Deciles 1 & 2

sum_deciles_1and2 under Sleep Monitoring/Polysomnography/Electroencephalogram in SHHS variables

Used to determine Odds Ratio Product type, see :orp_type: Search for all EEG variables within this dataset

Arousal Characteristics - Change in HR per hr of TRT

change_in_hr_perh_trt under Sleep Monitoring/Polysomnography/Electroencephalogram in SHHS variables

Heart rate in repsonse to arousals. Search for all EEG variables within this dataset

Arousal Characteristics - Intensity Scale

intensity_scale under Sleep Monitoring/Polysomnography/Electroencephalogram in SHHS variables

Arousal intensity on a scale from 1 to 9 (Younes 2017). Search for all EEG variables within this dataset

Clinical Category

clinical_category under Sleep Monitoring/Polysomnography/Electroencephalogram in SHHS variables

Clinical Category as per Younes et al. 2021 (PubMed ID: 34156473)Search for all EEG variables within this dataset

Avg ORP Last 120 min NREM

avg_orp_last120m_nrem under Sleep Monitoring/Polysomnography/Electroencephalogram in SHHS variables

Used (along with :min_orp_firsthalf_nrem:) to calculate :diff_orp:. Search for all EEG variables within this dataset

Min ORP First Half NREM

min_orp_firsthalf_nrem under Sleep Monitoring/Polysomnography/Electroencephalogram in SHHS variables

Used (along with :avg_orp_last120m_nrem:) to calculate :diff_orp:. Search for all EEG variables within this dataset

Breakdown of ICC components - MS Error

icc_ms_error under Sleep Monitoring/Polysomnography/Electroencephalogram in SHHS variables

Component of intraclass correlation, see :icc_rl_orp: for more information. Search for all EEG variables within this dataset

Breakdown of ICC components - MS Rows

icc_ms_rows under Sleep Monitoring/Polysomnography/Electroencephalogram in SHHS variables

Component of intraclass correlation, see :icc_rl_orp: for more information. Search for all EEG variables within this dataset

Average Normalized EEG Power

avg_normalized_eeg_power under Sleep Monitoring/Polysomnography/Electroencephalogram in SHHS variables

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

Breakdown of ICC components - MS Columns

icc_ms_cols under Sleep Monitoring/Polysomnography/Electroencephalogram in SHHS variables

Component of intraclass correlation, see :icc_rl_orp: for more information. Search for all EEG variables within this dataset

Alpha intrusion (% of 3-s epochs)

alpha_intrusion_pct_3sepochs under Sleep Monitoring/Polysomnography/Electroencephalogram in SHHS variables

Percent of 3-sec epochs with alpha power >30mV2 Younes et al. 2021 (PubMed ID: 34156473)Search for all EEG variables within this dataset

Powers C4/A1 (æV^2) - Theta1 (2.67-6.33)

powers_c4a1_theta1 under Sleep Monitoring/Polysomnography/Electroencephalogram in SHHS variables

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

Average ORP Over Total Recording Time

avg_org_trt under Sleep Monitoring/Polysomnography/Electroencephalogram in SHHS variables

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

Average ORP During Wake

avg_orp_wake under Sleep Monitoring/Polysomnography/Electroencephalogram in SHHS variables

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

Spindle Characteristics (Stage N2) - Density (C3)

spindle_char_n2_density_c3 under Sleep Monitoring/Polysomnography/Electroencephalogram in SHHS variables

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

Spindle Characteristics (Stage N2) - Density (C4)

spindle_char_n2_density_c4 under Sleep Monitoring/Polysomnography/Electroencephalogram in SHHS variables

Powers C3/A2 (mV^2) - Theta1 (2.67-6.33)

powers_c3a2_theta1 under Sleep Monitoring/Polysomnography/Electroencephalogram in SHHS variables

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

Powers C4/A1 (æV^2) - Delta (0.33-2.33 Hz)

powers_c4a1_delta under Sleep Monitoring/Polysomnography/Electroencephalogram in SHHS variables

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

Spindle Characteristics (Stage N2) - Frequency (C3)

spindle_char_n2_freq_c3 under Sleep Monitoring/Polysomnography/Electroencephalogram in SHHS variables

Spindle Characteristics (Stage N2) - Frequency (C4)

spindle_char_n2_freq_c4 under Sleep Monitoring/Polysomnography/Electroencephalogram in SHHS variables

Spindle Characteristics (Stage N2) - % Fast (C3)

spindle_char_n2_pctfast_c3 under Sleep Monitoring/Polysomnography/Electroencephalogram in SHHS variables