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Average sleep duration per nap on workdays from actigraphy

sawa214 under Sleep Monitoring/Actigraphy in HCHS variables

Sleep duration is the interval between sleep onset and sleep offset time while asleep.

Average sleep duration per nap of any sleep recorded on workdays from actigraphy

sawa215 under Sleep Monitoring/Actigraphy in HCHS variables

Sleep duration is the interval between sleep onset and sleep offset time while asleep.

Average sleep duration per nap of at least 15 minutes in length on workdays from actigraphy

sawa216 under Sleep Monitoring/Actigraphy in HCHS variables

Sleep duration is the interval between sleep onset and sleep offset time while asleep.

Average daily total sleep duration in main sleep and naps combined on non-workdays from actigraphy

sawa236 under Sleep Monitoring/Actigraphy in HCHS variables

Sleep duration is the interval between sleep onset and sleep offset time while asleep.

Standard deviation of daily total sleep duration in main sleep and naps combined on non-workdays from actigraphy

sawa237 under Sleep Monitoring/Actigraphy in HCHS variables

Sleep duration is the interval between sleep onset and sleep offset time while asleep.

Average daily total sleep duration in main sleep on non-workdays from actigraphy

sawa242 under Sleep Monitoring/Actigraphy in HCHS variables

Sleep duration is the interval between sleep onset and sleep offset time while asleep.

Standard deviation of daily total sleep duration in main sleep on non-workdays from actigraphy

sawa243 under Sleep Monitoring/Actigraphy in HCHS variables

Sleep duration is the interval between sleep onset and sleep offset time while asleep.

Average daily sleep duration in 24 hours (including main rest intervals and naps) over all reliable days from actigraphy

sawa283 under Sleep Monitoring/Actigraphy in HCHS variables

Sleep duration (i.e. total sleep time) is the interval between sleep onset and sleep offset time while asleep.

Standard deviation of the daily total sleep duration in 24 hours (including main rest intervals and naps) over all reliable days from actigraphy

sawa284 under Sleep Monitoring/Actigraphy in HCHS variables

Sleep duration (i.e. total sleep time) is the interval between sleep onset and sleep offset time while asleep.

Average daily sleep duration in main sleep over all reliable days from actigraphy

sawa289 under Sleep Monitoring/Actigraphy in HCHS variables

Sleep duration (i.e. total sleep time) is the interval between sleep onset and sleep offset time while asleep.

Standard deviation of the daily sleep duration in main sleep over all reliable days from actigraphy

sawa290 under Sleep Monitoring/Actigraphy in HCHS variables

Sleep duration (i.e. total sleep time) is the interval between sleep onset and sleep offset time while asleep.

Average daily total sleep duration in main sleep across all days from actigraphy

sawa45 under Sleep Monitoring/Actigraphy in HCHS variables

Sleep duration (i.e. total sleep time) is the interval between sleep onset and sleep offset time while asleep.This variable is similar to the calculated variable sawa54; however, sawa45 is calculated based on data generated by Actiware software before data cleaning and imputation.

Average daily total sleep duration in main sleep and naps combined across all days from actigraphy

sawa48 under Sleep Monitoring/Actigraphy in HCHS variables

Sleep duration (i.e. total sleep time) is the interval between sleep onset and sleep offset time while asleep.

Average daily total sleep duration in main sleep across all days from actigraphy

sawa54 under Sleep Monitoring/Actigraphy in HCHS variables

Sleep duration (i.e. total sleep time) is the interval between sleep onset and sleep offset time while asleep.This variable is similar to variable sawa45; however, sawa45 is calculated based on data generated by Actiware software before data cleaning and imputation.

Standard deviation of daily total sleep duration in main sleep across all days from actigraphy

sawa55 under Sleep Monitoring/Actigraphy in HCHS variables

Sleep duration (i.e. total sleep time) is the interval between sleep onset and sleep offset time while asleep.

Average daily sleep duration in naps over all days from actigraphy

sawa76 under Sleep Monitoring/Actigraphy in HCHS variables

Sleep duration (i.e. total sleep time) is the interval between sleep onset and sleep offset time while asleep.

Average daily sleep duration in naps of at least 15 minutes in length over all days from actigraphy

sawa77 under Sleep Monitoring/Actigraphy in HCHS variables

Sleep duration (i.e. total sleep time) is the interval between sleep onset and sleep offset time while asleep.

Average daily total sleep duration in main sleep and naps combined on weekdays from actigraphy

sawa95 under Sleep Monitoring/Actigraphy in HCHS variables

Sleep duration (i.e. total sleep time) is the interval between sleep onset and sleep offset time while asleep.

Standard deviation of daily total sleep duration in 24 hours (including main rest intervals and naps) on weekdays from actigraphy

sawa96 under Sleep Monitoring/Actigraphy in HCHS variables

Sleep duration (i.e. total sleep time) is the interval between sleep onset and sleep offset time while asleep.

Total Number of Apnea and Hypopnea: Apneas with no oxygen desaturation threshold used + hypopneas with > 50% flow reduction and no oxygen desaturation threshold used during artifact-free estimated sleep from type IV home sleep apnea test

slpa39 under Sleep Monitoring/Polysomnography/Respiratory Event Counts in HCHS variables

Apnea and hypopnea events were not distinguished as separate event types during scoring. Both were classified as a respiratory event that required a 50% reduction in Nasal Flow signal for at least 10 seconds.Estimated sleep duration, providing an approximation of total sleep duration (i.e. total sleep time) inferred from analysis of non-EEG channels Zhao et al., 2017 (PMID:27707441) Any continuous periods of >=20 min with loss of respiratory channel was marked as wake and not included in the estimates.

Total Number of Apneas and Hypopneas (Non-Supine): Apneas with no oxygen desaturation threshold used + hypopneas with > 50% flow reduction and no oxygen desaturation threshold used during artifact-free estimated sleep in non-supine position from type IV home sleep apnea test

slpa40 under Sleep Monitoring/Polysomnography/Respiratory Event Counts in HCHS variables

Apnea and hypopnea events were not distinguished as separate event types during scoring. Both were classified as a respiratory event that required a 50% reduction in Nasal Flow signal for at least 10 seconds.Estimated sleep duration, providing an approximation of total sleep duration (i.e. total sleep time) inferred from analysis of non-EEG channels Zhao et al., 2017 (PMID:27707441) Any continuous periods of >=20 min with loss of respiratory channel was marked as wake and not included in the estimates.

Total Number of Apneas and Hypopneas (Supine): Apneas with no oxygen desaturation threshold used + hypopneas with > 50% flow reduction and no oxygen desaturation threshold used during artifact-free estimated sleep in supine position from type IV home sleep apnea test

slpa41 under Sleep Monitoring/Polysomnography/Respiratory Event Counts in HCHS variables

Apnea and hypopnea events were not distinguished as separate event types during scoring. Both were classified as a respiratory event that required a 50% reduction in Nasal Flow signal for at least 10 seconds.Estimated sleep duration, providing an approximation of total sleep duration (i.e. total sleep time) inferred from analysis of non-EEG channels Zhao et al., 2017 (PMID:27707441) Any continuous periods of >=20 min with loss of respiratory channel was marked as wake and not included in the estimates.

Total Number of Apneas and Hypopneas: Apneas with >= 1% oxygen desaturation + hypopneas with > 50% flow reduction and >= 1% oxygen desaturation during artifact-free estimated sleep from type IV home sleep apnea test

slpa48 under Sleep Monitoring/Polysomnography/Respiratory Event Counts in HCHS variables

Apnea and hypopnea events were not distinguished as separate event types during scoring. Both were classified as a respiratory event that required a 50% reduction in Nasal Flow signal for at least 10 seconds.Estimated sleep duration, providing an approximation of total sleep duration (i.e. total sleep time) inferred from analysis of non-EEG channels Zhao et al., 2017 (PMID:27707441) Any continuous periods of >=20 min with loss of respiratory channel was marked as wake and not included in the estimates.

Total Number of Apneas and Hypopneas (Non-Supine): Apneas with >= 1% oxygen desaturation + hypopneas with > 50% flow reduction and >= 1% oxygen desaturation during artifact-free estimated sleep in non-supine position from type IV home sleep apnea test

slpa49 under Sleep Monitoring/Polysomnography/Respiratory Event Counts in HCHS variables

Apnea and hypopnea events were not distinguished as separate event types during scoring. Both were classified as a respiratory event that required a 50% reduction in Nasal Flow signal for at least 10 seconds.Estimated sleep duration, providing an approximation of total sleep duration (i.e. total sleep time) inferred from analysis of non-EEG channels Zhao et al., 2017 (PMID:27707441) Any continuous periods of >=20 min with loss of respiratory channel was marked as wake and not included in the estimates.

Total Number of Apneas and Hypopneas (Supine): Apneas with >= 1% oxygen desaturation + hypopneas with > 50% flow reduction and >= 1% oxygen desaturation during artifact-free estimated sleep in supine position from type IV home sleep apnea test

slpa50 under Sleep Monitoring/Polysomnography/Respiratory Event Counts in HCHS variables

Apnea and hypopnea events were not distinguished as separate event types during scoring. Both were classified as a respiratory event that required a 50% reduction in Nasal Flow signal for at least 10 seconds.Estimated sleep duration, providing an approximation of total sleep duration (i.e. total sleep time) inferred from analysis of non-EEG channels Zhao et al., 2017 (PMID:27707441) Any continuous periods of >=20 min with loss of respiratory channel was marked as wake and not included in the estimates.