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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. Please refer to :slpa30: for the valid estimated sleep duration used to calculate this index.

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

slpa37 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in HCHS variables

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. Please refer to :slpa32: for the valid estimated sleep duration used to calculate this index.

Respiratory Event Index (Supine): (Apneas with no oxygen desaturation threshold used + hypopneas with > 50% flow reduction and no oxygen desaturation threshold used) / hours of artifact-free estimated sleep in supine position from type IV home sleep apnea test

slpa38 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in HCHS variables

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. Please refer to :slpa34: for the valid estimated sleep duration used to calculate this index.

Respiratory Event Index: (Apneas with >= 1% oxygen desaturation + hypopneas with > 50% flow reduction and >= 1% oxygen desaturation) / hours of artifact-free estimated sleep from type IV home sleep apnea test

slpa45 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in HCHS variables

Respiratory Event Index (Non-Supine): (Apneas with >= 1% oxygen desaturation + hypopneas with > 50% flow reduction and >= 1% oxygen desaturation) / hours of artifact-free estimated sleep in non-supine position from type IV home sleep apnea test

slpa46 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in HCHS variables

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. Please refer to :slpa32: for the valid estimated sleep duration used to calculate this index.

Respiratory Event Index (Supine): (Apneas with >= 1% oxygen desaturation + hypopneas with > 50% flow reduction and >= 1% oxygen desaturation) / hours of artifact-free estimated sleep in supine position from type IV home sleep apnea test

slpa47 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in HCHS variables

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. Please refer to :slpa34: for the valid estimated sleep duration used to calculate this index.