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Left Ankle Branchial Index (occ. failure incl.)
left_abi under Clinical Data/Vital Signs/Seated Blood Pressure in HCHS variables
Ankle Brachial Index (ABI) is the average ankle to arm systolic pressures as measured from the left and right sides. The higher of the two ankle measures on the same side is divided by the higher of the two systolic arm pressures to derive the right and left side ABI values.
Right Ankle Branchial Index (occ. failure incl.)
right_abi under Clinical Data/Vital Signs/Seated Blood Pressure in HCHS variables
Ankle Brachial Index (ABI) is the average ankle to arm systolic pressures as measured from the left and right sides. The higher of the two ankle measures on the same side is divided by the higher of the two systolic arm pressures to derive the right and left side ABI values.
Respiratory Event Index: (Apneas with no oxygen desaturation threshold used + hypopneas with > 50% flow reduction and no oxygen desaturation threshold used) / hours of artifact-free estimated sleep from type IV home sleep apnea test
slpa36 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 :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
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 >= 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.
Respiratory Event Index: (Apneas with >= 3% oxygen desaturation + hypopneas with > 50% flow reduction and >= 3% oxygen desaturation) / hours of artifact-free estimated sleep from type IV home sleep apnea test
slpa54 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 :slpa30: for the valid estimated sleep duration used to calculate this index.
Respiratory Event Index (Non-Supine): (Apneas with >= 3% oxygen desaturation + hypopneas with > 50% flow reduction and >= 3% oxygen desaturation) / hours of artifact-free estimated sleep in non-supine position from type IV home sleep apnea test
slpa55 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 >= 3% oxygen desaturation + hypopneas with > 50% flow reduction and >= 3% oxygen desaturation) / hours of artifact-free estimated sleep in supine position from type IV home sleep apnea test
slpa56 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 >= 4% oxygen desaturation + hypopneas with > 50% flow reduction and >= 4% oxygen desaturation) / hours of artifact-free estimated sleep from type IV home sleep apnea test
slpa63 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 :slpa30: for the valid estimated sleep duration used to calculate this index.
Respiratory Event Index (Non-Supine): (Apneas with >= 4% oxygen desaturation + hypopneas with > 50% flow reduction and >= 4% oxygen desaturation) / hours of artifact-free estimated sleep in non-supine position from type IV home sleep apnea test
slpa64 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 >= 4% oxygen desaturation + hypopneas with > 50% flow reduction and >= 4% oxygen desaturation) / hours of artifact-free estimated sleep in supine position from type IV home sleep apnea test
slpa65 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.
Insomnia Severity Index: Total Score
isi under Sleep Questionnaires/Sleep Disturbance in HCHS variables
Summary score for the Insomnia Severity Index. Morin CM, Insomnia, psychological assessment and management. Guilford Press, New York, 1993 Each item is scored from 0 to 4. Total score is the sum of all seven items (0 to 28), and catergorized as: absence of insomnia (0 to 7), sub-threshold insomnia (8 to 14), moderate insomnia (15 to 21), and severe insomnia (22 to 28). This is a numeric variable with values ranging from 0-28 based on the Sleep Questionnaire II form. Missing if did not answer any of following: SQEA6, SQEA7, SQEA8, SQEA9. If SQEA10 answered 'Yes 1', but any of following missing: SQEA11, SQEA12, SQEA13, then missing. Missing if did not answer SQEA10 and SQEA11-SQEA13.Search for all ISI variables within this dataset
Polysomnography (PSG) Quality Assessment: Respiratory Disturbance Index (RDI)=0 real
rdi0ou under Sleep Monitoring/Polysomnography/Signal Quality in SOF variables
If Respiratory Disturbance Index (RDI) = 0, scorer has verified that this value is real.
Body mass index (BMI) (Sleep Heart Health Study Visit One (SHHS1))
bmi_s1 under Anthropometry in SHHS variables
Body Mass Index (BMI) at Sleep Heart Health Study Visit One (SHHS1)
Body mass index (BMI) (Sleep Heart Health Study Visit Two (SHHS2))
bmi_s2 under Anthropometry in SHHS variables
Body Mass Index (BMI) at Sleep Heart Health Study Visit Two (SHHS2)
Physical Measurements (Sleep Heart Health Study Visit Two (SHHS2)): Max inflation level Ankle-arm Blood Pressure Index (AAI BP)
pm226b under Clinical Data/Vital Signs/Seated Blood Pressure/SHHS2 in SHHS variables
Ankle-arm Blood Pressure Index (AAI) Doppler Obliteration Pressure b. Max inflation level: (palpated +30)
Site of Arm (Ankle Arm Blood Pressure Index-AAI) Measurement (Sleep Heart Health Study Visit Two (SHHS2))
pm227 under Clinical Data/Vital Signs/Seated Blood Pressure/SHHS2 in SHHS variables
Arm blood pressure (BP) site for Ankle Arm Blood Pressure Index (AAI):
Polysomnography (PSG) Quality Assessment: Medical Alert - Apnea-Hypopnea Index (AHI) > 50
ahiov50 under Sleep Monitoring/Polysomnography/Administrative in SHHS variables
Medical Alert for Apnea-Hypopnea Index (AHI) over 50.
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Respiratory Disturbance Index (RDI)=0 real
rdi0ou under Sleep Monitoring/Polysomnography/Signal Quality/SHHS2 in SHHS variables
If Respiratory Disturbance Index (RDI) = 0, scorer has verified that this value is real.
The Short Sleep Apnea Quality of Life Index (SAQLI) Score
saqli under Sleep Questionnaires/Sleep Disordered Breathing in SHHS variables
The Short Sleep Apnea Quality of Life Index (Short SAQLI) score
Body Mass Index (BMI) percentile (from the Centers for Disease Control and Prevention (CDC)) for age, gender
bmipct under Anthropometry in CCSHS variables
Age- and gender-specific Body Mass Index (BMI) percentile based on the Centers for Disease Control and Prevention (CDC) norms
Body Mass Index (BMI) z-score (from the Centers for Disease Control and Prevention (CDC)) for age, gender
bmiz under Anthropometry in CCSHS variables
Age- and gender-specific Body Mass Index (BMI) z-score based on the Centers for Disease Control and Prevention (CDC) norms
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