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Sleep Heart Health Study

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  1. shhs
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  4. Administrative Anthropometry Blood Pressure Bloods ECG Lung Function Polysomnography
Name Label Folder
bmi_s1
Body mass index (BMI) (Sleep Heart Health Study Visit One (SHHS1))
Body mass index (BMI) (Sleep Heart Health Study Visit One (SHHS1))

Body Mass Index (BMI) at Sleep Heart Health Study Visit One (SHHS1)

 		Measurements/Anthropometry
bmi_s2
Body mass index (BMI) (Sleep Heart Health Study Visit Two (SHHS2))
Body mass index (BMI) (Sleep Heart Health Study Visit Two (SHHS2))

Body Mass Index (BMI) at Sleep Heart Health Study Visit Two (SHHS2)

 		Measurements/Anthropometry
height
Height (Sleep Heart Health Study Visit One (SHHS1))
Height (Sleep Heart Health Study Visit One (SHHS1))

The SHHS Coordinating Center bottom and top coded this variable using a lower limit of 145 centimeters and an upper limit of 188 centimeters.

 		Measurements/Anthropometry
hip
Hip Circumference (Sleep Heart Health Study Visit One (SHHS1))
Hip Circumference (Sleep Heart Health Study Visit One (SHHS1))

Hip measurement in centimeters

 		Measurements/Anthropometry
pm202
Weight (Sleep Heart Health Study Visit Two (SHHS2))
Weight (Sleep Heart Health Study Visit Two (SHHS2))

The SHHS Coordinating Center bottom and top coded this variable using a lower limit of 47 kilograms and an upper limit of 126 kilograms.

 		Measurements/Anthropometry
pm207
Height (Sleep Heart Health Study Visit Two (SHHS2))
Height (Sleep Heart Health Study Visit Two (SHHS2))

The SHHS Coordinating Center bottom and top coded this variable using a lower limit of 145 centimeters and an upper limit of 188 centimeters.

 		Measurements/Anthropometry
waist
Waist Circumference (Sleep Heart Health Study Visit One (SHHS1))
Waist Circumference (Sleep Heart Health Study Visit One (SHHS1))

Waist measurement in centimeters

 		Measurements/Anthropometry
weight
Weight (Sleep Heart Health Study Visit One (SHHS1))
Weight (Sleep Heart Health Study Visit One (SHHS1))

The SHHS Coordinating Center bottom and top coded this variable using a lower limit of 47 kilograms and an upper limit of 126 kilograms.

 		Measurements/Anthropometry
avg23bpd_s2
Average Diastolic blood pressure (BP) (Sleep Heart Health Study Visit Two (SHHS2))
Average Diastolic blood pressure (BP) (Sleep Heart Health Study Visit Two (SHHS2))

Average of 2nd and 3rd Diastolic Blood Pressure (BP) measures

 		Measurements/Blood Pressure
avg23bps_s2
Average Systolic blood pressure (BP) (Sleep Heart Health Study Visit Two (SHHS2))
Average Systolic blood pressure (BP) (Sleep Heart Health Study Visit Two (SHHS2))

Average of 2nd and 3rd Systolic Blood Pressure (BP) measures

 		Measurements/Blood Pressure
diasbp
Average Diastolic blood pressure (BP) (Sleep Heart Health Study Visit One (SHHS1))
Average Diastolic blood pressure (BP) (Sleep Heart Health Study Visit One (SHHS1))

Seated Diastolic Blood Pressure (BP)

 		Measurements/Blood Pressure
systbp
Average Systolic blood pressure (BP) (Sleep Heart Health Study Visit One (SHHS1))
Average Systolic blood pressure (BP) (Sleep Heart Health Study Visit One (SHHS1))

Seated Systolic Blood Pressure (BP) (Average of two measurements)

 		Measurements/Blood Pressure
chol
Cholesterol
Cholesterol Measurements/Bloods
hdl
High-density lipoprotein (HDL) cholesterol
High-density lipoprotein (HDL) cholesterol Measurements/Bloods
trig
Triglycerides
Triglycerides Measurements/Bloods
fev1
Forced Expiratory Volume (FEV 1) (Sleep Heart Health Study Visit One (SHHS1))
Forced Expiratory Volume (FEV 1) (Sleep Heart Health Study Visit One (SHHS1))

in One Second

 		Measurements/Lung Function
fvc
Forced Vital Capacity (FVC) (Sleep Heart Health Study Visit One (SHHS1))
Forced Vital Capacity (FVC) (Sleep Heart Health Study Visit One (SHHS1)) Measurements/Lung Function
ai_all
Arousal Index
Arousal Index

Total number of arousals per hour of sleep. Ratio of count of arousals to total sleep time in hours.

 		Measurements/Polysomnography/Arousals
avgsat
Average oxygen saturation (SaO2) in sleep
Average oxygen saturation (SaO2) in sleep Measurements/Polysomnography/Oxygen Saturation
minsat
Minimum oxygen saturation (SaO2) in sleep
Minimum oxygen saturation (SaO2) in sleep

Lowest oxygen saturation (SaO2)% during sleep

 		Measurements/Polysomnography/Oxygen Saturation
ahi_a0h3
Apnea-Hypopnea Index (AHI) >= 3% - number of [all apneas] and [hypopneas with >= 3% oxygen desaturation] per hour of sleep
Apnea-Hypopnea Index (AHI) >= 3% - number of [all apneas] and [hypopneas with >= 3% oxygen desaturation] per hour of sleep Measurements/Polysomnography/Respiratory Events/Indexes
ahi_a0h3a
Apnea-Hypopnea Index (AHI) >= 3% - number of [all apneas] and [hypopneas with >= 3% oxygen desaturation or arousal] per hour of sleep
Apnea-Hypopnea Index (AHI) >= 3% - number of [all apneas] and [hypopneas with >= 3% oxygen desaturation or arousal] per hour of sleep Measurements/Polysomnography/Respiratory Events/Indexes
ahi_a0h4
Apnea-Hypopnea Index (AHI) >= 4% - number of [all apneas] and [hypopneas with >= 4% oxygen desaturation] per hour of sleep
Apnea-Hypopnea Index (AHI) >= 4% - number of [all apneas] and [hypopneas with >= 4% oxygen desaturation] per hour of sleep Measurements/Polysomnography/Respiratory Events/Indexes
ahi_a0h4a
Apnea-Hypopnea Index (AHI) >= 4% - number of [all apneas] and [hypopneas with >= 4% oxygen desaturation or arousal] per hour of sleep
Apnea-Hypopnea Index (AHI) >= 4% - number of [all apneas] and [hypopneas with >= 4% oxygen desaturation or arousal] per hour of sleep Measurements/Polysomnography/Respiratory Events/Indexes
ahi_c0h3
Central Apnea-Hypopnea Index (AHI) >= 3% - number of [central apneas] and [hypopneas with >= 3% oxygen desaturation] per hour of sleep
Central Apnea-Hypopnea Index (AHI) >= 3% - number of [central apneas] and [hypopneas with >= 3% oxygen desaturation] per hour of sleep Measurements/Polysomnography/Respiratory Events/Indexes
ahi_c0h3a
Central Apnea-Hypopnea Index (AHI) >= 3% - number of [central apneas] and [hypopneas with >= 3% oxygen desaturation or arousal] per hour of sleep
Central Apnea-Hypopnea Index (AHI) >= 3% - number of [central apneas] and [hypopneas with >= 3% oxygen desaturation or arousal] per hour of sleep Measurements/Polysomnography/Respiratory Events/Indexes
ahi_c0h4
Central Apnea-Hypopnea Index (AHI) >= 4% - number of [central apneas] and [hypopneas with >= 4% oxygen desaturation] per hour of sleep
Central Apnea-Hypopnea Index (AHI) >= 4% - number of [central apneas] and [hypopneas with >= 4% oxygen desaturation] per hour of sleep Measurements/Polysomnography/Respiratory Events/Indexes
ahi_c0h4a
Central Apnea-Hypopnea Index (AHI) >= 4% - number of [central apneas] and [hypopneas with >= 4% oxygen desaturation or arousal] per hour of sleep
Central Apnea-Hypopnea Index (AHI) >= 4% - number of [central apneas] and [hypopneas with >= 4% oxygen desaturation or arousal] per hour of sleep Measurements/Polysomnography/Respiratory Events/Indexes
ahi_o0h3
Obstructive Apnea-Hypopnea Index (AHI) >= 3% - number of [obstructive apneas] and [hypopneas with >= 3% oxygen desaturation] per hour of sleep
Obstructive Apnea-Hypopnea Index (AHI) >= 3% - number of [obstructive apneas] and [hypopneas with >= 3% oxygen desaturation] per hour of sleep Measurements/Polysomnography/Respiratory Events/Indexes
ahi_o0h3a
Obstructive Apnea-Hypopnea Index (AHI) >= 3% - number of [obstructive apneas] and [hypopneas with >= 3% oxygen desaturation or arousal] per hour of sleep
Obstructive Apnea-Hypopnea Index (AHI) >= 3% - number of [obstructive apneas] and [hypopneas with >= 3% oxygen desaturation or arousal] per hour of sleep Measurements/Polysomnography/Respiratory Events/Indexes
ahi_o0h4
Obstructive Apnea-Hypopnea Index (AHI) >= 4% - number of [obstructive apneas] and [hypopneas with >= 4% oxygen desaturation] per hour of sleep
Obstructive Apnea-Hypopnea Index (AHI) >= 4% - number of [obstructive apneas] and [hypopneas with >= 4% oxygen desaturation] per hour of sleep Measurements/Polysomnography/Respiratory Events/Indexes
ahi_o0h4a
Obstructive Apnea-Hypopnea Index (AHI) >= 4% - number of [obstructive apneas] and [hypopneas with >= 4% oxygen desaturation or arousal] per hour of sleep
Obstructive Apnea-Hypopnea Index (AHI) >= 4% - number of [obstructive apneas] and [hypopneas with >= 4% oxygen desaturation or arousal] per hour of sleep Measurements/Polysomnography/Respiratory Events/Indexes
cai0p
Central Apnea Index - numer of [central apneas] per hour of sleep
Central Apnea Index - numer of [central apneas] per hour of sleep Measurements/Polysomnography/Respiratory Events/Indexes
oahi
Obstructive Apnea-Hypopnea Index (OAHI) at >=4% oxygen desaturation
Obstructive Apnea-Hypopnea Index (OAHI) at >=4% oxygen desaturation

Obstructive apnea (all desaturations) hypopnea (>=4% desaturation) index

 		Measurements/Polysomnography/Respiratory Events/Indexes
oai0p
Obstructive Apnea Index - number of [obstructive apneas] per hour of sleep
Obstructive Apnea Index - number of [obstructive apneas] per hour of sleep Measurements/Polysomnography/Respiratory Events/Indexes
rdi0p
Overall Respiratory Disturbance Index (RDI) all oxygen desaturations
Overall Respiratory Disturbance Index (RDI) all oxygen desaturations Measurements/Polysomnography/Respiratory Events/Indexes
rdi3p
Overall Respiratory Disturbance Index (RDI) at >=3% oxygen desaturation
Overall Respiratory Disturbance Index (RDI) at >=3% oxygen desaturation Measurements/Polysomnography/Respiratory Events/Indexes
rdi3pa
Overall Respiratory Disturbance Index (RDI) at >=3% oxygen desaturation or arousal
Overall Respiratory Disturbance Index (RDI) at >=3% oxygen desaturation or arousal Measurements/Polysomnography/Respiratory Events/Indexes
rdi4p
Overall Respiratory Disturbance Index (RDI) at >=4% oxygen desaturation
Overall Respiratory Disturbance Index (RDI) at >=4% oxygen desaturation

Ratio of the count of all apneas (central and obstructive) and hypopneas associated with at least a >=4% oxygen desaturation to the total sleep time expressed in hours

 		Measurements/Polysomnography/Respiratory Events/Indexes
rdinr3p
Overall Respiratory Disturbance Index (RDI) (Non-rapid eye movement sleep (NREM)) at >=3% oxygen desaturation
Overall Respiratory Disturbance Index (RDI) (Non-rapid eye movement sleep (NREM)) at >=3% oxygen desaturation Measurements/Polysomnography/Respiratory Events/Indexes
rdirem3p
Overall Respiratory Disturbance Index (RDI) (Rapid eye movement sleep (REM)) at >=3% oxygen desaturation
Overall Respiratory Disturbance Index (RDI) (Rapid eye movement sleep (REM)) at >=3% oxygen desaturation Measurements/Polysomnography/Respiratory Events/Indexes
overall_shhs2
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Overall signal quality
Polysomnography (PSG) Quality Assessment (Sleep Heart Health Study Visit Two (SHHS2)): Overall signal quality

Overall study grade as assigned by scorer. These codes reflected the total duration of useable (artifact free, scorable) signals during sleep time across channels, weighing those signals most critical for accurate scoring of respiratory events and staging during sleep time. The Quality Assessment Form for SHHS2 was modified so that the overall quality grade and the signal quality codes were based on signals during sleep time. Since events were only scored during sleep time this provided a more accurate assessment of signal quality during the actual time or scoring. This change would only have affected the quality grade of a small number of studies in SHHS1 where there was a significant amount of time awake with very good signals combined with very poor signals that occurred during sleep. The overall and signal quality grades are comparable between SHHS1 and SHHS2.

 		Measurements/Polysomnography/Signal Quality/SHHS2
nsupinep
Percent Time non-supine
Percent Time non-supine

Percent of sleep time in non-supine body position

 		Measurements/Polysomnography/Sleep Architecture
pctlt75
Percent of sleep time with less than 75% oxygen saturation (SaO2)
Percent of sleep time with less than 75% oxygen saturation (SaO2) Measurements/Polysomnography/Sleep Architecture
pctlt80
Percent of sleep time with less than 80% oxygen saturation (SaO2)
Percent of sleep time with less than 80% oxygen saturation (SaO2) Measurements/Polysomnography/Sleep Architecture
pctlt85
Percent of sleep time with less than 85% oxygen saturation (SaO2)
Percent of sleep time with less than 85% oxygen saturation (SaO2) Measurements/Polysomnography/Sleep Architecture
pctlt90
Percent of sleep time with less than 90% oxygen saturation (SaO2)
Percent of sleep time with less than 90% oxygen saturation (SaO2)

Ratio of the number of minutes with oxygen saturation (SaO2) under 90% to the total sleep time expressed in hours.

 		Measurements/Polysomnography/Sleep Architecture
slp_eff
Sleep Efficiency
Sleep Efficiency

Percentage of time in bed that was spent sleeping, or the ratio of total sleep time to total time in bed, expressed as a percentage.

 		Measurements/Polysomnography/Sleep Architecture
slp_lat
Sleep latency
Sleep latency

Time from lights out time to beginning of sleep, rounded to nearest minute

 		Measurements/Polysomnography/Sleep Architecture
slpprdp
Sleep Time
Sleep Time Measurements/Polysomnography/Sleep Architecture
slptime
Total Sleep Time
Total Sleep Time Measurements/Polysomnography/Sleep Architecture
supinep
Percent Time supine
Percent Time supine Measurements/Polysomnography/Sleep Architecture
times34p
Percent Time in Stage 3/4
Percent Time in Stage 3/4 Measurements/Polysomnography/Sleep Architecture
timest1p
Percent Time in Stage 1
Percent Time in Stage 1 Measurements/Polysomnography/Sleep Architecture
timest2p
Percent Time in Stage 2
Percent Time in Stage 2 Measurements/Polysomnography/Sleep Architecture
waso
Wake After Sleep Onset
Wake After Sleep Onset

Total amount of time spent awake after going to sleep

 		Measurements/Polysomnography/Sleep Architecture
pm211
Physical Measurements (Sleep Heart Health Study Visit Two (SHHS2)): Neck circumference within window
Physical Measurements (Sleep Heart Health Study Visit Two (SHHS2)): Neck circumference within window

11.Neck circumference measurement within the data collection window?

 		Measurements/Administrative
neck20
Neck Circumference (Sleep Heart Health Study Visit One (SHHS1))
Neck Circumference (Sleep Heart Health Study Visit One (SHHS1))

Neck circumference in centimeters

 		Measurements/Anthropometry
pm212a
Neck circumference (measurement 1) (Sleep Heart Health Study Visit Two (SHHS2))
Neck circumference (measurement 1) (Sleep Heart Health Study Visit Two (SHHS2))

12. Neck circumference (Round up to nearest 1/2 cm, i.e, measurement should end with .0 or .5) a. First reading:

 		Measurements/Anthropometry
pm212b
Neck circumference (measurement 2) (Sleep Heart Health Study Visit Two (SHHS2))
Neck circumference (measurement 2) (Sleep Heart Health Study Visit Two (SHHS2))

12. Neck circumference (Round up to nearest 1/2 cm, i.e, measurement should end with .0 or .5) b. Second reading:

 		Measurements/Anthropometry
pm212c
Neck circumference (measurement 3) (Sleep Heart Health Study Visit Two (SHHS2))
Neck circumference (measurement 3) (Sleep Heart Health Study Visit Two (SHHS2))

12. Neck circumference (Round up to nearest 1/2 cm, i.e, measurement should end with .0 or .5) c. Third reading:

 		Measurements/Anthropometry
weight20
Weight at Blood Pressure (BP) measurement (Sleep Heart Health Study Visit One (SHHS1))
Weight at Blood Pressure (BP) measurement (Sleep Heart Health Study Visit One (SHHS1))

The SHHS Coordinating Center bottom and top coded this variable using a lower limit of 47 kilograms and an upper limit of 126 kilograms.

 		Measurements/Anthropometry
aai
Ankle-arm Blood Pressure (BP) Index (Sleep Heart Health Study Visit One (SHHS1))
Ankle-arm Blood Pressure (BP) Index (Sleep Heart Health Study Visit One (SHHS1))

Ratio of ankle to arm systolic blood pressure (BP)

 		Measurements/Blood Pressure
ankbp
Supine ankle systolic blood pressure (BP)
Supine ankle systolic blood pressure (BP) Measurements/Blood Pressure
armbp
Supine arm systolic blood pressure (BP)
Supine arm systolic blood pressure (BP) Measurements/Blood Pressure
dias120
Diastolic blood pressure (BP): reading 1 of 3 (Sleep Heart Health Study Visit One (SHHS1))
Diastolic blood pressure (BP): reading 1 of 3 (Sleep Heart Health Study Visit One (SHHS1))

Seated diastolic blood pressure (BP)- first reading

 		Measurements/Blood Pressure
dias220
Diastolic blood pressure (BP): reading 2 of 3 (Sleep Heart Health Study Visit One (SHHS1))
Diastolic blood pressure (BP): reading 2 of 3 (Sleep Heart Health Study Visit One (SHHS1))

Seated diastolic blood pressure (BP)- second reading

 		Measurements/Blood Pressure
dias320
Diastolic blood pressure (BP): reading 3 of 3 (Sleep Heart Health Study Visit One (SHHS1))
Diastolic blood pressure (BP): reading 3 of 3 (Sleep Heart Health Study Visit One (SHHS1))

Seated diastolic blood pressure (BP)- third reading

 		Measurements/Blood Pressure
pm217
Site of Arm blood pressure (BP) Measurement (Sleep Heart Health Study Visit Two (SHHS2))
Site of Arm blood pressure (BP) Measurement (Sleep Heart Health Study Visit Two (SHHS2))

17. Arm blood pressure (BP) site:

 		Measurements/Blood Pressure
pm220a1
Systolic blood pressure (BP) (measurement 1) (Sleep Heart Health Study Visit Two (SHHS2))
Systolic blood pressure (BP) (measurement 1) (Sleep Heart Health Study Visit Two (SHHS2))

20. Seated Blood Pressure (BP): a. First reading: systolic

 		Measurements/Blood Pressure
pm220a2
Diastolic blood pressure (BP) (measurement 1) (Sleep Heart Health Study Visit Two (SHHS2))
Diastolic blood pressure (BP) (measurement 1) (Sleep Heart Health Study Visit Two (SHHS2))

20. Seated Blood Pressure (BP): a. First reading: diastolic

 		Measurements/Blood Pressure
pm220b1
Systolic blood pressure (BP) (measurement 2) (Sleep Heart Health Study Visit Two (SHHS2))
Systolic blood pressure (BP) (measurement 2) (Sleep Heart Health Study Visit Two (SHHS2))

20. Seated Blood Pressure (BP): b. Second reading: systolic

 		Measurements/Blood Pressure
pm220b2
Diastolic blood pressure (BP) (measurement 2) (Sleep Heart Health Study Visit Two (SHHS2))
Diastolic blood pressure (BP) (measurement 2) (Sleep Heart Health Study Visit Two (SHHS2))

20. Seated Blood Pressure (BP): b. Second reading: diastolic

 		Measurements/Blood Pressure
pm220c1
Systolic blood pressure (BP) (measurement 3) (Sleep Heart Health Study Visit Two (SHHS2))
Systolic blood pressure (BP) (measurement 3) (Sleep Heart Health Study Visit Two (SHHS2))

20. Seated Blood Pressure (BP): c. Third reading: systolic

 		Measurements/Blood Pressure
pm220c2
Diastolic blood pressure (BP) (measurement 3) (Sleep Heart Health Study Visit Two (SHHS2))
Diastolic blood pressure (BP) (measurement 3) (Sleep Heart Health Study Visit Two (SHHS2))

20. Seated Blood Pressure (BP): c. Third reading: diastolic

 		Measurements/Blood Pressure
pm227
Site of Arm (Ankle Arm Blood Pressure Index-AAI) Measurement (Sleep Heart Health Study Visit Two (SHHS2))
Site of Arm (Ankle Arm Blood Pressure Index-AAI) Measurement (Sleep Heart Health Study Visit Two (SHHS2))

27. Arm blood pressure (BP) site for Ankle Arm Blood Pressure Index (AAI):

 		Measurements/Blood Pressure
syst120
Systolic blood pressure (BP): reading 1 of 3 (Sleep Heart Health Study Visit One (SHHS1))
Systolic blood pressure (BP): reading 1 of 3 (Sleep Heart Health Study Visit One (SHHS1))

Seated systolic blood pressure (BP)- first reading

 		Measurements/Blood Pressure
syst220
Systolic blood pressure (BP): reading 2 of 3 (Sleep Heart Health Study Visit One (SHHS1))
Systolic blood pressure (BP): reading 2 of 3 (Sleep Heart Health Study Visit One (SHHS1))

Seated systolic blood pressure (BP)- second reading

 		Measurements/Blood Pressure
syst320
Systolic blood pressure (BP): reading 3 of 3 (Sleep Heart Health Study Visit One (SHHS1))
Systolic blood pressure (BP): reading 3 of 3 (Sleep Heart Health Study Visit One (SHHS1))

Seated systolic blood pressure (BP)- third reading

 		Measurements/Blood Pressure
afib
Atrial Fibrillation or Flutter
Atrial Fibrillation or Flutter

Minnesota (MN) code 8-3-1 or 8-3-2. Data derived from standard resting 12-lead electrocardiogram (ECG) with the participant supine. Records were interpreted and Minnesota (MN) codes were provided by clinical cardiologists.

 		Measurements/ECG
antlatmi
Anterolateral myocardial infarction (MI)
Anterolateral myocardial infarction (MI)

Data derived from standard resting 12-lead electrocardiogram (ECG) with the participant supine. Records were interpreted and Minnesota (MN) codes were provided by clinical cardiologists.

 		Measurements/ECG
antsepmi
Anteroseptal myocardial infarction (MI)
Anteroseptal myocardial infarction (MI)

Data derived from standard resting 12-lead electrocardiogram (ECG) with the participant supine. Records were interpreted and Minnesota (MN) codes were provided by clinical cardiologists.

 		Measurements/ECG
apbs
Atrial bypasses
Atrial bypasses

Minnesota (MN) code 8-1-1. Data derived from standard resting 12-lead electrocardiogram (ECG) with the participant supine. Records were interpreted and Minnesota (MN) codes were provided by clinical cardiologists.

 		Measurements/ECG
av1deg
First degree atrioventricular block
First degree atrioventricular block

Minnesota (MN) code 6-3. Data derived from standard resting 12-lead electrocardiogram (ECG) with the participant supine. Records were interpreted and Minnesota (MN) codes were provided by clinical cardiologists.

 		Measurements/ECG
av3deg
Third degree atrioventricular block
Third degree atrioventricular block

Minnesota (MN) code 6-1. Data derived from standard resting 12-lead electrocardiogram (ECG) with the participant supine. Records were interpreted and Minnesota (MN) codes were provided by clinical cardiologists.

 		Measurements/ECG
ecgdate
Number of days since the baseline Polysomnography (PSG) until collected: electrocardiogram (ECG)
Number of days since the baseline Polysomnography (PSG) until collected: electrocardiogram (ECG)

Data derived from standard resting 12-lead electrocardiogram (ECG) with the participant supine. Records were interpreted and Minnesota (MN) codes were provided by clinical cardiologists.

 		Measurements/ECG
ilbbb
Incomplete left bundle-branch block
Incomplete left bundle-branch block

Minnesota (MN) code 7-6. Data derived from standard resting 12-lead electrocardiogram (ECG) with the participant supine. Records were interpreted and Minnesota (MN) codes were provided by clinical cardiologists.

 		Measurements/ECG
infmi
Inferior myocardial infarction (MI)
Inferior myocardial infarction (MI)

Data derived from standard resting 12-lead electrocardiogram (ECG) with the participant supine. Records were interpreted and Minnesota (MN) codes were provided by clinical cardiologists.

 		Measurements/ECG
irbbb
Incomplete right bundle-branch block
Incomplete right bundle-branch block

Minnesota (MN) code 7-3. Data derived from standard resting 12-lead electrocardiogram (ECG) with the participant supine. Records were interpreted and Minnesota (MN) codes were provided by clinical cardiologists.

 		Measurements/ECG
iventblk
Indeterminate intraventricular block pattern
Indeterminate intraventricular block pattern

Minnesota (MN) code 7-4. Data derived from standard resting 12-lead electrocardiogram (ECG) with the participant supine. Records were interpreted and Minnesota (MN) codes were provided by clinical cardiologists.

 		Measurements/ECG
lah
Left Atrial Hypertrophy
Left Atrial Hypertrophy

Minnesota (MN) code 7-7. Data derived from standard resting 12-lead electrocardiogram (ECG) with the participant supine. Records were interpreted and Minnesota (MN) codes were provided by clinical cardiologists.

 		Measurements/ECG
lbbb
Left bundle-branch block
Left bundle-branch block

Minnesota (MN) code 7-1-1. Data derived from standard resting 12-lead electrocardiogram (ECG) with the participant supine. Records were interpreted and Minnesota (MN) codes were provided by clinical cardiologists.

 		Measurements/ECG
lvh3_1
Left Ventricular Hypertrophy: Voltage 3-1
Left Ventricular Hypertrophy: Voltage 3-1

Minnesota (MN) code 3-1. Data derived from standard resting 12-lead electrocardiogram (ECG) with the participant supine. Records were interpreted and Minnesota (MN) codes were provided by clinical cardiologists.

 		Measurements/ECG
lvh3_3
Left Ventricular Hypertrophy: Voltage 3-3
Left Ventricular Hypertrophy: Voltage 3-3

Minnesota (MN) code 3-3. Data derived from standard resting 12-lead electrocardiogram (ECG) with the participant supine. Records were interpreted and Minnesota (MN) codes were provided by clinical cardiologists.

 		Measurements/ECG
lvhst
Left Ventricular Hypertrophy with ST and T-wave abnormalities
Left Ventricular Hypertrophy with ST and T-wave abnormalities

Data derived from standard resting 12-lead electrocardiogram (ECG) with the participant supine. Records were interpreted and Minnesota (MN) codes were provided by clinical cardiologists.

 		Measurements/ECG
mob1
Mobitz Type-1 Heart Block
Mobitz Type-1 Heart Block

Second degree atrioventricular (Mobitz) type-1 heart block. Minnesota (MN) code 6-2-3. Data derived from standard resting 12-lead electrocardiogram (ECG) with the participant supine. Records were interpreted and Minnesota (MN) codes were provided by clinical cardiologists.

 		Measurements/ECG
mob2
Mobitz Type-2 Heart Block
Mobitz Type-2 Heart Block

Second degree atrioventricular (Mobitz) type-2 heart block. Minnesota (MN) code 6-2-1. Data derived from standard resting 12-lead electrocardiogram (ECG) with the participant supine. Records were interpreted and Minnesota (MN) codes were provided by clinical cardiologists.

 		Measurements/ECG
nodal
Nodal rhythm
Nodal rhythm

Abnormal heart rhythm resulting from impulses from the atrioventricular node. Minnesota (MN) code 8-4-1. Data derived from standard resting 12-lead electrocardiogram (ECG) with the participant supine. Records were interpreted and Minnesota (MN) codes were provided by clinical cardiologists.

 		Measurements/ECG
nonsp_st
Nonspecific ST wave abnormalty
Nonspecific ST wave abnormalty

Data derived from standard resting 12-lead electrocardiogram (ECG) with the participant supine. Records were interpreted and Minnesota (MN) codes were provided by clinical cardiologists.

 		Measurements/ECG
nonsp_tw
Nonspecific T wave abnormalty
Nonspecific T wave abnormalty

Data derived from standard resting 12-lead electrocardiogram (ECG) with the participant supine. Records were interpreted and Minnesota (MN) codes were provided by clinical cardiologists.

 		Measurements/ECG
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