We use cookies and other tools to enhance your experience on our website and to analyze our web traffic.
For more information about these cookies and the data collected, please refer to our Privacy Policy.

NCH Sleep DataBank

Name Label Folder
study_pat_id
NCHSDB Subject ID
NCHSDB Subject ID

A pseudo identifier with a consistent crosswalk to the true identifier retained by the source Data Partner. For analytical data sets requiring patient-level data, only the pseudo identifier is used to link across all information belonging to a patient.

Administrative
nsrr_bmi
Body mass index (BMI)
Body mass index (BMI)

Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: bmi

Harmonized/Anthropometry
nsrr_bmipct
Body mass index (BMI) percentile
Body mass index (BMI) percentile

Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: bmipct

Harmonized/Anthropometry
nsrr_bp_diastolic
Diastolic blood pressure
Diastolic blood pressure

Single measure of resting diastolic blood pressure collected from the upper arm in a clinic visit closest to the sleep test.

Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: bp_diastolic

Harmonized/Clinical Data
nsrr_bp_systolic
Systolic blood pressure
Systolic blood pressure

Single measure of resting systolic blood pressure collected from the upper arm in a clinic visit closest to the sleep test.

Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: Source: bp_systolic

Harmonized/Clinical Data
nsrr_age
Subject age
Subject age

Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: age_at_sleep_study_days

Harmonized/Demographics
nsrr_age_gt89
Indicates whether the subject's age (in years) used during date obfuscation is greater than 89 years
Indicates whether the subject's age (in years) used during date obfuscation is greater than 89 years

Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: age_at_sleep_study_days

Harmonized/Demographics
nsrr_ethnicity
Subject ethnicity
Subject ethnicity

Original missing value is recoded as "not reported".

Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: pcori_hispanic_cd

Harmonized/Demographics
nsrr_race
Subject race
Subject race

Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: pcori_race_cd

Harmonized/Demographics
nsrr_sex
Subject sex
Subject sex

Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: pcori_gender_cd

Harmonized/Demographics
encounter
Encounter number
Encounter number Administrative
bmi
Body mass index (BMI)
Body mass index (BMI)

The NSRR team extracted values from the MEASUREMENT.CSV file and kept the value closest to the time of the sleep study. Reference: bmi_offset

Anthropometry
bmi_offset
Difference between date of body mass index (BMI) measurement and sleep test
Difference between date of body mass index (BMI) measurement and sleep test

Derived using dates from the MEASUREMENT.CSV and SLEEP_STUDY.CSV data files.

Anthropometry
bmipct
Body mass index (BMI) percentile
Body mass index (BMI) percentile

The NSRR team extracted values from the MEASUREMENT.CSV file and kept the value closest to the time of the sleep study. Reference: bmipct_offset

Anthropometry
bmipct_offset
Difference between date of body mass index (BMI) percentile measurement and sleep test
Difference between date of body mass index (BMI) percentile measurement and sleep test

Derived using dates from the MEASUREMENT.CSV and SLEEP_STUDY.CSV data files.

Anthropometry
bp_diastolic
Single measure of seated diastolic blood pressure closest to the sleep test
Single measure of seated diastolic blood pressure closest to the sleep test

The NSRR team extracted values from the MEASUREMENT.CSV file and kept the value closest to the time of the sleep study. Reference: bp_offset

Clinical Data/Vital Signs/Seated Blood Pressure
bp_offset
Difference between date of systolic and diastolic blood pressure measurements and sleep test
Difference between date of systolic and diastolic blood pressure measurements and sleep test

Derived using dates from the MEASUREMENT.CSV and SLEEP_STUDY.CSV data files.

Clinical Data/Vital Signs/Seated Blood Pressure
bp_systolic
Single measure of seated systolic blood pressure closest to the sleep test
Single measure of seated systolic blood pressure closest to the sleep test

The NSRR team extracted values from the MEASUREMENT.CSV file and kept the value closest to the time of the sleep study. Reference: bp_offset

Clinical Data/Vital Signs/Seated Blood Pressure
age_at_sleep_study_days
The age of the patient in days at the time of the sleep study
The age of the patient in days at the time of the sleep study Demographics
birth_date
Date of birth
Date of birth

For each STUDY_PAT_ID, a random date shift of +/- 180 days was chosen, and all identified patient data that are linked to the STUDY_PAT_ID (i.e. from EHR and Natus) were adjusted.

Demographics
ethnicity_descr
Patient ethnicity (text)
Patient ethnicity (text) Demographics
gender_descr
Patient gender (text)
Patient gender (text) Demographics
language_descr
Patient language (text)
Patient language (text) Demographics
pcori_gender_cd
Patient gender
Patient gender Demographics
pcori_hispanic_cd
Patient is of Hispanic ethnicity
Patient is of Hispanic ethnicity

A person of Cuban, Mexican, Puerto Rican, South or Central American, or other Spanish culture or origin, regardless of race.

Demographics
pcori_race_cd
Patient race
Patient race Demographics
peds_gest_age_num_days
Patient's gestational age in days (when available)
Patient's gestational age in days (when available) Demographics
peds_gest_age_num_weeks
Patient's gestational age truncated to the nearest full week (when available)
Patient's gestational age truncated to the nearest full week (when available) Demographics
race_descr
Patient race (text)
Patient race (text) Demographics