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valid_spirometry under Clinical Data/Diagnostic Studies/Lung Function in HCHS variables
This variable is an overall data quality indicator derived by the pulmonary reading center on the adequacy study for use.
valid_spirometry_postbd under Clinical Data/Diagnostic Studies/Lung Function in HCHS variables
This variable is an overall data quality indicator derived by the pulmonary reading center on the adequacy study for use.
valid_spirometry_postbd_v2 under Clinical Data/Diagnostic Studies/Lung Function in HCHS variables
This variable is a flag for whether a post bronchodilator was valid (grade A-D). Defined only for participants where a post measurement was expected.
expsaw under Clinical Data/Diagnostic Studies/Lung Function/Spirometry in CFS variables
fef25 under Clinical Data/Diagnostic Studies/Lung Function/Spirometry in CFS variables
fef2575 under Clinical Data/Diagnostic Studies/Lung Function/Spirometry in CFS variables
fef50 under Clinical Data/Diagnostic Studies/Lung Function/Spirometry in CFS variables
fef75 under Clinical Data/Diagnostic Studies/Lung Function/Spirometry in CFS variables
fev1 under Clinical Data/Diagnostic Studies/Lung Function/Spirometry in CFS variables
fvc under Clinical Data/Diagnostic Studies/Lung Function/Spirometry in CFS variables
pef under Clinical Data/Diagnostic Studies/Lung Function/Spirometry in CFS variables
airflow_limitation under Clinical Data/Diagnostic Studies/Lung Function in HCHS variables
This variable is based on the empirical evidence from the spirometry that the ratio of FEV1 to FVC is below the level defined by the ATS as indicative of restricted airflow. Defined only for valid spirometries.
airflow_obstruction under Clinical Data/Diagnostic Studies/Lung Function in HCHS variables
This variable is based on the empirical evidence from the spirometry that the ratio of FEV1 to FVC is below the level defined by the ATS as indicative of restricted airflow.
copd_by_bd_allpre under Clinical Data/Diagnostic Studies/Lung Function in HCHS variables
This variable is based on the post-bronchodilator measurement of the FEV1 to FVC ratio. The airflow remains restricted after the administration of albuterol. This variable is also defined for all participants who did not conduct a post-spirometry exam. Defined only for valid spirometries.
postbd_expected under Clinical Data/Diagnostic Studies/Lung Function in HCHS variables
This variable is a flag for whether a post bronchodilator was expected, based on the premeasurement. A post measurement was expected if the FEV1 to FVC ratio was less than 70% or less than the lower limit of normal for FEV1/FVC%.
postbd_prebd_diff under Clinical Data/Diagnostic Studies/Lung Function in HCHS variables
This variable is based on the ratio of the measured FEV1 difference from postbronchodilator and pre-bronchodilator exams over the Predicted FEV1 calculated prebronch (both values must be non-missing, and the post-bronchodilator spirometry examinations must be valid).
postbd_prebd_diff_gt12_v2 under Clinical Data/Diagnostic Studies/Lung Function in HCHS variables
This variable is based on the ratio of the measured FEV1 difference from postbronchodilator and pre-bronchodilator exams over the Predicted FEV1 calculated prebronch (both values must be non-missing, and the post-bronchodilator spirometry examination must be valid) among participants with pre FEV1/FVC<70 only (ignores LLN comparison).
Cleveland Children's Sleep and Health Study
... studies, acoustic reflectometry, anthropometry, spirometry, blood pressure (BP), and ...
Cleveland Family Study
... Brachial Reactivity * 11. Spirometry * 12. Rhinometry * ...
f2575ppk under Clinical Data/Diagnostic Studies/Lung Function/Spirometry in CFS variables
fef25ppk under Clinical Data/Diagnostic Studies/Lung Function/Spirometry in CFS variables
fef50ppk under Clinical Data/Diagnostic Studies/Lung Function/Spirometry in CFS variables
fef75ppk under Clinical Data/Diagnostic Studies/Lung Function/Spirometry in CFS variables
fev1ppk under Clinical Data/Diagnostic Studies/Lung Function/Spirometry in CFS variables
fvcppk under Clinical Data/Diagnostic Studies/Lung Function/Spirometry in CFS variables