I have a couple of questions about the spirometry data in the SHHS datasets, and am not sure where to find the answers.
Are the FEV1 & FVC results from pre- or post- bronchodilator administration?
Are the FEV1 & FVC results the average from X number of trials, or the best, or the first?
Was there any sort of guarantor of session/technique quality?
Were participants asked to refrain from using inhaled medications, smoking etc for XX period of time before spirometry?
Was it conducted standing or seated?
I imagine this sort of information must be somewhere, but I can't find it in the datasets, nor the manual of operations or the Forms etc.
Any help pointing me in the right direction would be much appreciated.