Spirometry reference values
- Recognizable as variables XXX_change_all_c_1, XXX_lowerlimit_all_c_1,XXX_percpredicted_all_c_1, XXX_predicted_all_c_1, XXX_zscore_all_c_1, fev1fvc_upperlimit_all_c_1, spirometry_bodylength_all_c_1, spirometry_valid_all_c_1
- Spirometry reference values wiki page
- Required reference: none