Patients whose bronchodilator response testing was not diagnostic had their peak expiratory flow variability formally assessed more often.

Patients are more likely to have positive bronchodilator responsiveness in the morning and in winter months.

Lastly, researchers looked at the discriminative performance of pre-bronchodilator PEF by spirometry rather than by the Piko-1 in 8,037 adults and found a higher AUC in the model combining SGRQ ...