Fig. 1From: Smoking exposure, loss of forced expiratory volume in one second and the risk of lung cancer among patients with malignant disease who present with cardiac or pulmonary symptoms: a cross-sectional studyPatient selection algorithm. 1The patient did not turn up for lung function testing (n = 2), was deemed too sick for spirometry (n = 4), or was deemed too sick to sit in the plethysmograph, but the TLC % predicted value was required for adjusting the FEV1 % predicted value in patients with restrictive lung disease (n = 11)Back to article page