Fig. 1From: How stable is lung function in patients with stable chronic obstructive pulmonary disease when monitored using a telehealth system? A longitudinal and home-based studyWeekly means of FEV1 (% of predicted), IC (% of predicted), SpO2 and CAT. Boxes show median and IQR, whiskers show range. Solid lines show the corresponding measurements from the baseline spirometry before the start of home monitoring. FEV1: Forced Expiratory Volume in one second, IC: Inspiratory Capacity, SpO2: Oxygen saturation measured by pulse oximetry, CAT: COPD Assessment TestBack to article page