Fig. 2From: Effect of tiotropium on night-time awakening and daily rescue medication use in patients with COPDBaseline distribution of weekly mean scores of night-time awakening for patients who experienced at least one night-time awakening. For each night, patients scored: 0 for no awakenings; 1 for one awakening; 2 for two or three awakenings; and 3 for being awake for most of the night; these scores were used to calculate a weekly mean for each patientBack to article page