Figure 2From: Clinical trial design in chronic obstructive pulmonary disease: current perspectives and considerations with regard to blinding of tiotropiumPercentages of tiotropium-treated patients achieving the minimum clinically important difference (MCID) for St. George’s Respiratory Questionnaire (SGRQ) score in INHANCE[29], INTENSITY[11]and other studies in which tiotropium was the primary treatment of investigation.Back to article page