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Figure 1 | Respiratory Research

Figure 1

From: Clinical trial design in chronic obstructive pulmonary disease: current perspectives and considerations with regard to blinding of tiotropium

Figure 1

Differences in trough forced expiratory volume in 1 second (FEV 1 ) between tiotropium and placebo in INHANCE[9]and studies in which tiotropium was the primary treatment of investigation. Values are means and standard errors. *Includes assessments made at 11, 12 and 13 weeks; †Includes assessments made at 25 weeks; ‡Estimated from a figure (no standard error available); #No standard error available.

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Respiratory Research

ISSN: 1465-993X

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