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Figure 2 | Respiratory Research

Figure 2

From: Acute bronchodilator responses decline progressively over 4 years in patients with moderate to very severe COPD

Figure 2

Mean percent changes (±SD) (Δ = post - minus pre-bronchodilator FEV1 and FVC, ml/pre-bronchodilator FEV1 and FVC, ml * 100, %) over 4 years by treatment group. Mean relative FEV1 responses (percent changes) are shown for the placebo group (A) and the tiotropium group (B) separately. Mean relative responses (percent changes) in FVC are shown for the placebo group (C) and the tiotropium group (D) separately.

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Respiratory Research

ISSN: 1465-993X

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