Figure 3From: Effect of exacerbations on health status in subjects with chronic obstructive pulmonary disease Changes in the CRQ scores over 6 months in subjects without acute exacerbations (gray bars), subjects with one exacerbation (hatched bars), and those with two or more exacerbations (open bars). The results are presented as means ± SE. *: p < 0.05 versus baseline.Back to article page