Unpaired t -test on the mean change scores in A&E visits just failed to reach significance (CM group mean change=−0.30, (s.e. 0.09), IB group mean change=0.06, (s.e. 0.16), t (220)=1.994, P =0.047, CI 0.01–0.73, r =0.13).
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'The COPD breathlessness manual': a randomised controlled trial to test a cognitive-behavioural manual versus information booklets on health service use, mood and health status, in patients with chronic obstructive pulmonary disease.
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