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Letters to the editor
Self-management of asthma in general practice
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We welcome the paper by Thoonen and colleagues on self-management of asthma in general practice1 as we firmly believe that self-management of chronic diseases is a promising area for innovation in general practice.
We wondered whether differential withdrawals—specifically, the difference between groups in the number of patients for whom successfully treated weeks could be calculated—may have affected the outcomes. As reported, 92% of the patients in the usual care (UC) group provided data for this primary outcome compared with 85% of the self-management (SM) group. The mean percentage of successfully treated weeks was 72% and 78% for …