Figure 1. Study Flowchart, • indicates pulmonary function test was performed; ♦ indicates SGRQ, St. George's Respiratory Questionnaire was completed, Diary card was dispensed and reclaimed. NAC: N-acetylcysteine.
Table 1. Baseline characteristics of the patients
Table 2. History of COPD
Table 3. Baseline lung function and bronchial dilation tests and SGRQ scores
Table 4. COPD medications at entry and during the past 3 months
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