Development, validity and responsiveness of the Clinical COPD Questionnaire.

Health Qual Life Outcomes · 2003 · PMC156640 · PMID 12773199

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did not reach statistical significanceno p-value reported

In our study the CCQ shows significant improvement after two months smoking cessation while scores on the SGRQ, although in the same direction, did not reach statistical significance.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.