COPD in China: the burden and importance of proper management.

Chest · 2011 · PMC7125604 · PMID 21467059

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a decreasing trendno p-value reported

22 Both crude and age-adjusted COPD mortality rates have fluctuated but have displayed a decreasing trend from 1990 ( Fig 1A ), 22 which is probably because of improved management of COPD, upgraded technologies, and awareness of the disease.

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