There were significant difference in the FEV1(%)and FEV1/FVC(%) rates from mild to very severe COPD and controls(P<0.05).

COPD轻度、中度、重度和极重度与对照组的FEV1（%）和FEV1/FVC（%）差异有统计学意义（P〈0.05）。

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There were significant difference in the FEV1(%)and FEV1/FVC(%) rates from mild to very severe COPD and controls(P<0.05).

COPD轻度、中度、重度和极重度与对照组的FEV1（%）和FEV1/FVC（%）差异有统计学意义（P〈0.05）。

youdao