Factors associated with level of dyspnoea. MRC scoring 1–5 equals to mMRC grades 0–4 with MRC 1 being equal to mMRC 0.
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aOther smoker: no record about smoking history or record of passive smoking. Abbreviations: CI, confidence interval; COPD, chronic obstructive pulmonary disease; GOLD, global initiative for obstructive lung disease; GP, general practitioner; MRC, Medical Research Council.
创建时间：
2014-01-10
