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. 2013 Jun 3;13:35. doi: 10.1186/1471-2466-13-35

Table 6.

Classifications of COPD groups using mMRC scores (cutpoint of mMRC = 1)* (n = 257)

High risk
9 (3.5%)
133(51.8%)
Low risk 41 (16.0%)
74(28.8%)
mMRC < 1 mMRC ≥ 1

*Kappa agreement with COPD groups classified by CAT scores was 0.649.