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. 2014 Nov 28;12(Suppl 2):S3. doi: 10.1186/1479-5876-12-S2-S3

Table 1.

Risk classification of COPD patients according to the 2011 GOLD Update [1]

RISK
GOLD Classification 		3-4 C
High Risk,
Less Symptoms		 D
High Risk,
More Symptoms		 ≥2 RISK
Exacerbation History
1-2 A
Low Risk,
Less Symptoms		 B
Low Risk,
More Symptoms		 0-1
mMRC 0-1 mMRC ≥ 2
CAT < 10 CAT ≥ 10

The 2011 COPD Update [1] defines four risk categories for COPD patients (A to D) depending upon: i) symptoms (modified dyspnea score from th Medical Research Council, mMRC) or CAT questionnaire; ii) spirometric classification: GOLD I: FEV1 ≥ 80% pred; GOLD II: 50% ≤ FEV1 < 80% pred; GOLD III: 30% ≤ FEV1 < 50% pred; and, GOLD IV: FEV1 < 30% and/or PaO2 < 60 mmHg breathing FIO2 0.21); and, iii) frequency of exacerbations per year. Recent reports have assessed the predictive value of this classification [16,17]