Figures & data
Table 1 Demographic characteristics
Table 2 Traditional spirometry severity, with patient and physician assessments of COPD severity prior to spirometry
Figure 1 Comparison of patient assessment of severity versus traditional GOLD spirometry stages, and new GOLD mMRC and CAT groups.
Notes: The colored bars represent the proportion of patients within each level of comparison; for example, 46% of patients rated their COPD as being less severe than the severity rating measured by spirometry. The kappa coefficient (κ) describes the agreement about COPD severity within each level of comparison and provides a summary result ranging from 0 (no agreement) to 1 (perfect agreement). While κ values less than 0.20 indicate very poor agreement, the P-values less than 0.001 suggest that these are still better than purely random associations.
Abbreviations: GOLD, Global Initiative for Chronic Obstructive Lung Disease; mMRC, modified Medical Research Council Dyspnea Scale; CAT, COPD Assessment Test.
Figure 2 Comparison of primary care physician assessment of severity versus the patient, traditional GOLD spirometry level, and the GOLD mMRC and CAT groups.
Abbreviations: GOLD, Global Initiative for Chronic Obstructive Lung Disease; mMRC, modified Medical Research Council Dyspnea Scale; CAT, COPD Assessment Test; Doc, doctor.
Table 3 New GOLD grade by mMRC and CAT results, stratified by traditional GOLD spirometry stage
Table 4 Twelve-month exacerbation history stratified by traditional GOLD spirometry stage, and new GOLD mMRC or CAT groups