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Table 2 Summary statistics of EQ-5D utilities and CAT scores

From: Mapping analysis to estimate EQ-5D utility values using the COPD assessment test in Korea

Variable Mean SD
EQ-5D utility 0.83 (0.15)
Total CAT score 16.38 (8.96)
 Q1: cough 1.68 (1.38)
 Q2: phlegm 2.13 (1.42)
 Q3: chest tightness 1.59 (1.43)
 Q4: breathlessness 3.23 (1.46)
 Q5: home activities 1.81 (1.62)
 Q6: leaving home 1.82 (1.68)
 Q7: sleep 1.74 (1.58)
 Q8: energy 2.38 (1.38)
  1. The EQ-5D utility scores were calculated using the equation from Lee et al. [7]. Eight each CAT item is scored on a scale of 0–5, and the total CAT score ranges from 0 to 40