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Table 6 Difference between disease stages

From: Health-related quality of life in patients with severe COPD hospitalized for exacerbations - comparing EQ-5D, SF-12 and SGRQ

Instrument n Stage III Stage IV p-value*
EQ-5D 231 0.73 0.68 0.180
VAS 243 52 45 0.009
SF-12 - SF-6D 173 0.62 0.56 0.003
SF-12 - PCS 141 30 30 0.599
SF-12 - MCS 141 47 41 0.007
SGRQ - total 234 63 69 0.008
SGRQ - symptoms 243 75 72 0.317
SGRQ - activity 240 78 85 0.008
SGRQ - impact 240 51 59 0.005
  1. * from mixed linear regression adjusted for age, sex, smoking status and time of assessment
  2. MCS: mental component score; PCS: physical component score.