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Table 3 Health-related quality of life scores, adjusted mean values (± SD) – GOLD criteria

From: Health-related quality of life is related to COPD disease severity

Scale FEV1 % predicted
  ≥ 80% Stage I n = 26 79-50% Stage II n = 91 49-30% Stage III n = 33 < 30% Stage IV n = 9 p-value (all stages)
SF-36 PCS 42(12) 42(12) 40(10) 29(12) 0.0059
SF-36 MCS 55(8) 51(11) 52(12) 48(18) 0.19
SGRQ Total 25(20) 32(20) 36(20) 53(23) 0.0005
EQ-5D VAS 73(21) 65(24) 62(21) 37(28) 0.0001
EQ-5D index 0.84(0.15) 0.73(0.23) 0.74(0.25) 0.52(0.26) 0.0008