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Table 4 Health-related quality of life scores, adjusted mean values (± SD) – BTS criteria

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

Scale FEV1 % predicted
  ≥ 80% Stage 0 n = 26 79-60% Stage I n = 63 59-40% Stage II n = 47 < 40%Stage III n = 23 p-value (all stages)
SF-36 PCS 42(12) 43(11) 40(13) 35(11) 0.032
SF-36 MCS 55(8) 50(10) 54(11) 50(15) 0.29
SGRQ Total 25(20) 32(20) 34(19) 45(22) 0.0023
EQ-5D VAS 73(21) 68(20) 60(28) 50(25) 0.0007
EQ-5D index 0.84(0.15) 0.74(0.21) 0.72(0.28) 0.63(0.25) 0.0041