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Table 2 Score distribution of the Total score of the SGRQ and CAT scores

From: COPD and disease-specific health status in a working population

  SGRQ Total (0–100) CAT (0–40)
  Mean Median SD Max Floor effect Mean Median SD Max Floor effect
All subjects 6.4 5.3 5.7 51.5 8.9% 6.4 6.0 4.6 26.0 7.4%
Non-COPD defined by fixed ratio 6.31) 5.3 5.4 43.2 9.1% 6.3 6.0 4.5 24.0 7.3%
COPD defined by fixed ratio 7.9 6.4 7.6 51.5 6.9% 7.3 6.0 5.2 26.0 7.6%
Non-COPD defined by LLN 6.3 5.3 5.6 51.5 8.6% 6.4 6.0 4.5 24.0 7.0%
COPD defined by LLN 8.4 6.7 7.5 34.0 13.4% 7.4 6.0 5.9 26.0 13.4%
Healthy non-smoking subjects¶# 5.72)3)4)5) 4.9 4.9 43.2 10.5% 5.82)3)4) 5.0 4.4 23.0 9.4%
Healthy smoking subjects¶* 6.8 5.8 5.5 37.1 7.5% 6.8 6.0 4.4 24.0 5.3%
COPD/GOLD stageI 8.1 5.7 9.2 51.5 5.0% 7.2 6.0 5.1 21.0 6.7%
COPD/GOLD stageII 7.5 6.4 6.1 26.8 8.9% 7.2 6.0 5.3 26.0 8.9%
  1. ¶ FEV1 of >85% pred and FEV1/FVC of >0.7, # smoking history of <1 pack-yr, * smoking history of ≥10 pack-yrs.
  2. 1) p < 0.05 compared with COPD defined by fixed ratio.
  3. 2) p < 0.01 compared with healthy smoking subjects.
  4. 3) p < 0.01 compared with COPD defined by fixed ratio.
  5. 4) p < 0.05 compared with COPD/GOLD stageII.
  6. 5) p < 0.05 compared with COPD defined by LLN.