Table 3 Score distribution of the three components of the SGRQ
From: COPD and disease-specific health status in a working population
SGRQ Symptoms (0–100) | SGRQ Activity (0–100) | SGRQ Impact (0–100) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mean | Median | SD | Max | Floor effect | Mean | Median | SD | Max | Floor effect | Mean | Median | SD | Max | Floor effect | |
All subjects | 15.8 | 13.5 | 14.0 | 81.8 | 19.1% | 9.1 | 6.0 | 9.1 | 59.5 | 34.0% | 1.8 | 0.0 | 4.9 | 47.2 | 77.8% |
Non-COPD defined by fixed ratio | 15.01)2)3) | 12.9 | 13.5 | 74.0 | 20.1% | 9.1 | 6.0 | 8.9 | 59.5 | 33.3% | 1.71)3) | 0.0 | 4.7 | 44.3 | 79.0% |
COPD defined by fixed ratio | 21.7 | 18.8 | 16.3 | 81.8 | 10.3% | 9.3 | 6.0 | 10.9 | 48.9 | 39.3% | 2.7 | 0.0 | 6.0 | 47.2 | 67.6% |
Non-COPD defined by LLN | 15.44) | 12.9 | 13.7 | 81.8 | 19.1% | 9.1 | 6.0 | 8.9 | 59.5 | 33.4% | 1.74) | 0.0 | 4.8 | 47.2 | 78.8% |
COPD defined by LLN | 22.0 | 18.8 | 16.5 | 76.3 | 17.9% | 9.5 | 6.0 | 11.9 | 43.0 | 44.8% | 3.4 | 0.0 | 5.6 | 26.6 | 59.7% |
Healthy non-smoking subjects¶# | 12.51)2)3)4) | 11.0 | 11.7 | 74.0 | 23.8% | 8.9 | 6.2 | 9.0 | 59.5 | 36.1% | 1.41)3)4)8) | 0.0 | 4.7 | 44.3 | 82.2% |
Healthy smoking subjects¶* | 17.31)4)7) | 15.4 | 14.0 | 72.2 | 16.0% | 9.1 | 6.0 | 8.3 | 45.5 | 28.8% | 1.94)9) | 0.0 | 5.0 | 36.3 | 75.9% |
COPD/GOLD stageI | 21.9 | 20.3 | 17.6 | 81.8 | 6.7% | 9.2 | 6.0 | 11.3 | 48.9 | 38.3% | 3.1 | 0.0 | 7.9 | 47.2 | 73.3% |
COPD/GOLD stageII | 21.3 | 18.7 | 15.8 | 76.3 | 13.9% | 8.8 | 6.0 | 10.1 | 43.0 | 40.5% | 2.3 | 0.0 | 4.2 | 18.1 | 67.1% |