Percentiles (P) and means with standard deviation (sd) of the St George's Respiratory Questionnaire (SGRQ) scale scores by age
| 40–49 | 50–59 | 60–69 | |
| Symptoms | |||
| P5 | 0.0 | 0.0 | 0.0 |
| P10 | 0.0 | 0.0 | 0.0 |
| P20 | 0.0 | 0.0 | 0.0 |
| P30 | 0.0 | 0.0 | 4.42 |
| P40 | 0.0 | 0.0 | 6.82 |
| P50/median | 4.24 | 6.88 | 11.88 |
| P60 | 9.46 | 9.55 | 15.16 |
| P70 | 12.17 | 12.71 | 23.43 |
| P80 | 16.44 | 16.44 | 29.11 |
| P90 | 25.32 | 32.48 | 42.30 |
| P95 | 32.60 | 42.79 | 49.93 |
| Mean±sd | 8.83±12.41 | 10.34±14.35 | 16.13±16.77 |
| Activity | |||
| P5 | 0.0 | 0.0 | 0.0 |
| P10 | 0.0 | 0.0 | 0.0 |
| P20 | 0.0 | 0.0 | 0.0 |
| P30 | 0.0 | 0.0 | 0.0 |
| P40 | 0.0 | 0.0 | 0.0 |
| P50/median | 0.0 | 5.97 | 11.16 |
| P60 | 5.96 | 11.21 | 16.87 |
| P70 | 11.21 | 17.32 | 22.60 |
| P80 | 17.12 | 25.45 | 35.19 |
| P90 | 23.13 | 36.93 | 47.69 |
| P95 | 29.31 | 47.61 | 60.37 |
| Mean±sd | 7.76±11.15 | 12.69±16.59 | 16.28±20.41 |
| Impacts | |||
| P5 | 0.0 | 0.0 | 0.0 |
| P10 | 0.0 | 0.0 | 0.0 |
| P20 | 0.0 | 0.0 | 0.0 |
| P30 | 0.0 | 0.0 | 0.0 |
| P40 | 0.0 | 0.0 | 0.0 |
| P50/median | 0.0 | 0.0 | 2.30 |
| P60 | 0.0 | 3.55 | 4.77 |
| P70 | 0.0 | 5.47 | 7.75 |
| P80 | 5.03 | 9.22 | 16.01 |
| P90 | 9.48 | 14.60 | 22.84 |
| P95 | 15.10 | 22.27 | 38.77 |
| Mean±sd | 2.82±6.73 | 4.99±8.90 | 8.14±4.12 |
| Total | |||
| P5 | 0.0 | 0.0 | 0.0 |
| P10 | 0.0 | 0.0 | 0.0 |
| P20 | 0.0 | 0.0 | 1.13 |
| P30 | 1.65 | 2.08 | 2.08 |
| P40 | 1.95 | 3.66 | 4.54 |
| P50/median | 2.72 | 5.48 | 6.98 |
| P60 | 3.67 | 6.60 | 11.40 |
| P70 | 6.56 | 8.75 | 14.13 |
| P80 | 9.71 | 15.93 | 19.58 |
| P90 | 11.65 | 23.34 | 30.64 |
| P95 | 22.62 | 29.97 | 46.58 |
| Mean±sd | 5.49±7.72 | 8.41±10.74 | 12.17±14.89 |
Data are presented as SGRQ scale scores unless otherwise stated
Males from the general population weighted sample (n=533)