Patient characteristics at presentation with an acute exacerbation of chronic bronchitis (Anthonisen type 1)
| Exacerbators (n=134) | Non-exacerbators (n=304) | |
|---|---|---|
| Non-exacerbators=patients who had no further exacerbations during the 6 months following the episode with which they presented; exacerbators=those who had a further exacerbation during the following 6 months. | ||
| Sex, n (%) | ||
| Female | 64 (31) | 143 (69) |
| Male | 70 (30) | 161 (70) |
| Smoking status, n (%) | ||
| Smoker | 107 (29) | 257 (71) |
| Non-smoker | 27 (36) | 47 (64) |
| Mean (SD) pack years | 35 (36) | 30 (28) |
| Mean (SD) age at baseline | 59 (12) | 58 (12) |
| Mean (SD) peak flow (% predicted) | 58 (23) | 59 (25) |
| Mean (SD) Total SGRQ | 58.6 (17.3) | 53.2 (16.7) |