Table 3 History of acute exacerbations according to smoking status
Never-smoker (n = 75) | Ever-smoker (n = 508) | P-value* | Ex-smoker (n = 273) | Current smoker (n = 235) | P-value† | |
|---|---|---|---|---|---|---|
Annual incidence of acute exacerbations by severity, time/year | ||||||
Moderate | 0.22 ± 0.4 | 0.38 ± 0.67 | 0.078 | 0.44 ± 0.74 | 0.32 ± 0.58 | 0.078 |
Severe | 0.21 ± 0.39 | 0.26 ± 0.67 | 0.592 | 0.29 ± 0.71 | 0.23 ± 0.62 | 0.574 |
Moderate to severe | 0.43 ± 0.64 | 0.65 ± 1.07 | 0.198 | 0.72 ± 1.17 | 0.55 ± 0.93 | 0.132 |
Any exacerbation, n (%) | 41 (54.7) | 301 (59.3) | 0.452 | 168 (61.5) | 133 (56.6) | 0.399 |
Frequent exacerbator, n (%) | 4 (5.3) | 47 (9.3) | 0.288 | 32 (11.7) | 15 (6.4) | 0.056 |