Table 2—

Characteristics of unreported and reported exacerbations#

UnreportedReported
Exacerbations466410
Exacerbation rate events·person-yr−11.01 (0.92–1.09)0.95 (0.87–1.04)
Total number of key symptoms1 (1–3)3 (1–3)
Type of key symptoms
 Sputum amount213 (45.7)292 (71.2)
 Sputum colour72 (15.5)268 (65.4)
 Dyspnoea279 (59.9)353 (86.1)
 One symptom388 (83.3)118 (28.8)
 Two symptoms58 (12.4)81 (19.7)**
 Three symptoms20 (4.3)211 (51.5)
Treatment of exacerbations
 Untreated exacerbations373 (80.1)53 (12.9)
 Treated exacerbations93 (19.9)357 (87.1)
  • Data are presented as n, mean (95% CI) or n (%). Data for key symptoms are presented as median (range). #: among all 491 patients. **: p<0.01; : p<0.0001 using generalised estimating equations with each symptom as the dependent variable and the reporting status as the independent variable, and taking into account the potential individual-level clustering effect.