TABLE 1.

THE WINNIPEG CRITERIA

Type of Exacerbations	Criteria
Type 1	All three of the following symptoms: increase in sputum volume, increase in sputum purulence, increase in shortness of breath
Type 2	Any two of the following symptoms: increase in sputum volume, increase in sputum purulence, increase in shortness of breath
Type 3	Any one of the following symptoms: increase in sputum volume, increase in sputum purulence, increase in shortness of breath, plus at least one of the following: upper respiratory tract infection lasting 5 d, fever; increase in wheezes, increase in cough, increase in heart rate ⩾ 20%