TABLE 1.

Scoring criteria of clinical symptoms and signs.

	0	1	2	3
Cough	No	Only in the morning	Through the day	Frequent cough through the day
Expectoration	No	10–20 ml through the day	20–30 ml through the day	30 ml and above through the day
Chest tightness	No	Once in a while	Often and post-activity aggravation	Obvious with incidence even rest
Shortness of breath	No	With heavy activity	With light activity	Even rest
Fatigue	No	Light	Moderate	Severe
Cyanosis	No	Light	Moderate	Severe