Tab. 5.

Comparison of clinical symptoms between the study groups.

	Frequency	CVE group			Control group			p-Value
		Pre-trial	Post- trial	p- value	Pre-trial	Post- trial	p- value	pre- trial	post- trial
Coughing	Almost every day	47.8%	3.5%		59.2%	13.8%
	A few days a week	21.8%	25.0%		10.2%	6.8%
	A few days a month	6.5%	10.7%		6.1%	10.3%
	Only with lung/respiratory infections			<0.001			<0.001	0.66	0.35
		21.8%	35.7%		20.4%	27.5%
	Not at all	2.2%	25.0%		4.1%	41.3%
Shortness of breath	Almost every day	73.9%	10.7%		67.3%	13.7%
	A few days a week	17.3%	25.0%		20.4%	10.3%
	A few days a month	2.2%	17.8%		6.1%	27.6%
	Only with lung/respiratory infections			<0.001			<0.001	0.49	0.70
		4.3%	21.4%		6.1%	20.6%
	Not at all	2.2%	25.0%		0.0%	27.6%
Wheezing	Almost every day	84.7%	4.3%		63.2%	6.8%
	A few days a week	8.6%	42.8%		18.3%	13.7%
	A few days a month	4.3%	8.6%		4.1%	24.1%
	Only with lung/respiratory infections			<0.001			<0.001	0.01	0.07
		2.1%	4.3%		8.1%	10.3%
	Not at all	0.0	17.3		6.1	44.8
Sputum brought up	Almost every day	47.8	3.5		59.2	24.1
	A few days a week	21.8	7.1		10.2	17.24
	A few days a month	6.5	10.7		6.1	6.8
	Only with lung/respiratory infections			<0.001			<0.001	0.50	0.02
		21.8	57.1		20.4	37.9
	Not at all	2.2	21.4		4.1	13.7