Table 1.

Comparison of respiratory signs and symptoms among study groups

Symptoms/signs	Exposed group	Unexposed group	P-value
Cough	42	26	0.03
Sputum	12	4	0.04
Dyspnea	28	16	0.04
Cough + sputum	9	2	0.03
Cough + dyspnea	19	11	0.11
Sputum + dyspnea	16	3	<0.001
Sputum + dyspnea + cough	7	2	0.12
Whizzing	18	7	0.02
Crackle	3	2	0.68
Rhonchi	2	1	0.62