Table 3: Frequency of respiratory symptoms in the exposed and unexposed groups and their corresponding odds ratios
Symptom	Kitchen workers (n=60)	Comparison group (n=60)	p value	OR (95% CI)
Wheezing	12 (20%)	3 (5%)	0.025	4.8 (1.3 to 17.8)
Shortness of breath	38 (63%)	13 (22%)	<0.001	7.6 (2.3 to 24.7)
Chest tightness	19 (32%)	4 (7%)	0.001	6.2 (2.8 to 14.0)
Cough	17 (28%)	1 (2%)	<0.001	27.3 (3.3 to 224.5)
Chronic cough	9 (15%)	0 (0%)	0.003	3.05 (0.8 to 12.8)
Phlegm	20 (33%)	9 (15%)	0.032	3.5 (0.9 to 14.0)
Chronic bronchitis	12 (20%)	3 (5%)	0.025	5.2 (1.4 to 19.9)