Table 1. Baseline Characteristics of participants.

Variable	Category	Grill street vendors	Non-grill street vendors
		Frequency	Percentage (%)	Frequency	Percentage (%)
Age	20 – 29	18	72	13	52
	30 – 39	4	16	8	32
	40 – 59	3	12	4	16
Working Experience	2 years	9	36	8	32
	3 – 4 years	6	24	7	28
	>4 years	10	40	10	40
Exhaled CO level	Green	8	32	10	40
	Orange	7	28	10	40
	Red	10	40	5	20
Pulmonary Function	Normal	1	4	4	16
	Obstructive	0	0	1	4
	Restrictive	14	56	5	20
	Mixed-type	10	40	15	60
Total	25	100	25	100