Table 1

Pre-ban and post-ban mean CO level according to venue type and sampled environment

Venue type	Environment
	Closed pre-ban		Closed post-ban		p Value	Semi-opened pre-ban		Semi-opened post-ban		p Value	Open pre-ban		Open post-ban		p Value
	Mean	SD	Mean	SD	p Value	Mean	SD	Mean	SD	p Value	Mean	SD	Mean	SD	p Value
Restaurant	4.01	3.39	1.29	1.66	<0.001	3.49	2.09	1.11	1.06	<0.001	3.16	1.98	1.22	1.30	<0.001
Bar	5.02	4.27	1.35	1.22	<0.001	4.14	3.02	1.21	1.37	<0.001	3.23	1.74	1.43	1.68	<0.001
Nightclub	4.91	3.21	1.30	.82	<0.001	4.01	2.70	1.15	.73	<0.001	3.50	2.33	1.33	0.97	<0.001
Other	4.64	3.94	1.67	2.87	<0.001	3.58	2.32	1.21	1.16	<0.001	3.74	3.23	1.31	1.25	<0.001
Mean value	4.57	3.7	1.35	1.66		3.79	2.49	1.16	1.14		3.31	2.2	1.31	1.39