Table 3

Levels of thirdhand smoke pollutants on surfaces in hotel hallways outside of guestrooms

	Hotels with complete smoking bans	Hotels without complete smoking bans
	Hallway outside non-smoking rooms	Hallway outside non-smoking rooms	Hallway outside smoking rooms
Surface nicotine (μg/m²)	N=10	N=30	N=29
Geomean	1.2 (.01;3.6)^A ^B	2.8 (1.5;4.8)^A	9.3 (4.5;18.4)^B
Minimum	0.0	0.0	0.0
First quartile	0.0	0.2	2.5
Median	0.4	2.2	7.3
Third quartile	2.7	8.1	32.2
Maximum	27.4	45.6	313.4
Surface 3EP (μg/m²)	N=10	N=30	N=29
Geomean	0.3 (0;0.8)	0.1 (0.0;0.2)	0.31 (0.05;0.64)
Minimum	0.0	0.0	0.0
First quartile	0.0	0.0	0.0
Median	0.2	0.0	0.0
Third quartile	0.7	0.2	0.2
Maximum	2.3	1.2	11.0

Matching superscripts show statistically significant mean differences. A p<0.05; B and C p<0.01.
3EP, 3-ethynylpyridine.