Exposure to Secondhand Tobacco Smoke at Airport Terminals

Table 3

Results of multiple linear regression analysis of cigarette and vehicle counts on PM2.5 measurements by location of designated smoking areas. Terminal 4 featured designated smoking areas immediately outside pedestrian entrances, while smoking areas at terminal 5 were located over 20 meters across the terminal road. β is the standardized beta coefficient.

	β	95% CI lower	95% CI upper	R^2
Terminal 4				0.70	<0.001
Lit cigarettes/min	0.83	0.55	1.11	0.66	<0.001
Vehicles/min	0.20	−0.08	0.49	0.01	0.15
Terminal 5				0.26	0.08
Lit cigarettes/min	0.36	−0.08	0.80	0.14	0.1
Vehicles/min	0.35	−0.09	0.79	0.13	0.1