Table 2

Plasma cotinine, urine cotinine plus 3-hydroxycotinine (COT + 3HC) and urine total 4-(methylnitrosoamino)-(3-pyridyl)1-butanol (NNAL) at baseline (BL), maximum concentration (C_max) and maximum change (Δ_max) following 1 h exposure to secondhand smoke in a vehicle

	Plasma cotinine (ng/ml)			Urine cotinine (ng/ml)			Urine COT+3HC (nmol/mg creat)			Urine total NNAL (pg/mg creat)
Subject	BL	C_max	Δ_max	BL	C_max	Δ_max	BL	C_max	Δ_max	BL	C_max	Δ_max
1	0	0.17	0.17	0.09	1.11	1.02	0.002	0.016	0.014	0	1.27	1.27
2	0.07	0.20	0.13	0.19	2.52	2.32	0.003	0.015	0.012	0	2.62	2.62
3	0.06	0.21	0.15	0.88	3.69	2.80	0.016	0.039	0.023	0	4.05	4.05
4	0.05	0.13	0.08	0.21	1.04	0.83	0.004	0.014	0.010	0	1.20	1.20
5	0.06	0.12	0.06	0.21	0.90	0.63	0.002	0.010	0.008	0	4.92	4.92
6	0	0.28	0.28	0.41	2.92	2.51	0.007	0.032	0.024	0.48	3.51	3.03
7	0.06	0.16	0.10	0.52	6.00	5.48	0.008	0.068	0.060	0	2.23	2.23
8	0.04	0.12	0.07	0.48	1.10	0.61	0.006	0.010	0.004	0.32	1.65	1.33
Average	0.04	0.17	0.13	0.38	2.41	2.03	0.006	0.025	0.019	0.10	2.68	2.58
SD	0.03	0.06	0.07	0.25	1.79	1.66	0.005	0.020	0.018	0.19	1.36	1.37

creat, creatinine.