Table 1

Cotinine (ng/mL)	Healthy		Asthma and/or hay fever
	n	Geometric mean (95% CI) (ppb)	n	Geometric mean (95% CI) (ppb)
<0.02	2868	15.0 (14.7-15.4)	226	19.7 (18.0-21.5)**
0.03 - 0.05	2547	15.4 (15.0-15.8)	207	18.2 (16.6-19.9)**
0.06 - 11.10	2669	14.7 (14.3-15.0)	241	18.2 (16.5-20.0)**
>11.11	2668	8.8 (8.6-9.1)#	251	9.9 (9.0-10.9)#*