TABLE 2.

Prevalence ratio estimates and 95% confidence intervals for the association between allergic sensitization, rhinitis and tobacco smoke exposure by serum cotinine tertiles^*

		Any allergic sensitization			Inhaled allergen sensitization			Food allergen sensitization			Rhinitis self-report
	n	Model 1	Model 2	Model 3	Model 1	Model 2	Model 3	Model 1	Model 2	Model 3	Model 1	Model 2	Model 3
Unexposed	487	1	1	1	1	1	1	1	1	1	1	1	1
SHS
0.011–0.038	611	0.87 (0.71–1.07)	0.86 (0.71–1.06)	0.85 (0.70–1.05)	0.84 (0.64–1.11)	0.83 (0.63–1.09)	0.82 (0.62–1.07)	0.93 (0.67–1.29)	0.93 (0.67–1.29)	0.90 (0.65–1.25)	0.85 (0.54–1.33)	0.85 (0.54–1.33)	0.87 (0.58–1.31)
0.039–0.182	622	1.06 (0.86–1.30)	1.05 (0.86–1.29)	1.02 (0.83–1.24)	1.08 (0.85–1.40)	1.07 (0.84–1.36)	1.03 (0.82–1.30)	1.07 (0.81–1.42)	1.07 (0.81–1.41)	0.98 (0.74–1.31)	1.02 (0.72–1.45)	1.02 (0.72–1.45)	1.10 (0.82–1.45)
0.183–10	664	0.91 (0.75–1.09)	0.91 (0.76–1.09)	0.85 (0.71–1.02)	0.88 (0.70–1.10)	0.88 (0.71–1.10)	0.82 (0.67–1.00)	0.71 (0.53–0.96)	0.72 (0.54–0.96)	0.61 (0.43–0.85)	0.97 (0.69–1.36)	0.97 (0.69–1.36)	1.12 (0.85–1.49)
p trend		0.63	0.5	0.97	0.7	0.53	0.98	0.11	0.13	0.03	0.2	0.2	0.05
Active smoking
0.011–25.9	130	1.13 (0.87–1.47)	1.06 (0.83–1.34)	1.05 (0.83–1.34)	1.19 (0.87–1.63)	1.03 (0.76–1.40)	1.02 (0.76–1.38)	0.84 (0.48–1.48)	0.90 (0.48–1.66)	0.87 (0.46–1.62)	1.05 (0.64–1.70)	1.01 (0.64–1.59)	1.09 (0.69–1.72)
26–120	108	1.11 (0.83–1.50)	1.04 (0.75–1.44)	1.06 (0.76–1.46)	1.14 (0.82–1.58)	0.99 (0.76–1.40)	1.00 (0.71–1.42)	0.98 (0.56–1.74)	1.05 (0.53–2.10)	1.03 (0.51–2.05)	1.15 (0.77–1.73)	1.10 (0.68–1.79)	1.24 (0.82–1.87)
≥121	92	0.99 (0.68–1.42)	0.94 (0.64–1.36)	0.96 (0.68–1.35)	1.02 (0.71–1.46)	0.89 (0.63–1.27)	0.91 (0.66–1.25)	0.82 (0.47–1.43)	0.90 (0.52–1.57)	0.86 (0.54–1.37)	1.56 (1.06–2.31)	1.49 (0.95–2.32)	1.73 (1.23–2.43)
p trend		0.55	0.59	0.66	0.47	0.5	0.57	0.96	0.98	0.99	0.1	0.11	0.05

^*Values are prevalence ratio (95% confidence interval).

SHS = second-hand smoke.