Table 5. Odds ratio and 95% confidence intervals for the association between active tobacco smoking and rhinitis by sensitization status.

		Non sensitized adults				Sensitized adults
		N	Model 1	Model 2	Model 3	N	Model 1	Model 2	Model 3	p-interaction*
Never		1136	1	1	1	1036	1	1	1
Ever		585	1.21	1.2	1.12	397	1.05	1.07	1
			(1.00–1.47)	(0.97–1.50)	(0.91–1.38)		(0.75–1.46)	(0.77–1.47)	(0.72;1.41)
Current
	10–143	237	0.96	1.29	1.15	205	0.62	0.63	0.69
			(0.71–1.27)	(0.88–1.88)	(0.83–1.59)		(0.40–0.95)	(0.42–0.96)	(0.46–1.02)
	144–284	223	1.18	1.29	1.35	154	0.85	0.88	0.96
			(0.83–1.70)	(0.88–1.88)	(0.88–2.07)		(0.51–1.43)	(0.52–1.49)	(0.57–1.61)
	≥285	209	2.06	2.29	2.47	157	0.74	0.77	0.78
			(1.24–3.43)	(1.17–1.88)	(1.44–4.23)		(0.48–1.15)	(0.93–1.43)	(0.54–1.11)
p-trend			0.02	<0.01	<0.01		0.09	0.09	0.13	<0.01

*P interaction base on model 3