Table 5.

Relationship between smoking habit and all patients with primary sclerosing cholangitis (PSC) stratified according to time from diagnosis to completion of questionnaire, 0–6 years (n=50), 7–12 years (n=56), and >12 years (n=64)

Time from diagnosis to completion of questionnaire	Smoking habit	PSC	Controls*	Odds ratio†	95% CI	p Value
0–6 y	Never	34 (68%)	20 (40%)	1.0
	Ever	16 (32%)	30 (60%)	0.31	0.13–0.77	<0.01
	Former	14 (28%)	18 (36%)	0.46	0.17–1.22	0.1
	Current	2 (4%)	12 (24%)	0.1	0.01–0.54	<0.01
7–12 y	Never	37 (66%)	22 (39%)	1.0
	Ever	19 (34%)	34 (61%)	0.33	0.14–0.77	<0.05
	Former	16 (29%)	20 (36%)	0.48	0.19–1.2	0.1
	Current	3 (5%)	14 (25%)	0.13	0.03–0.55	<0.01
>12 y	Never	41 (64%)	24 (37%)	1.0
	Ever	23 (36%)	40 (63%)	0.34	0.15–0.73	<0.01
	Former	16 (25%)	23 (36%)	0.41	0.17–0.99	<0.05
	Current	7 (11%)	17 (27%)	0.24	0.08–0.73	<0.01

*Controls matched to PSC patients in terms of age/sex/locality.

†Odds of having PSC relative to never smokers.