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 |
|---|---|---|---|---|---|---|
| *Controls matched to PSC patients in terms of age/sex/locality. | ||||||
| †Odds of having PSC relative to never smokers. | ||||||
| 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 | |