Oral contraceptive use and smoking are risk factors for relapse in Crohn's disease Antje Timmer*, Lloyd R. Sutherland*,‡, Francois Martin§ Gastroenterology Volume 114, Issue 6, Pages 1143-1150 (June 1998) DOI: 10.1016/S0016-5085(98)70419-6 Copyright © 1998 American Gastroenterological Association Terms and Conditions
Fig. 1 Kaplan–Meier survival curves for relapse by smoking status. Gastroenterology 1998 114, 1143-1150DOI: (10.1016/S0016-5085(98)70419-6) Copyright © 1998 American Gastroenterological Association Terms and Conditions
Fig. 2 Kaplan–Meier survival curves for relapse by OC use. Gastroenterology 1998 114, 1143-1150DOI: (10.1016/S0016-5085(98)70419-6) Copyright © 1998 American Gastroenterological Association Terms and Conditions
Fig. 3 Combined effect of smoking and use of OCs. Gastroenterology 1998 114, 1143-1150DOI: (10.1016/S0016-5085(98)70419-6) Copyright © 1998 American Gastroenterological Association Terms and Conditions