Does inflammatory bowel disease coexist with systemic lupus erythematosus?

Area of Science:

• Rheumatology
• Gastroenterology
• Epidemiology

Background:

• The association between inflammatory bowel disease (IBD) and systemic lupus erythematosus (SLE) is infrequently reported, primarily through case studies.
• Existing data suggests a rare link, necessitating further investigation into the prevalence and nature of this comorbidity.

Purpose of the Study:

• To investigate the epidemiological association between inflammatory bowel disease (IBD) and systemic lupus erythematosus (SLE).
• To determine if patients with SLE have a higher prevalence of ulcerative colitis (UC) and Crohn's disease (CD) compared to the general population.

Main Methods:

• A case-control study design was employed, comparing patients with SLE to age- and sex-matched controls.
• Prevalence of UC and CD was assessed using univariate analysis (chi-square and t-tests) and multivariate logistic regression models.
• Data was sourced from the medical database of Clalit Health Services.

Main Results:

• The study included 5018 SLE patients and 25,090 controls.
• Univariate analysis showed a higher prevalence of UC (0.4% vs 0.2%) and CD (0.7% vs 0.3%) in SLE patients (p<0.017 and p<0.001, respectively).
• Multivariate analysis confirmed a significant association between SLE and Crohn's disease (OR 2.23, 95% CI 1.46-3.4, p<0.001), but not ulcerative colitis (OR 1.67, 95% CI 0.99-2.815, p<0.052).

Conclusions:

• Patients with SLE exhibit a significantly greater prevalence of Crohn's disease.
• Distinguishing gastrointestinal involvement in SLE from IBD can be clinically challenging due to similar presentations.
• Healthcare providers should consider the potential comorbidity of SLE and CD in patient management.