The association between ulcerative colitis and COVID-19 severity: a systematic review and meta-analysis systematic review.

PURPOSE: After the COVID-19 pandemic, many challenges arose regarding the impact of this disease on people with ulcerative colitis. The aims of this study were to estimate the prevalence, severity, and death consequences of COVID-19 in patients with ulcerative colitis using a systematic review and meta-analysis.

METHODS: This study was conducted using a systematic review and meta-analysis method in the field of prevalence, severity, and clinical consequences of COVID-19 in people with ulcerative colitis worldwide. The search was conducted in international scientific databases, such as Web of Science, PubMed, Scopus, Cochrane Library, and Google Scholar, from the beginning of 2020 to October 2023. The quality of the eligible studies was assessed using the Strobe and Newcastle Ottawa checklists. The data were analyzed using a fixed-effects model in the meta-analysis. Subgroup analysis and meta-regression were performed using STATA version 17.

RESULTS: Nineteen studies with a sample size of 224,520 patients were included in this meta-analysis. The results showed that, in COVID-19 patients with ulcerative colitis, the prevalence of hospitalization, death, COVID-19 severity, and mortality rate in severe patients was 54% (95% CI, 27-80%), 10% (95% CI, 4-16%), 20% (95% CI, 8-34%), 63% (95% CI, 46-80%), respectively. In comparison with the general population, the odds ratio (OR) of hospitalization in patients due to COVID-19 was OR = 1.28 (95% CI, 1.19-1.38, P < 0.001), and the chance of severe COVID-19 was OR = 1.30 (95% CI, 1.22-1.53, P < 0.001).

CONCLUSION: The probability of contracting the severe type of COVID-19 and hospitalization in patients with ulcerative colitis was higher than in the general population.