• Lushun Ma, Xinyuan Pang, Guofeng Ji, Xinrui Ma, Jie Li, Yuan Chang, and Chong Ma.
• Department of Gastrointestinal and Colorectal Surgery, China-Japan Union Hospital of Jilin University, Changchun, Ji Lin, China.
• Medicine (Baltimore). 2021 Oct 22; 100 (42): e27551e27551.

BackgroundThe neutrophil to lymphocyte ratio (NLR) may be a potential biomarker to evaluate the condition of ulcerative colitis (UC), but whether it can determine the activity of UC is still controversial. So we conducted this meta-analysis to study the relationship between them.MethodsWe searched the databases of Pubmed, Embase, Cochrane, Wanfang, and CNKI to collect qualified articles. Random effect or fixed effect model is used to calculate the standard mean difference (SMD) with 95% confidence interval (CI).ResultsA total of 11 articles (including 1741 participants) were included in this meta-analysis. The results showed that the level of NLR in peripheral blood of patients with UC was significantly higher than that of control group (SMD = 1.04, 95% CI = 0.71-1.36). The NLR value of active patients was significantly higher than that of inactive patients (SMD = 1.35, 95% CI = 0.87-1.83).ConclusionNLR may be a useful index to determine the severity and activity of UC, and it is expected to be widely used in clinical practice in the future.Copyright © 2021 the Author(s). Published by Wolters Kluwer Health, Inc.

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