Characteristics of the Included Studies
We identified a total of 162 articles through database search (Figure 1 presents the flow chart of the study selection process). After screening, 10 articles were finally included. Among them, 8 articles (438 CD patients and 358 healthy controls) and 9 articles (391 UC patients and 438 healthy controls) have studied the serum resistin levels. Table 1 presents the basic characteristics of the enrolled studies.