Figure 2From: Limited utilization of serologic testing in patients undergoing duodenal biopsy for celiac disease Influence of serology results on number of biopsy sites. Non-duodenal biopsy sites included esophagus, stomach, ileum, and colon. Patients were grouped according to pre-biopsy serology results as described in methods. The frequency of duodenal-only biopsy was significantly higher in patients with positive serology than in other groups (p < 0.01, chi-squared).Back to article page