PI3 and inflammatory bowel disease: In children with IBD, serum elafin was significantly elevated (mean ± SD: 4.192 ± 1.424 ng/mL) compared with that in the control group (mean ± SD: 3.029 ± 1.366 ng/mL) as presented in Figure 1 (Z = −3.46; p = 0.0005).