Fig. 1

Intestinal fatty acid binding protein (IFABP, blue line) and calprotectin (red line) levels by gestational age during the first week of life (N = 112). For IFABP, there was a statistical difference but unclear clinical difference between gestational ages (P = 0.039) given overall low levels. For calprotectin, there was a significant difference between gestational ages (P = 0.004), but not a clear pattern