Fig. 1From: Influence of different regimens of volumetric therapy on perioperative intestinal flora in the surgical patients with pancreas tumor, a randomized controlled trial studya Preoperative comparison of OTU level between the two groups. PCA1 is the significance of the sample in the first principal component (abscissa); PCA2 is the significance of the sample on the second principal component (ordinate). The P value represents the significance of the sample in this principal component. b Postoperative comparison of OTU level between the two groups. PCA1 is the significance of the sample in the first principal component (abscissa); PCA2 is the significance of the sample on the second principal component (ordinate)Back to article page