Fig. 4
From: Chorionicity-associated variation in metabolic phenotype of cord blood in twin
Correlation of birth weight within (weight discordance within larger and smaller co-twin, left column) and between (average birth weight between twin pairs, right column) twin pairs of umbilical cord plasma metabolites detected from DC and MC twins, analyzed using a generalized estimating equation (GEE). The red lines represent the 95% confidence intervals for the correlation of metabolites with weight discordance in the DC umbilical cord plasma. The blue lines represent the 95% confidence intervals for correlating metabolites with weight discordance in MC umbilical cord plasma. The center dotted line in each column indicates 0 correlation; metabolites to the right of the dotted line are positively correlated with weight discordance, whereas metabolites to the left of the dotted line are negatively correlated with weight discordance. In addition, the distance between the metabolites and the dotted line represents the strength of the correlation. Metabolites are classified in accordance with their chemical properties, and only the metabolites significantly correlated with birth weight (p-value < 0.05) are plotted