Multivariate analyses resulting from the standard 1D 500 MHz ¹H NMR spectra from FT and VLBW preterm deliveries.

<p>(A): PCA scores plot resulting from the analysis of maternal plasma. (B): PLS-DA scores plot resulting from the analysis of arterial umbilical cord plasma and validation by permutation test (C). (C): R²(X) = 0.366, R²(Y) = 0.695 and Q²(Cum) = 0.676. The model has been validated by a permutation test (n = 20). R² intercept is at 0.495 and Q² intercept is at −0.212.