Table 3. T-Test between R Squared of the variables analyzed in intra-uterine growth retarded (IUGR) and appropriate for gestational age (AGA) newborns.

Variable	R^2 between IUGR and AGA	Test-T (p)
GEST AGE	0.26	0.3707
PRO	0.00	0.3422
mRNA_BP1	0.05	0.1384
mRNA_BP2	0.08	0.1882
mRNA_IL6	0.17	0.0386*
mRNA_IGFI	0.17	0.0386*
mRNA_IGF2	0.02	0.3383
PLA_IGF2	0.21	0.1066
PLATNF	0.12	0.1485
PLAIL6	0.10	0.0537*
PLA_BP2	0.03	0.337

Gest Age: gestational age (week); PRO: total protein content per mg of placental tissue (μg/mg); mRNA_BP1: IGF Binding Protein-1 relative gene expression; mRNA_BP2: IGF Binding Protein-2 relative gene expression; mRNA_IL6: Interleukin-6 relative gene expression; mRNA_IGF1: Insulin-like growth factor-1 relative gene expression; mRNA_IGF2: Insulin-like growth factor-2 relative gene expression; PLA_IGF2: Insulin-like growth factor-2 normalized placental lysate concentration (ng/mg); PLATNF: Tumor Necrosis Factor-α normalized placental lysate concentration (ng/mg); PLAIL6: Interleukin-6 normalized placental lysate concentration (ng/mg); PLA_BP2: IGF Binding Protein-2 normalized placental lysate concentration (ng/mg).

*p<0.05.