80 Chapter 4 Figure 5. Nutrient intake in preterm infants in the first six weeks of life. Table 4. Regression analyses of parenteral nutrition as a predictor of IGF-1 levels at 2 weeks postnatal age. Variables B (SE) β p-Value Included variables Constant 1.482 (1.359) 0.281 Percentage parenteral intake on day 8 −0.027 (0.011) −0.234 0.019 Weight on day 8 (grams) 0.004 (0.001) 0.478 <0.001 BPD −1.134 (0.516) −0.233 0.032 Hemodynamic significant PDA −1.350 (0.793) −0.159 0.095 R² = 0.574, p < 0.001; percentage parenteral intake: parental energy intake total energy intake , BPD: bronchopulmonary dysplasia, PDA: persistent ductus arteriosus, IGF-1: insulin-like growth factor 1.
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