IL6 and Sepsis: There was still no association between IL-6 and birth weight (R=0.01, P=0.96), but the association between leptin and IL-6 was strengthened when the analysis was restricted to appropriate for gestational age infants without sepsis (N=67, R=0.56, P<0.001, Figure 1) or infants without sepsis with birth weights at the 25th to 75th percentile (N=34, R=0.71, P<0.001).