Statistical methods
PNAC, cholestasis
VERY LOW BIRTH WEIGHT INFANT, CHOLESTASIS
SPSS 22.0 software was used for statistical analysis. Enumeration data were expressed as rates (%) and comparisons between groups were made using the 
VPI, very preterm infant; VLBWI, very low birth weight infant; MCT, medium-chain triglycerides; LCT, long-chain triglycerides; PNAC, parenteral nutrition associated cholestasis