| Abbreviation | Full Term |
| AB therapy | Antibiotic Therapy |
| aOR | Adjusted Odds Ratio |
| AUC | Area Under the Curve |
| CI | Confidence Interval |
| CRP | C-Reactive Protein |
| ELISA | Enzyme-Linked Immunosorbent Assay |
| EMA | European Medicines Agency |
| EOS | Early-Onset Sepsis |
| HIE | Hypoxic-Ischemic Encephalopathy |
| IL-6 | Interleukin-6 |
| IL-27 | Interleukin-27 |
| I/T ratio | Immature-to-Total Neutrophil Ratio |
| IVH | Intraventricular Hemorrhage |
| NICU | Neonatal Intensive Care Unit |
| NPV | Negative Predictive Value |
| OR | Odds Ratio |
| PCR | Polymerase Chain Reaction |
| PCT | Procalcitonin |
| PPV | Positive Predictive Value |
| ROM | Rupture of Membranes |
| SD | Standard Deviation |
| Se | Sensitivity |
| SGA | Small for Gestational Age |
| Sp | Specificity |
| WBC | White Blood Cells |