| AUC | Area Under the Receiver Operating Characteristic Curve |
| BMI | Body Mass Index |
| CI | Confidence Interval |
| ECI | Estimated Calibration Index |
| GABD | Gestational Age at Blood Draw |
| IGFBP4 | Insulin-like Growth Factor Binding Protein 4 |
| LOS | Length of (Hospital) Stay |
| LR | Likelihood Ratio |
| NICU | Neonatal Intensive Care Unit |
| NNLOS | Neonatal Length of (Hospital) Stay |
| NNS | Number Needed to Screen |
| NPV | Negative Predictive Value |
| PAPR | Proteomic Assessment of Preterm Birth |
| PE | Preeclampsia |
| PPV | Positive Predictive Value |
| PTB | Preterm Birth |
| SD | Standard Deviation |
| SHBG | Sex Hormone Binding Globulin |
| sPTB | Spontaneous Preterm Birth |