Table 2.
Overview of predictors
| Theme | Predictor | # times reported (n=78) |
| Laboratory test | Blood biochemistry tests (eg, PAPP-A, triglycerides, β-hCG and uric acid) | 16 |
| Ultrasonography | 3 | |
| Urine dipstick | 2 | |
| Blood pressure | 2 | |
| Oxygen saturation | 1 | |
| Maternal characteristics | Parity | 5 |
| Age | 5 | |
| Body mass index | 3 | |
| Household monthly income | 2 | |
| Occupation | 1 | |
| Method of contraception | 1 | |
| Skin colour | 1 | |
| Educational level | 1 | |
| Oligomenorrhoea | 1 | |
| Comorbidity | 1 | |
| Place of residence | 1 | |
| Increase of acanthosis nigricans | 1 | |
| Family history of diabetes | 1 | |
| Weight accrual rate | 1 | |
| Previous pregnancy characteristics | Previous adverse pregnancy outcome (eg, PPH, macrosomia, stillbirth, preterm) | 5 |
| Interbirth interval | 1 | |
| Current pregnancy characteristics | Gestational age | 5 |
| Number of antenatal visits | 3 | |
| Bleeding | 2 | |
| Chest pain/dyspnoea | 2 | |
| Cervical glandular area | 1 | |
| Umbilical cord complication | 1 | |
| Cervical length | 1 | |
| Antenatal hospitalisation related to current pregnancy | 1 | |
| Labour augmentation | 1 | |
| Headache/visual changes | 1 | |
| Retained placenta | 1 | |
| Length of first and second stage of labour | 1 | |
| Neonatal characteristics | Presentation | 1 |
| Birth weight | 1 | |
| Apgar score | 1 |
hCG, human chorionic gonadotropin; PAPP-A, pregnancy-associated plasma protein A.