Table 3.
Predictive importance of key variables
| Variable | Generalized cross-validation (GCV) estimate of error |
|---|---|
| Age at fist pregnancy | 100 |
| Body Mass Index (BMI) | 69.9913 |
| Viral load | 53.1357 |
| Age at first pregnancy | 29.11793 |
| Years of school | 28.06922 |
| Children under 18 months: 1 | 6.261627 |
| Travel time to clinic: 30–60 min | 5.991079 |
| WHO weight loss stage: 3 | 5.981254 |
| Place of delivery 2 | 5.827017 |
| Pregnancy outcome: unknown/not documented | 5.822529 |
| WHO weight loss stage2 | 5.179188 |
| Visits urban clinic | 5.064835 |
| On ARV | 5.025331 |
| Travel time to clinic: 1–2 h | 4.986507 |
| Delivery assistance | 4.309087 |
| Place of delivery 4 | 4.232822 |
| Delivery assistance 4 | 3.88988 |
| Travel time to clinic: > 2 h | 3.462557 |
| WHO weight loss stage: 4 | 2.662623 |
| Delivery assistance 5 | 1.985101 |