Table 4.
Sensitivity and positive predictive value for conditions of interest among all women who have an outcome (N=2339), inclusive of those admitted/delivered at the primary health center (n=2271) and those referred and have outcome (n=68).
| Phase 1 | Phase 2 | Phase 3 | p‐value | |||||
|---|---|---|---|---|---|---|---|---|
| n1 | % | n1 | % | n1 | % | Phase 2 vs Phase 1 | Phase 3 vs Phase 1 | |
| Sensitivity | ||||||||
| Multiple gestation | 2 | 50.0% | 5 | 50.0% | 3 | 75.0% | ||
| Oligohydramnios | 3 | 33.3% | 4 | 50.0% | 0 | 0.0% | ||
| Placenta previa | 0 | 0.0% | 0 | 0.0% | 0 | 0.0% | ||
| Preterm birth | 35 | 66.0% | 25 | 75.8% | 14 | 93.3% | ||
| Malpresentation | 4 | 17.4% | 7 | 70.0% | 4 | 66.7% | ||
| Abnormal fetal heart rate | 0 | 0.0% | 11 | 55.0% | 6 | 60.0% | ||
| Maternal condition | 38 | 57.6% | 32 | 65.3% | 14 | 73.7% | 0.401 | 0.204 |
| Fetal condition | 3 | 10.0% | 16 | 57.1% | 10 | 62.5% | <0.001 a | <0.001 a |
| Any maternal or fetal condition | 37 | 41.1% | 42 | 60.0% | 21 | 67.7% | 0.018 | 0.010 |
| Positive predictive value | ||||||||
| Multiple gestation | 2 | 33.3% | 5 | 62.5% | 3 | 100.0% | ||
| Oligohydramnios | 3 | 100.0% | 4 | 80.0% | 0 | 0.0% | ||
| Placenta previa | 0 | 0.0% | 0 | 0.0% | 0 | 0.0% | ||
| Preterm birth | 35 | 49.3% | 25 | 56.8% | 14 | 29.2% | ||
| Malpresentation | 4 | 50.0% | 7 | 70.0% | 4 | 100.0% | ||
| Abnormal fetal heart rate | 0 | 0.0% | 11 | 73.3% | 6 | 46.2% | ||
| Maternal condition | 40 | 51.3% | 32 | 60.4% | 15 | 26.3% | 0.304 | 0.004 |
| Fetal condition | 4 | 36.4% | 16 | 69.6% | 10 | 58.8% | 0.135 a | 0.440 a |
| Any maternal or fetal condition | 42 | 49.4% | 45 | 63.4% | 23 | 32.4% | 0.080 | 0.032 |
n1 = # true positives; denominator includes false negatives; n2 = # true positives; denominator includes false positives
a
Fisher’s exact test.