Table 3 Validity of maternal interview data compared to medical records in the Iowa health in pregnancy study
Variable | Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) | True Positives (N) | False Positives (N) | False Negatives (N) | True Negatives (N) | Kappa |
|---|---|---|---|---|---|---|---|---|---|
Low birthweight | 99.3% | 98.4% | 92.2% | 99.5% | 283 | 24 | 8 | 1488 | 0.94 |
Preterm birth | 99.1% | 99.6% | 99.1% | 99.6% | 539 | 5 | 5 | 1389 | 0.99 |
Post-term birth | 97.5% | 100.0% | 100.0% | 99.6% | 196 | 0 | 5 | 1194 | 0.99 |
Pregnancy weight gain | 98.3% | 100.0% | 100.0% | 3.7% | 1509 | 0 | 26 | 1 | 0.07 |
Vaginal delivery | 97.3% | 97.9% | 99.2% | 93.0% | 1383 | 11 | 39 | 516 | 0.94 |
Male sex | 99.2% | 99.0% | 99.1% | 99.1% | 980 | 9 | 8 | 927 | 0.98 |