Table 4.
Accuracy of small-for-gestational-age fetuses with sonographic diagnosis of fetal growth restriction (Hadlock formula)
| Statistical parameter | Value | 95% confidence interval | p |
|---|---|---|---|
| Reference population: Canadian Perinatal Surveillance System singleton growth curves [17] | |||
| Odds ratio | 34.7 | 7.3–226.4 | < 0.001 |
| Sensitivity (%) | 24.2 | 14.5–36.4 | |
| Specificity (%) | 99.1 | 96.7–99.9 | |
| Positive predictive value (%) | 88.9 | 65.3–98.6 | |
| Negative predictive value (%) | 81.3 | 76.1–85.8 | |
| Reference population: German Percentile Values for the Anthropometric Dimensions of Triplet Neonates [18] | |||
| Odds ratio | 1733.4 | 15.3–111,665.8 | < 0.001 |
| Sensitivity (%) | 26.3 | 12.7–41.2 | |
| Specificity (%) | 100.0 | 98.1–100.0 | |
| Positive predictive value (%) | 100.0 | 62.8–100.0 | |
| Negative predictive value (%) | 89.2 | 84.7–92.5 | |