Table 2 Accuracy analyses to predict SGA newborns. P-value refers to DeLong’s test (AC, abdominal circumference measurement stratified according to Papageorghiou et al. [15]; EFW postnatal standard, estimated fetal weight calculated with the formula proposed by Stirnemann et al. [11] and stratified according to the standard reported by Villar et al. [12, 16]; EFW prenatal standard IG-21, estimated fetal weight calculated with the formula proposed by Stirnemann et al. [11] and stratified according to the standard reported by Stirnemann et al. [11]; EFW prenatal standard Hadlock, estimated fetal weight calculated with the formula proposed by Hadlock et al. [18] and stratified according to the standard reported by Hadlock et al. [19]). It is reported, also the sensitivity at 10% false positive rate (FPR)
Birth-weight centile | Variable | Area under ROC curve % (95% CI) | Sensitivity at 10% FPR % (95% CI) | p value | ||
|---|---|---|---|---|---|---|
AC | EFW postnatal standard | EFW prenatal standard IG-21 | ||||
< 10th | AC | 84.91 (82.33–87.49) | 53.18 (43.18–62.05) | – | ||
EFW postnatal standard | 83.07 (80.37–85.77) | 46.82 (35.91–56.82) | < 0.05 | – | ||
EFW prenatal standard IG-21 | 86.52 (84.15–88.90) | 54.55 (46.82–63.18) | < 0.05 | < 0.05 | – | |
EFW prenatal standard Hadlock | 87.27 (84.96–89.58) | 55.91 (47.27–63.64) | < 0.05 | < 0.05 | 0.190 | |
< 3rd | AC | 88.81 (85.67–91.96) | 56.10 (43.90–68.97) | – | ||
EFW postnatal standard | 86.78 (83.25–90.31) | 56.10 (45.12–68.29) | < 0.05 | – | ||
EFW prenatal standard IG-21 | 89.85 (86.77–92.93) | 64.63 (50.00–78.05) | < 0.05 | < 0.05 | – | |
EFW prenatal standard Hadlock | 89.51 (86.35–92.66) | 59.76 (46.34–71.95) | 0.344 | < 0.05 | 0.562 | |