TABLE 3.
Logistic regression models for the prediction of adverse perinatal outcome prior to 34 weeks, N = 72.
| Model 1 | ||||||||
| CPR MoM + DV PI MoM + EFW centile + maternal age + parity | ||||||||
| AUC (95% CI) 0.88 (0.78–0.97) | ||||||||
| AIC | 61.6 | Intercept | CPR MoM | DV PI MoM | EFW centile | Maternal age | Parity | |
| p‐value | <0.0001 | p‐value | <0.001 | NS | NS | NS | NS | |
| NPP (%) | 66.7 | Estimate | 488 185 | −503 696 | 0,21 585 | −0,00623 | −0,00391 | −0,12 940 |
| PPP (%) | 88.3 | OR | 0.006 | 1.24 | 0.99 | 0.97 | 0.88 | |
| Model 2 | ||||||||
| CPR MoM + DV PI MoM + EFW centile + maternal age | ||||||||
| AUC (95% CI) 0.88 (0.79–0.97) | ||||||||
| AIC | 59.3 | Intercept | CPR MoM | DV PI MoM | EFW centile | Maternal age | ||
| p‐value | <0.0001 | p‐value | <0.001 | NS | NS | NS | ||
| NPP (%) | 66.7 | Estimate | 496 640 | −507 991 | 0,20 756 | −0,00608 | −0,00725 | |
| PPP (%) | 88.3 | OR | 0.006 | 1.23 | 0.99 | 0.99 | ||
| Model 3 | ||||||||
| CPR MoM + DV PI MoM + EFW centile + parity | ||||||||
| AUC (95% CI) 0.88 (0.79–0.97) | ||||||||
| AIC | 59.2 | Intercept | CPR MoM | DV PI MoM | EFW centile | Parity | ||
| p‐value | <0.0001 | p‐value | <0.001 | NS | NS | NS | ||
| NPP (%) | 66.7 | Estimate | 475 573 | −504 539 | 0,21 519 | −0,00609 | −0,13 400 | |
| PPP (%) | 88.3 | OR | 0.006 | 1.24 | 0.99 | 0.87 | ||
| Model 4 | ||||||||
| CPR MoM + DV PI MoM + EFW centile | ||||||||
| AUC (95% CI) 0.87 (0.78–0.97) | ||||||||
| AIC | 57 | Intercept | CPR MoM | DV PI MoM | EFW centile | |||
| p‐value | <0.0001 | p‐value | <0.001 | NS | NS | |||
| NPP (%) | 66.7 | Estimate | 472 989 | −509 787 | 0,20 625 | −0,00582 | ||
| PPP (%) | 88.3 | OR | 0.006 | 1.23 | 0.99 | |||
| Model 5 | ||||||||
| CPR MoM + DV PI MoM | ||||||||
| AUC (95% CI) 0.87 (0.78–0.96) | ||||||||
| AIC | 55 | Intercept | CPR MoM | DV PI MoM | ||||
| p‐value | <0.0001 | p‐value | <0.001 | NS | ||||
| NPP (%) | 66.7 | Estimate | 476 576 | −528 666 | 0,21 398 | |||
| PPP (%) | 88.3 | OR | 0.0051 | 1.24 | ||||
| Model 6 | ||||||||
| CPR MoM + EFW centile | ||||||||
| AUC (95% CI) 0.88 (0.79–0.97) | ||||||||
| AIC | 54.8 | Intercept | CPR MoM | EFW centile | ||||
| p‐value | <0.0001 | p‐value | <0.001 | NS | ||||
| NPP (%) | 66.7 | Estimate | 499 560 | −512 469 | −0,00588 | |||
| PPP (%) | 88.3 | OR | 0.006 | 0.99 | ||||
| Model 7 | ||||||||
| DV PI MoM + EFW centile | ||||||||
| AUC (95% CI) 0.68 (0.51–0.85) | ||||||||
| AIC | 73.7 | Intercept | DV PI MoM | EFW centile | ||||
| p‐value | <0.05 | p‐value | NS | <0.05 | ||||
| NPP (%) | 50 | Estimate | 0,88 690 | 0,58 415 | −0,02291 | |||
| PPP (%) | 81 | OR | 1.79 | 0.98 | ||||
| Model 8 | ||||||||
| DV PI MoM | ||||||||
| AUC (95% CI) 0.56 (0.40–0.71) | ||||||||
| AIC | 76.2 | Intercept | DV PI MoM | |||||
| p‐value | NS | p‐value | NS | |||||
| NPP (%) | — | Estimate | 0,53 629 | 0,63 787 | ||||
| PPP (%) | 79.2 | OR | 1.89 | |||||
| Model 9 | ||||||||
| EFW centile | ||||||||
| AUC (95% CI) 0.83 (0.72–0.94) | ||||||||
| AIC | 72.7 | Intercept | EFW centile | |||||
| p‐value | <0.0001 | p‐value | <0.05 | |||||
| NPP (%) | 50 | Estimate | 162 739 | −0,02391 | ||||
| PPP (%) | 81 | OR | 0.98 | |||||
| Model 10 | ||||||||
| CPR MoM | ||||||||
| AUC (95% CI) 0.88 (0.79–0.97) | ||||||||
| AIC | 52.9 | Intercept | CPR MoM | |||||
| p‐value | <0.0001 | p‐value | <0.0001 | |||||
| NPP (%) | 66.7 | Estimate | 503 977 | −531 471 | ||||
| PPP (%) | 88.3 | OR | 0.0049 | |||||
| Model 11 | ||||||||
| CPR MoM + EFW centile + parity | ||||||||
| AUC (95% CI) 0.88 (0.79–0.97) | ||||||||
| AIC | 57 | Intercept | CPR MoM | EFW centile | Parity | |||
| p‐value | <0.0001 | p‐value | <0.001 | NS | NS | |||
| NPP (%) | 61.5 | Estimate | 502 893 | −507 038 | −0,00616 | −0,13 068 | ||
| PPP (%) | 88.1 | OR | 0.0063 | 0.99 | 0.88 | |||
Abbreviations: AIC, Akaike information criteria; AUC, area under the curve; CPR MoM, cerebroplacental ratio multiples of the median; DV MoM, ductus venosus pulsatility index multiples of the median; EFW, estimated fetal weight; GA at delivery, gestational age at delivery; NPP, negative predictive power; OR, odds ratio; PPP, positive predictive power.