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Table 1 Original versus Extended fullPIERS Logistic Regression Equations for the prediction of adverse maternal outcomes from pre-eclampsia

From: Placental growth factor for the prognosis of women with preeclampsia (fullPIERS model extension): context matters

Original fullPIERS Logistic Regression Equation Extended fullPIERS Logistic Regression Equation
logit (pi) = 2·68 + (− 5·41 × 10− 2; gestational age at eligibility) + 1·23(chest pain or dyspnea)+
(− 2·71 × 10− 2; creatinine) + (2·07 × 10− 1; platelets) + (4·00 × 10− 5; platelets2)+
(1·01 × 10− 2; aspartate transaminase (AST))+
(− 3·05 × 10− 6; AST2) + (2·50 × 10− 4; creatinine×platelet) + (− 6·99 × 10− 5; platelet×AST) + (− 2·56 × 10− 3; platelet×SpO2)
logit (pi) = − 1.34 + (0.25 × fullPIERS model linear predictor) + (− 0.01 × PlGF)
Odds ratio (adverse maternal outcome) = 0.26 + (1.28 × fullPIERS model linear predictor [95% CI 1.23–1.33]) + (0.99 × PlGF [95% CI 0.98–0.99])