PP13 and PAPP-A in the First and Second Trimesters: Predictive Factors for Preeclampsia?

Table 6

Results of logistic regression analysis for two markers of preeclampsia in two time sessions, first and second trimesters (4 variables in sum).

Model	Constant	PAPPA coefficient; (95% CI)	PP13 coefficient; (95% CI)	PAPPA coefficient; (95% CI)	PP13 coefficient; (95% CI)	Chi-square; (𝑃 value)
Four variables Simultaneously	24.534	−0.979; (−1.578–0.380)	−0.087; (−0.131–0.043)	−0.064; (−0.107–0.020)	−0.026; (−0.037–0.015)	178.04; (<0.0001)