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

Table 5

Results of logistic regression analysis for two markers of preeclampsia in two time sessions, first and second trimesters.

Model	Constant	PAPPA coefficient; (95% CI)	PP13 coefficient; (95% CI)	Likelihood ratio PAPPA; (95% CI)	Likelihood ratio PP13; (95% CI)	Chi-square; (𝑃 value)
First trimester	10.958	−1.060; (−1.566–0.553)	−0.100; (−0.133–0.067)	0.347; (0.209–0.575)	0.905; (0.875–0.935)	136.1; (𝑃<0.001)
Second trimester	18.033	−0.0915; (−0.1277–0.0553)	−0.0262; (−0.0346–0.179)	0.913; (0.880–0.946)	0.974; (0.966–0.982)	138.9; (𝑃<0.001)