Browsing by Author "Merriam, Audrey"

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    Performance of a Multianalyte 'Rule-Out' Assay in Pregnant Individuals With Suspected Preeclampsia
    (Wolters Kluwer, 2022) Costantine, Maged M.; Sibai, Baha; Bombard, Allan T.; Sarno, Mark; West, Holly; Haas, David M.; Tita, Alan T.; Paidas, Michael J.; Clark, Erin A. S.; Boggess, Kim; Grotegut, Chad; Grobman, William; Su, Emily J.; Burd, Irina; Saade, George; Chavez, Martin R.; Paglia, Michael J.; Merriam, Audrey; Torres, Carlos; Habli, Mounira; Macones, Georges; Wen, Tony; Bofill, James; Palatnik, Anna; Edwards, Rodney K.; Haeri, Sina; Oberoi, Pankaj; Mazloom, Amin; Cooper, Matthew; Lockton, Steven; Hankins, Gary D.; Obstetrics and Gynecology, School of Medicine
    Background: The ability to diagnose preeclampsia clinically is suboptimal. Our objective was to validate a novel multianalyte assay and characterize its performance, when intended for use as an aid to rule-out preeclampsia. Methods: Prospective, multicenter cohort study of pregnant individuals presenting between 280/7 and 366/7 weeks' with preeclampsia-associated signs and symptoms. Individuals not diagnosed with preeclampsia after baseline evaluation were enrolled in the study cohort, with those who later developed preeclampsia, classified as cases and compared with a negative control group who did not develop preeclampsia. Individuals with assay values at time of enrollment ≥0.0325, determined using a previously developed algorithm, considered at risk. The primary analysis was the time to develop preeclampsia assessed using a multivariate Cox regression model. Results: One thousand thirty-six pregnant individuals were enrolled in the study cohort with an incidence of preeclampsia of 30.3% (27.6%-33.2%). The time to develop preeclampsia was shorter for those with an at-risk compared with negative assay result (log-rank P<0.0001; adjusted hazard ratio of 4.81 [3.69-6.27, P<0.0001]). The performance metrics for the assay to rule-out preeclampsia within 7 days of enrollment showed a sensitivity 76.4% (67.5%-83.5%), negative predictive value 95.0% (92.8%-96.6%), and negative likelihood ratio 0.46 (0.32-0.65). Assay performance improved if delivery occurred <37 weeks and for individuals enrolled between 28 and 35 weeks. Conclusions: We confirmed that a novel multianalyte assay was associated with the time to develop preeclampsia and has a moderate sensitivity and negative likelihood ratio but high negative predictive value when assessed as an aid to rule out preeclampsia within 7 days of enrollment.