TY - JOUR
T1 - The stillbirth classification system for the safe passage study
T2 - Incorporating mechanism, etiology, and recurrence
AU - PASS Network
AU - Boyd, Theonia K.
AU - Wright, Colleen A.
AU - Odendaal, Hein J.
AU - Elliott, Amy J.
AU - Sens, Mary Ann
AU - Folkerth, Rebecca D.
AU - Roberts, Drucilla J.
AU - Kinney, Hannah C.
N1 - Publisher Copyright:
© Society for Pediatric Pathology, 2017 All rights reserved.
PY - 2017/4
Y1 - 2017/4
N2 - Objective: Describe the classification system for assigning the cause of stillbirth in the Safe Passage Study, an international, multi-institutional, prospective analysis conducted by the NIAAA/NICHD-funded Prenatal Alcohol in SIDS and Stillbirth (PASS) Research Network. The study mission is to determine the role of prenatal alcohol and/or cigarette smoke exposure in adverse pregnancy outcomes, including stillbirth, in a high-risk cohort of 12,000 maternal/fetal dyads. Methods: The PASS Network classification system is based upon 5 ‘‘sites of origin’’ for cause of stillbirth, further subdivided into mechanism subcategories; both are employed to assign an ultimate cause of death. Each PASS stillbirth was assigned a cause of death and status of sporadic versus recurrent. Adjudication involved review of maternal and obstetrical records; fetal autopsy and placental findings; and required complete consensus in each case. Two published classification systems, ie, INCODE and ReCoDe, were used for comparison. Results: Causes of stillbirth classified were fetal (26%), placental (53%), external (5%), and undetermined (16%). Nine cases (47%) had placental causes of death due to maternal disorders that carry recurrence risks. There was full agreement for cause of death across the 3 classification systems in 26% of cases and partial agreement among them in 42% of cases. Conclusions: The proposed PASS schema employs a user-friendly classification that provides comparable information to previously published systems. Advantages include its simplicity, mechanistic formulations, tight clinicopathologic integration, provision for an undetermined category, and its wide applicability to perinatal mortality review boards with access to information routinely collected during clinicopathologic evaluations.
AB - Objective: Describe the classification system for assigning the cause of stillbirth in the Safe Passage Study, an international, multi-institutional, prospective analysis conducted by the NIAAA/NICHD-funded Prenatal Alcohol in SIDS and Stillbirth (PASS) Research Network. The study mission is to determine the role of prenatal alcohol and/or cigarette smoke exposure in adverse pregnancy outcomes, including stillbirth, in a high-risk cohort of 12,000 maternal/fetal dyads. Methods: The PASS Network classification system is based upon 5 ‘‘sites of origin’’ for cause of stillbirth, further subdivided into mechanism subcategories; both are employed to assign an ultimate cause of death. Each PASS stillbirth was assigned a cause of death and status of sporadic versus recurrent. Adjudication involved review of maternal and obstetrical records; fetal autopsy and placental findings; and required complete consensus in each case. Two published classification systems, ie, INCODE and ReCoDe, were used for comparison. Results: Causes of stillbirth classified were fetal (26%), placental (53%), external (5%), and undetermined (16%). Nine cases (47%) had placental causes of death due to maternal disorders that carry recurrence risks. There was full agreement for cause of death across the 3 classification systems in 26% of cases and partial agreement among them in 42% of cases. Conclusions: The proposed PASS schema employs a user-friendly classification that provides comparable information to previously published systems. Advantages include its simplicity, mechanistic formulations, tight clinicopathologic integration, provision for an undetermined category, and its wide applicability to perinatal mortality review boards with access to information routinely collected during clinicopathologic evaluations.
KW - Autopsy
KW - Human fetus
KW - Placenta
KW - Prenatal alcohol exposure
KW - Prenatal cigarette smoking exposure
KW - Undetermined stillbirth
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U2 - 10.1177/1093526616686251
DO - 10.1177/1093526616686251
M3 - Article
C2 - 28326963
AN - SCOPUS:85027191598
SN - 1093-5266
VL - 20
SP - 120
EP - 132
JO - Pediatric and Developmental Pathology
JF - Pediatric and Developmental Pathology
IS - 2
ER -