Shayesteh Jahanfar1, Kenneth Lim2, Eugenia Oviedo-Joekes3. 1. School of Health Sciences, Central Michigan University, Mount Pleasant, MI. Electronic address: jahan2s@cmich.edu. 2. Division of Maternal Fetal Medicine, BC Women's Hospital, Vancouver, BC. 3. School of Population and Public Health, The University of British Columbia, Vancouver, BC.
Abstract
OBJECTIVE: Stillbirth is an important adverse outcome associated with twin pregnancy. We aimed at investigating the association between birth weight discordance (BWD) and stillbirth. METHODS: We carried out two retrospective cohort studies including twin births registered in British Columbia from 2000 to 2010 and a subsample with chorionicity information. Generalized estimating equation models for binary outcome were used to account for the correlation in twin outcomes. RESULTS: The province-based cohort included 12 814 twins. In the nonstratified analysis, an increase in BWD was found to be associated with an increased risk of stillbirth even after accounting for potential confounding factors (13.69; 95% CI 7.32-25.62). In the analysis stratified by fetal growth, the stillbirth rate was determined to be higher in subjects with a BWD ≥30% compared with the reference group. BWD-related stillbirth was dependent on fetal growth, parity, GA, twin size, sex discordance, and chorionicity. A subgroup analysis showed that odds of stillbirth were 5.21 times higher in twins with BWD ≥30% than the reference category (95% CI 2.17-12.47) after adjustment for chorionicity. CONCLUSIONS: In screening twin pregnancies, special attention should be paid to fetal growth, parity, GA, twin size, and chorionicity. Sex discordance is a good proxy for chorionicity when these data are not available.
OBJECTIVE:Stillbirth is an important adverse outcome associated with twin pregnancy. We aimed at investigating the association between birth weight discordance (BWD) and stillbirth. METHODS: We carried out two retrospective cohort studies including twin births registered in British Columbia from 2000 to 2010 and a subsample with chorionicity information. Generalized estimating equation models for binary outcome were used to account for the correlation in twin outcomes. RESULTS: The province-based cohort included 12 814 twins. In the nonstratified analysis, an increase in BWD was found to be associated with an increased risk of stillbirth even after accounting for potential confounding factors (13.69; 95% CI 7.32-25.62). In the analysis stratified by fetal growth, the stillbirth rate was determined to be higher in subjects with a BWD ≥30% compared with the reference group. BWD-related stillbirth was dependent on fetal growth, parity, GA, twin size, sex discordance, and chorionicity. A subgroup analysis showed that odds of stillbirth were 5.21 times higher in twins with BWD ≥30% than the reference category (95% CI 2.17-12.47) after adjustment for chorionicity. CONCLUSIONS: In screening twin pregnancies, special attention should be paid to fetal growth, parity, GA, twin size, and chorionicity. Sex discordance is a good proxy for chorionicity when these data are not available.
Authors: Xiao Song Liu; Xiu Juan Su; Guo Hua Li; Shi Jia Huang; Yang Liu; Han Xiang Sun; Qiao Ling Du Journal: Endocrinology Date: 2022-08-01 Impact factor: 5.051