Discordant Twins in King Chulalongkorn Memorial Hospital: 6 Years Review of Incidence and Outcomes
Main Article Content
Abstract
Objective To evaluate incidence and outcome of discordant twins in King Chulalongkorn Memorial Hospital, and assess the relationship between pregnancy outcomes and twin intrapair birth weight differences.
Methods Five hundred and nineteen twin gestations over 20 weeks of gestation during six
year period ending in December 2000 were retrospectively analyzed. Incidence and outcome
of discordant twins were assessed based on birth weight difference more than 20 %. All twin
pairs were stratified subsequently into five categories according to the percent difference of
infant birth weight. The relationship between different categories and the subsequent
pregnancy outcome were assessed. Statistical analysis was done using the Mantel-Haenzel c2
test.
Result Among 519 twin pairs, thirteen patients were identified to have single fetal demise
and two patients were documented to have dead fetuses of both twin pairs. Incidence of
discordant twins was 19.6% and greater birth weight difference was significantly associated
with cesarean section rate (p =0.03). Neonatal mortality, neonatal intensive care admission,
and low APGAR score were all associated with higher birth weight difference. (p < 0.001).
Conclusion Incidence of discordant twins based on the birth weight difference more than 20
percent in King Chulalongkorn Memorial Hospital was 19.6%, which corresponds to other
studies. In our study, we found that trend of poor neonatal outcomes related to high intrapair
birth weight differences.
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