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KMID : 0361720150260030229
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Korean Journal of perinatology
2015 Volume.26 No. 3 p.229 ~ p.236
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The Discordance of Intra-twin Birth Weight by Infantile Gender and Birth Order in Korea; 2008-2013
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박상화:Park Sang-Hwa
신재준:Shin Jae-Jun/김훈:Kim Hoon/임달오:Lim Dar-Oh
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Abstract
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Purpose: To investigate the incidence of intra-twin birth weight discordance and its association with infantile gender and birth order.
Methods: We used the data of birth from 2008 to 2013 of Korea Statistics (38,140 pairs of twins). Adjusted logistic regression analyses were performed to describe the birth weight discordance (≥25%) according to infantile gender and birth order (twin A: 1st, twin B: 2nd). Birth weight discordance was calculated as 100 × (birth weight difference/birth weight of the heavier twin).
Results: Twin A (mean 2.431 kg) was heavier than twin B (mean 2.359 kg), and the weight difference was 0.281 kg on average. Overall incidence of birth weight discordance was 8.3 percent. The incidence of discordance was 8.8 percent among unlike-sexed pairs and 8.0 percent among like-sexed pairs. Twins with birth weight A≥B (10.2 percent) showed higher incidence of discordance than twins with birth weight A
Conclusion: Birth weight discordance was associated with unlike-sexed twin pairs and difference of inter-twin birth weight by birth order. However, close attention should be paid to the discordance of twin body weight to reduce the risk of adverse outcome.
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KEYWORD
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Twin birth, Birth weight discordance, Deciles
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