The journal of obstetrics and gynaecology research · 2013
Associations for birthweight of twin pairs in south India.
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Singh Arati, Singh Anupama, Nirmalan Praveen K
Аннотация
AIM: The aim of this study was to determine the distribution and associations of birthweight in twin pairs among a population of pregnant women in south India.
MATERIAL AND METHODS: This was a retrospective case record analysis of 705 twin pair pregnancies during the period 2008-2012. Associations of birthweight with maternal age, parity, pregnancy-induced hypertension (PIH), gestational diabetes, obesity, chorionicity and sex of the twin pairs was explored using bivariate and multivariate analysis.
RESULTS: The median birthweight (4250 g, interquartile range 3530-4810) of dichorionic twins was significantly higher (P < 0.0001) than monochorionic twins (3880 g, interquartile range 3000-4380). Birthweight was associated with chorionicity (t = 4.04, P < 0.001), obesity (t = 2.44, P = 0.03), nulliparity (t = -2.87, P = 0.004), and PIH (t = -2.11, P = 0.04) in a multivariate linear regression model. Birthweights did not differ significantly between female-male and female-female pairs (t = 0.11, P = 0.81), female-male and male-male pairs (t = -0.62, P = 0.54) or female-female and male-male pairs (t = -0.78, P = 0.43) in a multivariate linear regression model. The highest birthweight of the twin pair did not differ significantly (t = 1.27, P = 0.21) by sex of the twin.
CONCLUSIONS: Birthweight of twins was significantly associated with chorionicity, obesity, PIH and nulliparity in this population. A potential masculinization effect was not found as the total birthweights did not differ significantly by sex of the twin pairs.
MATERIAL AND METHODS: This was a retrospective case record analysis of 705 twin pair pregnancies during the period 2008-2012. Associations of birthweight with maternal age, parity, pregnancy-induced hypertension (PIH), gestational diabetes, obesity, chorionicity and sex of the twin pairs was explored using bivariate and multivariate analysis.
RESULTS: The median birthweight (4250 g, interquartile range 3530-4810) of dichorionic twins was significantly higher (P < 0.0001) than monochorionic twins (3880 g, interquartile range 3000-4380). Birthweight was associated with chorionicity (t = 4.04, P < 0.001), obesity (t = 2.44, P = 0.03), nulliparity (t = -2.87, P = 0.004), and PIH (t = -2.11, P = 0.04) in a multivariate linear regression model. Birthweights did not differ significantly between female-male and female-female pairs (t = 0.11, P = 0.81), female-male and male-male pairs (t = -0.62, P = 0.54) or female-female and male-male pairs (t = -0.78, P = 0.43) in a multivariate linear regression model. The highest birthweight of the twin pair did not differ significantly (t = 1.27, P = 0.21) by sex of the twin.
CONCLUSIONS: Birthweight of twins was significantly associated with chorionicity, obesity, PIH and nulliparity in this population. A potential masculinization effect was not found as the total birthweights did not differ significantly by sex of the twin pairs.