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. 2015 Jul;44(7):969-78.

Two-Year Comparison of Growth Indices of Twins with Dissimilar Weight at Birth (Low Birth Weight vs. Normal Twin)

Fatemeh Atoof  1 , Mohammad Reza Eshraghian  1 , Kazem Mohammad  1 , Alireza Moravveji  2 , Mohammad Reza Sharif  3 , Mahmood Mahmoodi  1
Affiliations

Two-Year Comparison of Growth Indices of Twins with Dissimilar Weight at Birth (Low Birth Weight vs. Normal Twin)

Fatemeh Atoof et al. Iran J Public Health. 2015 Jul.

Abstract

Background: Twin pregnancies are commonly associated with low birth weight (LBW) infants. Most studies focus on growth of LBW compared with normal infants in singleton. However, there has not been any study on twins to compare LBW with normal birth weight (NBW) infants as a match control of the same twin.

Methods: This cohort study was conducted at Healthcare centers of Kashan, in 2013. Twins differing in birth weight (one with LBW and the other with NBW) were assessed using the care charts in Well Care program in regard to weight, height and head circumference measurements at birth and after 6, 12, 24 months of age and were compared separately between all matched pairs and in four sex-twin subgroups which was defined according to the sex of each twin in pairs; SF (Same-sex: Female), SM (Same-sex: Male), LF (LBW: Female) and LM (LBW: Male).

Results: Incidence of dissimilar twins in birth weight was 28.4%. The weight of LBW was significantly lower than the NBW cohort in SF and LF subgroups up to 24 months. The height of LBW was not significantly different from NBW cohort in SM and LM subgroups up to 24 month. Head circumference was significantly higher in LBW compared to NBW cohort in LM subgroup up to 24 month. However, these indices were significantly lower in LBW compared to NBW cohort in all pairs.

Conclusion: Although LBW cohort was significantly lower than the NBW in growth indices at birth to 2 years old in all twins, however, highly variable results was observed in four subgroups of sex-twin.

Keywords: Growth indicator; Low birth weight; Twins.

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Figures

Fig. 1:
Fig. 1:
Study population according to the years of study
Fig. 2:
Fig. 2:
Trends of mean difference of weight (A), height (B) and head circumference (C) between NBW and LBW twin in four sex-twin subgroups from birth to 2 years of age
See this image and copyright information in PMC

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