Twin Peaks: A spatial and temporal study of twinning rates in Brazil

PloS One
Augusto César Cardoso-Dos-SantosLavínia Schuler-Faccini

Abstract

Twin births are an important public health issue due to health complications for both mother and children. While it is known that contemporary factors have drastically changed the epidemiology of twins in certain developed countries, in Brazil, relevant data are still scarce. Thus, we carried out a population-based study of live births in spatial and temporal dimensions using data from Brazil's Live Birth Information System, which covers the entire country. Over 41 million births registered between 2001 and 2014 were classified as singleton, twin or multiple. Twinning rates (TR) averaged 9.41 per 1,000 for the study period and a first-order autoregressive model of time-series analysis revealed a global upward trend over time; however, there were important regional differences. In fact, a Cluster and Outlier Analysis (Anselin Local Moran's I) was performed and identified clusters of high TR in an area stretching from the south of Brazil's Northeast Region to the South Region (Global Moran Index = 0.062, P < 0.001). Spearman's correlation coefficient and a Wilcoxon matched pairs test revealed a positive association between Human Development Index (HDI) and TRs in different scenarios, suggesting that the HDI might be an important ...Continue Reading

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Citations

Mar 17, 2020·Journal of Biosocial Science·Augusto César Cardoso-Dos-SantosLavinia Schuler-Faccini
Jan 31, 2019·Twin Research and Human Genetics : the Official Journal of the International Society for Twin Studies·Noelia GómezEmma Otta

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