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  • Title: Sex differences and sustained excess in mortality among discordant twins in Matlab, Bangladesh: 1977-1985.
    Author: Chowdhury MK, Khan NU, Wai L, Bairagi R.
    Journal: Int J Epidemiol; 1990 Jun; 19(2):387-90. PubMed ID: 2376452.
    Abstract:
    This paper reports findings from a study that compared survival of 204 pairs of liveborn twins discordant for sex and a random sample of 2371 singleton live births from the same population in Matlab, Bangladesh during the period 1977-1985. The discordant twins showed no evidence of sex differential in neonatal survival. They had neonatal mortality of 287 and infant mortality of 468, both per 1000 live births. These rates were respectively five and four times the rate for singletons in the study. Survival from 12 months through age nine years was similar overall for both discordant twins and singletons for each sex. However, higher female than male mortality was present among discordant twins after the first few months of life. This differential was most prominent during the second year of life and appeared wider than that observed for the singletons. This paper reports findings from a study that compared survival of 204 pairs of liveborn twins of different sex and random sample of 2371 singleton livebirths from the same population in Matlab, Bangladesh during 1977-85. The different-sex twins showed no evidence of sex differential in neonatal survival. They had a neonatal mortality of 287 and an infant mortality of 468, both/1000 livebirths. These rates were respectively 5 and 4 times the rate for singletons in this study. Survival from 12 months through 9 years was similar overall for both different-sex twins and singletons of each sex. However, higher female mortality was seen among different-sex twins after the 1st months of life. This differential was most prominent during the 2nd year of life and appeared wider than that observed for the singletons.
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