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rft.atitle Lower Mortality for Female-Female Twins Than Male-Male and Male-Female Twins in Rural Senegal
rft.epage 422
rft.genre article
rft.issn 1044-3983
rft.issue 4
rft.jtitle Epidemiology
rft.tpages 3
rft.pages 419-422
rft.pub Williams & Wilkins and Epidemiology Resources Inc.
rft.date 1995-07-01
x.date 1995-07-01T00:00:00Z
rft.spage 419
rft.volume 6
abstract <p>Twins have been registered prospectively for 12-22 years in 42 small villages in the Bandafassi area of Eastern Senegal. We studied 98 pairs of twins to test whether twins in opposite-sex pairs have higher postneonatal mortality than same-sex twins. Neonatal mortality for twins was 41.3%; mortality for infants and for children under age 5 years was 53.0% and 66.8%, respectively. Neonatal mortality was identical for same-sex and opposite-sex twin pairs, but much higher for boys than girls [relative risk = 1.8; 95% confidence interval (CI) = 1.2-2.6]. There was clustering of double neonatal deaths for all types of twins. In the postneonatal period, female-female twins had lower mortality than other twin types. Twins had higher postneonatal mortality as long as the co-twin was alive [mortality rate ratio (MR) = 2.6; 95% CI = 1.0-6.7]. Girls had excess mortality when the co-twin was of the opposite sex (MR = 4.3; 95% CI = 1.2-15.3), whereas there was no difference for boys. In conclusion, contact with a co-twin of the opposite sex increased child mortality for female twins. Our data are not sufficient to determine whether this difference is specific for girls or applies to boys as well.</p>
authors Array ( [rft.aulast] => Aaby [rft.aufirst] => Peter )
Array ( [rft.aulast] => Pison [rft.aufirst] => Gilles )
Array ( [rft.aulast] => du Loû [rft.aufirst] => Annabel Desgrées )
Array ( [rft.aulast] => Andersen [rft.aufirst] => Marc )
languages eng
url https://www.jstor.org/stable/3702091
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author Aaby, Peter, Pison, Gilles, du Loû, Annabel Desgrées, Andersen, Marc
author_facet Aaby, Peter, Pison, Gilles, du Loû, Annabel Desgrées, Andersen, Marc, Aaby, Peter, Pison, Gilles, du Loû, Annabel Desgrées, Andersen, Marc
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container_issue 4
container_start_page 419
container_title Epidemiology
container_volume 6
description <p>Twins have been registered prospectively for 12-22 years in 42 small villages in the Bandafassi area of Eastern Senegal. We studied 98 pairs of twins to test whether twins in opposite-sex pairs have higher postneonatal mortality than same-sex twins. Neonatal mortality for twins was 41.3%; mortality for infants and for children under age 5 years was 53.0% and 66.8%, respectively. Neonatal mortality was identical for same-sex and opposite-sex twin pairs, but much higher for boys than girls [relative risk = 1.8; 95% confidence interval (CI) = 1.2-2.6]. There was clustering of double neonatal deaths for all types of twins. In the postneonatal period, female-female twins had lower mortality than other twin types. Twins had higher postneonatal mortality as long as the co-twin was alive [mortality rate ratio (MR) = 2.6; 95% CI = 1.0-6.7]. Girls had excess mortality when the co-twin was of the opposite sex (MR = 4.3; 95% CI = 1.2-15.3), whereas there was no difference for boys. In conclusion, contact with a co-twin of the opposite sex increased child mortality for female twins. Our data are not sufficient to determine whether this difference is specific for girls or applies to boys as well.</p>
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imprint Williams & Wilkins and Epidemiology Resources Inc., 1995
imprint_str_mv Williams & Wilkins and Epidemiology Resources Inc., 1995
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spelling Aaby, Peter Pison, Gilles du Loû, Annabel Desgrées Andersen, Marc 1044-3983 Williams & Wilkins and Epidemiology Resources Inc. https://www.jstor.org/stable/3702091 <p>Twins have been registered prospectively for 12-22 years in 42 small villages in the Bandafassi area of Eastern Senegal. We studied 98 pairs of twins to test whether twins in opposite-sex pairs have higher postneonatal mortality than same-sex twins. Neonatal mortality for twins was 41.3%; mortality for infants and for children under age 5 years was 53.0% and 66.8%, respectively. Neonatal mortality was identical for same-sex and opposite-sex twin pairs, but much higher for boys than girls [relative risk = 1.8; 95% confidence interval (CI) = 1.2-2.6]. There was clustering of double neonatal deaths for all types of twins. In the postneonatal period, female-female twins had lower mortality than other twin types. Twins had higher postneonatal mortality as long as the co-twin was alive [mortality rate ratio (MR) = 2.6; 95% CI = 1.0-6.7]. Girls had excess mortality when the co-twin was of the opposite sex (MR = 4.3; 95% CI = 1.2-15.3), whereas there was no difference for boys. In conclusion, contact with a co-twin of the opposite sex increased child mortality for female twins. Our data are not sufficient to determine whether this difference is specific for girls or applies to boys as well.</p> Lower Mortality for Female-Female Twins Than Male-Male and Male-Female Twins in Rural Senegal Epidemiology
spellingShingle Aaby, Peter, Pison, Gilles, du Loû, Annabel Desgrées, Andersen, Marc, Epidemiology, Lower Mortality for Female-Female Twins Than Male-Male and Male-Female Twins in Rural Senegal
title Lower Mortality for Female-Female Twins Than Male-Male and Male-Female Twins in Rural Senegal
title_full Lower Mortality for Female-Female Twins Than Male-Male and Male-Female Twins in Rural Senegal
title_fullStr Lower Mortality for Female-Female Twins Than Male-Male and Male-Female Twins in Rural Senegal
title_full_unstemmed Lower Mortality for Female-Female Twins Than Male-Male and Male-Female Twins in Rural Senegal
title_short Lower Mortality for Female-Female Twins Than Male-Male and Male-Female Twins in Rural Senegal
title_sort lower mortality for female-female twins than male-male and male-female twins in rural senegal
title_unstemmed Lower Mortality for Female-Female Twins Than Male-Male and Male-Female Twins in Rural Senegal
url https://www.jstor.org/stable/3702091