Levels of gender inequality across the world are associated with disproportionate death rates among girls under five years old, according to a study led by Queen Mary University of London.
The analysis of data from 195 countries suggests that the unequal treatment of females in society could be interfering with the natural biological advantage they have over males for survival.
Lead researcher Dr Valentina Gallo from Queen Mary University of London said: "The more unequal a society, the more girls are penalised in terms of their survival chances, particularly in lower-middle income countries. Gender inequality then perpetuates itself through the generations via these unfair odds of survival.
"Because of a sexist ideology which values boys over girls, young girls are often at greater risk of mortality through diminished access to health resources, as well as through heightened exposure to health risks. These girls are also further exposed to this risk via their mothers, who may themselves be penalised and valued less than mothers of sons, and less able to provide for their daughters."
In 2015, a total of 5.9 million children under the age of five years died. More than half of these early deaths were preventable and the result of socio-economic factors and barriers to healthcare. Children are at a greater risk of dying before the age of five if they are born in rural areas, within poor households, or to a mother denied basic education.
Previous studies have shown that greater gender inequality is associated with higher infant mortality, but up until now, it was not known whether boys or girls were more affected.
The study, published in the journal BMJ Global Health, compared countries' sex-specific under-five mortality rates from the UNICEF database, with their Gender Inequality Index (GII). GII is a measure of gender inequality that takes into account reproductive health, empowerment, and economic status, which varies from a minimum of 0.040 in Switzerland to a maximum of 0.767 in Yemen.
Overall, boys have a slightly higher mortality than girls worldwide, which is thought to be due to a relative biological advantage of girls over boys. However, the study finds that the higher the gender inequality in a country, the more girls would die compared to boys, counteracting the girls' innate biological advantage.
Explaining some of the reasons behind the disproportionate death rates amongst girls in those countries, the authors draw on examples, such as in India, where girls have lower odds than boys of receiving certain types of health care, including vaccinations, and are vulnerable to female infanticide and circumcision.
The researchers argue that global policy should extend its focus beyond economic development, and work to reduce gender inequality across a variety of domains including reproductive health, political empowerment, educational attainment, and participation in the work force.
A key limitation of the study is the inability to draw firm conclusions on individuals from the aggregated data. Other studies are also needed to show definitive causal links between gender inequality and under five mortality.
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Notes to the editor
- Embargoed research paper, maps, graphs and data tables can be found on Dropbox here: http://bit.
- Research paper: Girls' hidden penalty: analysis of gender inequality in child mortality with data from 195 countries. Neelam Iqbal, Anna Gkiouleka, Adrienne Milner, Doreen Montag and Valentina Gallo. BMJ Global Health. DOI: 10.1136/bmjgh-2018-001028
Available here after the embargo lifts: http://dx.
About Queen Mary University of London
Queen Mary University of London is a world-leading research-intensive university with over 25,000 students representing more than 160 nationalities.
A member of the prestigious Russell Group, we work across the humanities and social sciences, medicine and dentistry, and science and engineering, with inspirational teaching directly informed by our research.
In the most recent exercise that rated research in the UK, we were ranked 5th in the country for the proportion of research outputs that were world-leading or internationally excellent. We offer more than 240 degree programmes and our reputation for excellent teaching was rewarded with a silver in the 2017 Teaching Excellence Framework (TEF) awards.
Queen Mary's history dates back to 1785, with the foundation of the London Hospital Medical College. Our history encompasses the establishment of the People's Palace in 1887, which brought accessible education, culture and recreation to the East End of London. We also have roots in Westfield College, one of the first colleges to provide higher education to women.