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Short or Overweight? Socioeconomic Factors Link

  • Published: 2016-03-09 : University of Exeter (exeter.ac.uk).
  • Synopsis: Research reveals being a shorter man or overweight woman leads to lower chances in life - including lower income.
Socioeconomics

Socioeconomics - (social economics) - Defined as the social science that studies how economic activity affects and is shaped by social processes. In general it analyzes how societies progress, stagnate, or regress because of their local or regional economy, or the global economy. The term 'social economics' may refer broadly to the "use of economics in the study of society.

Socioeconomic Status - (SES) - An economic and sociological combined total measure of a person's work experience and of an individual's or family's economic and social position in relation to others, based on income, education, and occupation.

Main Document

Quote: "This is the best available evidence to indicate that your height or weight can directly influence your earnings and other socioeconomic factors throughout your life..."

Scientists at the University of Exeter have found the most robust evidence yet that simply being a shorter man or a more overweight woman leads to lower chances in life, including a lower income.

It has long been known that there is a link between height and weight and how well off a person is, in terms of socioeconomic factors including earnings, postcode, level of education and job type. People from poorer backgrounds are less likely to grow tall and more likely to put on weight, in part because of a poorer education and nutrition in childhood and early adulthood. Now, in research led by the University of Exeter and published in The BMJ, scientists have used genetics to show that shorter height in men or higher body mass index (a measure of weight for a given height) in women leads to reduced chances in life, including income.

Using data from 120,000 participants in the UK Biobank (aged between 40 and 70) for whom genetic information was available, the team studied 400 genetic variants that are associated with height, and 70 associated with body mass index. They used these genetic variants, together with actual height and weight, to ask whether or not shorter stature or higher BMI could lead to lower chances in life - as measured by information the participants provided about their lives.

Their findings were stark:

Professor Tim Frayling, of the University of Exeter Medical School, who oversaw the study, said:

"This is the best available evidence to indicate that your height or weight can directly influence your earnings and other socioeconomic factors throughout your life. Although we knew there was a strong association, most people assumed that shorter height and higher BMI were a consequence of poorer nutrition and chances in life. Now we have shown that there is an effect in the other direction as well - shorter height and higher BMI can actually lead to lower income and other lifestyle measures. This won't apply in every case, many shorter men and overweight women are very successful, but science must now ask why we are seeing this pattern. Is this down to factors such as low self-esteem or depression, or is it more to do with discrimination? In a world where we are obsessed with body image, are employers biased? That would be bad both for the individuals involved and for society."

The cohort analysed for this study was made up of people who had volunteered to take part in medical research, and the authors acknowledge that, as with all similar studies, the people taking part do not perfectly reflect those from the wider population. For example UK Biobank volunteers have a generally higher level of education. The findings may also reflect effects from previous generations - because we share our genes and our social circumstances with our parents. However, the authors believe such factors would not have resulted in the sex specific effects that they found.

Dr Jessica Tyrrell, lead author on the study, said:

"The genetic analysis we used is the best possible method to test this link outside of randomly altering people's height and weight for a study, which is obviously impossible. Because we used genetics and 120,000 people, this is the strongest evidence to date that there's something about being shorter as a man and having a higher BMI as a woman that leads to being less well-off financially."

The study was supported by the European Research Council through the project "GLUCOSEGENES - The causes of hyperglycaemia in the face of rising obesity". The paper "Shorter stature and higher BMI lower socioeconomic status: a Mendelian randomisation study in the UK Biobank" is published online in the BMJ on Tuesday March 1, by: Jess Tyrrell, Samuel Jones, Robin Beaumont, Rebecca Lovell, Hanieh Yaghootkar, Marcus Tuke, Katherine Ruth, Rachel Freathy, Andrew Wood, Anna Murray, Michael Weedon and Tim Frayling, all of the University of Exeter Medical School; Christina Astley, Broad Institute of MIT and Harvard; and Joel Hirschhorn, Boston Children's Hospital.

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