Married couples share risk of developing diabetes -- ScienceDaily'If we adjusted for the women's own weight, they did not have a heightened risk of developing type 2 diabetes as a result of their husband's BMI. But even when we adjusted for the weight in men, they had a heightened risk', says Jannie Nielsen. A man, whose wife had a BMI of 30 kg/m2, had a 21-per cent higher risk of developing diabetes than men whose wives had a BMI of 25 kg/m2 -- regardless of the man's own BMI. The researchers have not examined why only the men still had a heightened risk after own weight adjustment. They do have a theory, though, which involves who is in charge of the household. 'We believe it is because women generally decide what we eat at home. That is, women have greater influence on their spouse's dietary habits than men do', Jannie Nielsen explains and refers, among other things, to a US study, which showed that women more often than men are responsible for doing the household's cooking and shopping.